)]}'
{
  "log": [
    {
      "commit": "654443e20dfc0617231f28a07c96a979ee1a0239",
      "tree": "a0dc3f093eb13892539082e663607c34b4fc2d07",
      "parents": [
        "2c01e7bc46f10e9190818437e564f7e0db875ae9",
        "9cba26e66d09bf394ae5a739627a1dc8b7cae6f4"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 24 11:39:34 2012 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 24 11:39:34 2012 -0700"
      },
      "message": "Merge branch \u0027perf-uprobes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull user-space probe instrumentation from Ingo Molnar:\n \"The uprobes code originates from SystemTap and has been used for years\n  in Fedora and RHEL kernels.  This version is much rewritten, reviews\n  from PeterZ, Oleg and myself shaped the end result.\n\n  This tree includes uprobes support in \u0027perf probe\u0027 - but SystemTap\n  (and other tools) can take advantage of user probe points as well.\n\n  Sample usage of uprobes via perf, for example to profile malloc()\n  calls without modifying user-space binaries.\n\n  First boot a new kernel with CONFIG_UPROBE_EVENT\u003dy enabled.\n\n  If you don\u0027t know which function you want to probe you can pick one\n  from \u0027perf top\u0027 or can get a list all functions that can be probed\n  within libc (binaries can be specified as well):\n\n\t$ perf probe -F -x /lib/libc.so.6\n\n  To probe libc\u0027s malloc():\n\n\t$ perf probe -x /lib64/libc.so.6 malloc\n\tAdded new event:\n\tprobe_libc:malloc    (on 0x7eac0)\n\n  You can now use it in all perf tools, such as:\n\n\tperf record -e probe_libc:malloc -aR sleep 1\n\n  Make use of it to create a call graph (as the flat profile is going to\n  look very boring):\n\n\t$ perf record -e probe_libc:malloc -gR make\n\t[ perf record: Woken up 173 times to write data ]\n\t[ perf record: Captured and wrote 44.190 MB perf.data (~1930712\n\n\t$ perf report | less\n\n\t  32.03%            git  libc-2.15.so   [.] malloc\n\t                    |\n\t                    --- malloc\n\n\t  29.49%            cc1  libc-2.15.so   [.] malloc\n\t                    |\n\t                    --- malloc\n\t                       |\n\t                       |--0.95%-- 0x208eb1000000000\n\t                       |\n\t                       |--0.63%-- htab_traverse_noresize\n\n\t  11.04%             as  libc-2.15.so   [.] malloc\n\t                     |\n\t                     --- malloc\n\t                        |\n\n\t   7.15%             ld  libc-2.15.so   [.] malloc\n\t                     |\n\t                     --- malloc\n\t                        |\n\n\t   5.07%             sh  libc-2.15.so   [.] malloc\n\t                     |\n\t                     --- malloc\n\t                        |\n\t   4.99%  python-config  libc-2.15.so   [.] malloc\n\t          |\n\t          --- malloc\n\t             |\n\t   4.54%           make  libc-2.15.so   [.] malloc\n\t                   |\n\t                   --- malloc\n\t                      |\n\t                      |--7.34%-- glob\n\t                      |          |\n\t                      |          |--93.18%-- 0x41588f\n\t                      |          |\n\t                      |           --6.82%-- glob\n\t                      |                     0x41588f\n\n\t   ...\n\n  Or:\n\n\t$ perf report -g flat | less\n\n\t# Overhead        Command  Shared Object      Symbol\n\t# ........  .............  .............  ..........\n\t#\n\t  32.03%            git  libc-2.15.so   [.] malloc\n\t          27.19%\n\t              malloc\n\n\t  29.49%            cc1  libc-2.15.so   [.] malloc\n\t          24.77%\n\t              malloc\n\n\t  11.04%             as  libc-2.15.so   [.] malloc\n\t          11.02%\n\t              malloc\n\n\t   7.15%             ld  libc-2.15.so   [.] malloc\n\t           6.57%\n\t              malloc\n\n\t ...\n\n  The core uprobes design is fairly straightforward: uprobes probe\n  points register themselves at (inode:offset) addresses of\n  libraries/binaries, after which all existing (or new) vmas that map\n  that address will have a software breakpoint injected at that address.\n  vmas are COW-ed to preserve original content.  The probe points are\n  kept in an rbtree.\n\n  If user-space executes the probed inode:offset instruction address\n  then an event is generated which can be recovered from the regular\n  perf event channels and mmap-ed ring-buffer.\n\n  Multiple probes at the same address are supported, they create a\n  dynamic callback list of event consumers.\n\n  The basic model is further complicated by the XOL speedup: the\n  original instruction that is probed is copied (in an architecture\n  specific fashion) and executed out of line when the probe triggers.\n  The XOL area is a single vma per process, with a fixed number of\n  entries (which limits probe execution parallelism).\n\n  The API: uprobes are installed/removed via\n  /sys/kernel/debug/tracing/uprobe_events, the API is integrated to\n  align with the kprobes interface as much as possible, but is separate\n  to it.\n\n  Injecting a probe point is privileged operation, which can be relaxed\n  by setting perf_paranoid to -1.\n\n  You can use multiple probes as well and mix them with kprobes and\n  regular PMU events or tracepoints, when instrumenting a task.\"\n\nFix up trivial conflicts in mm/memory.c due to previous cleanup of\nunmap_single_vma().\n\n* \u0027perf-uprobes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)\n  perf probe: Detect probe target when m/x options are absent\n  perf probe: Provide perf interface for uprobes\n  tracing: Fix kconfig warning due to a typo\n  tracing: Provide trace events interface for uprobes\n  tracing: Extract out common code for kprobes/uprobes trace events\n  tracing: Modify is_delete, is_return from int to bool\n  uprobes/core: Decrement uprobe count before the pages are unmapped\n  uprobes/core: Make background page replacement logic account for rss_stat counters\n  uprobes/core: Optimize probe hits with the help of a counter\n  uprobes/core: Allocate XOL slots for uprobes use\n  uprobes/core: Handle breakpoint and singlestep exceptions\n  uprobes/core: Rename bkpt to swbp\n  uprobes/core: Make order of function parameters consistent across functions\n  uprobes/core: Make macro names consistent\n  uprobes: Update copyright notices\n  uprobes/core: Move insn to arch specific structure\n  uprobes/core: Remove uprobe_opcode_sz\n  uprobes/core: Make instruction tables volatile\n  uprobes: Move to kernel/events/\n  uprobes/core: Clean up, refactor and improve the code\n  ...\n"
    },
    {
      "commit": "644473e9c60c1ff4f6351fed637a6e5551e3dce7",
      "tree": "10316518bedc735a2c6552886658d69dfd9f1eb0",
      "parents": [
        "fb827ec68446c83e9e8754fa9b55aed27ecc4661",
        "4b06a81f1daee668fbd6de85557bfb36dd36078f"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed May 23 17:42:39 2012 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed May 23 17:42:39 2012 -0700"
      },
      "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace\n\nPull user namespace enhancements from Eric Biederman:\n \"This is a course correction for the user namespace, so that we can\n  reach an inexpensive, maintainable, and reasonably complete\n  implementation.\n\n  Highlights:\n   - Config guards make it impossible to enable the user namespace and\n     code that has not been converted to be user namespace safe.\n\n   - Use of the new kuid_t type ensures the if you somehow get past the\n     config guards the kernel will encounter type errors if you enable\n     user namespaces and attempt to compile in code whose permission\n     checks have not been updated to be user namespace safe.\n\n   - All uids from child user namespaces are mapped into the initial\n     user namespace before they are processed.  Removing the need to add\n     an additional check to see if the user namespace of the compared\n     uids remains the same.\n\n   - With the user namespaces compiled out the performance is as good or\n     better than it is today.\n\n   - For most operations absolutely nothing changes performance or\n     operationally with the user namespace enabled.\n\n   - The worst case performance I could come up with was timing 1\n     billion cache cold stat operations with the user namespace code\n     enabled.  This went from 156s to 164s on my laptop (or 156ns to\n     164ns per stat operation).\n\n   - (uid_t)-1 and (gid_t)-1 are reserved as an internal error value.\n     Most uid/gid setting system calls treat these value specially\n     anyway so attempting to use -1 as a uid would likely cause\n     entertaining failures in userspace.\n\n   - If setuid is called with a uid that can not be mapped setuid fails.\n     I have looked at sendmail, login, ssh and every other program I\n     could think of that would call setuid and they all check for and\n     handle the case where setuid fails.\n\n   - If stat or a similar system call is called from a context in which\n     we can not map a uid we lie and return overflowuid.  The LFS\n     experience suggests not lying and returning an error code might be\n     better, but the historical precedent with uids is different and I\n     can not think of anything that would break by lying about a uid we\n     can\u0027t map.\n\n   - Capabilities are localized to the current user namespace making it\n     safe to give the initial user in a user namespace all capabilities.\n\n  My git tree covers all of the modifications needed to convert the core\n  kernel and enough changes to make a system bootable to runlevel 1.\"\n\nFix up trivial conflicts due to nearby independent changes in fs/stat.c\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (46 commits)\n  userns:  Silence silly gcc warning.\n  cred: use correct cred accessor with regards to rcu read lock\n  userns: Convert the move_pages, and migrate_pages permission checks to use uid_eq\n  userns: Convert cgroup permission checks to use uid_eq\n  userns: Convert tmpfs to use kuid and kgid where appropriate\n  userns: Convert sysfs to use kgid/kuid where appropriate\n  userns: Convert sysctl permission checks to use kuid and kgids.\n  userns: Convert proc to use kuid/kgid where appropriate\n  userns: Convert ext4 to user kuid/kgid where appropriate\n  userns: Convert ext3 to use kuid/kgid where appropriate\n  userns: Convert ext2 to use kuid/kgid where appropriate.\n  userns: Convert devpts to use kuid/kgid where appropriate\n  userns: Convert binary formats to use kuid/kgid where appropriate\n  userns: Add negative depends on entries to avoid building code that is userns unsafe\n  userns: signal remove unnecessary map_cred_ns\n  userns: Teach inode_capable to understand inodes whose uids map to other namespaces.\n  userns: Fail exec for suid and sgid binaries with ids outside our user namespace.\n  userns: Convert stat to return values mapped from kuids and kgids\n  userns: Convert user specfied uids and gids in chown into kuids and kgid\n  userns: Use uid_eq gid_eq helpers when comparing kuids and kgids in the vfs\n  ...\n"
    },
    {
      "commit": "d79ee93de909dfb252279b9a95978bbda9a814a9",
      "tree": "bfccca60fd36259ff4bcc5e78a2c272fbd680065",
      "parents": [
        "2ff2b289a695807e291e1ed9f639d8a3ba5f4254",
        "1c2927f18576d65631d8e0ddd19e1d023183222e"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue May 22 18:27:32 2012 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue May 22 18:27:32 2012 -0700"
      },
      "message": "Merge branch \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull scheduler changes from Ingo Molnar:\n \"The biggest change is the cleanup/simplification of the load-balancer:\n  instead of the current practice of architectures twiddling scheduler\n  internal data structures and providing the scheduler domains in\n  colorfully inconsistent ways, we now have generic scheduler code in\n  kernel/sched/core.c:sched_init_numa() that looks at the architecture\u0027s\n  node_distance() parameters and (while not fully trusting it) deducts a\n  NUMA topology from it.\n\n  This inevitably changes balancing behavior - hopefully for the better.\n\n  There are various smaller optimizations, cleanups and fixlets as well\"\n\n* \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n  sched: Taint kernel with TAINT_WARN after sleep-in-atomic bug\n  sched: Remove stale power aware scheduling remnants and dysfunctional knobs\n  sched/debug: Fix printing large integers on 32-bit platforms\n  sched/fair: Improve the -\u003egroup_imb logic\n  sched/nohz: Fix rq-\u003ecpu_load[] calculations\n  sched/numa: Don\u0027t scale the imbalance\n  sched/fair: Revert sched-domain iteration breakage\n  sched/x86: Rewrite set_cpu_sibling_map()\n  sched/numa: Fix the new NUMA topology bits\n  sched/numa: Rewrite the CONFIG_NUMA sched domain support\n  sched/fair: Propagate \u0027struct lb_env\u0027 usage into find_busiest_group\n  sched/fair: Add some serialization to the sched_domain load-balance walk\n  sched/fair: Let minimally loaded cpu balance the group\n  sched: Change rq-\u003enr_running to unsigned int\n  x86/numa: Check for nonsensical topologies on real hw as well\n  x86/numa: Hard partition cpu topology masks on node boundaries\n  x86/numa: Allow specifying node_distance() for numa\u003dfake\n  x86/sched: Make mwait_usable() heed to \"idle\u003d\" kernel parameters properly\n  sched: Update documentation and comments\n  sched_rt: Avoid unnecessary dequeue and enqueue of pushable tasks in set_cpus_allowed_rt()\n"
    },
    {
      "commit": "cb60e3e65c1b96a4d6444a7a13dc7dd48bc15a2b",
      "tree": "4322be35db678f6299348a76ad60a2023954af7d",
      "parents": [
        "99262a3dafa3290866512ddfb32609198f8973e9",
        "ff2bb047c4bce9742e94911eeb44b4d6ff4734ab"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon May 21 20:27:36 2012 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon May 21 20:27:36 2012 -0700"
      },
      "message": "Merge branch \u0027next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security\n\nPull security subsystem updates from James Morris:\n \"New notable features:\n   - The seccomp work from Will Drewry\n   - PR_{GET,SET}_NO_NEW_PRIVS from Andy Lutomirski\n   - Longer security labels for Smack from Casey Schaufler\n   - Additional ptrace restriction modes for Yama by Kees Cook\"\n\nFix up trivial context conflicts in arch/x86/Kconfig and include/linux/filter.h\n\n* \u0027next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (65 commits)\n  apparmor: fix long path failure due to disconnected path\n  apparmor: fix profile lookup for unconfined\n  ima: fix filename hint to reflect script interpreter name\n  KEYS: Don\u0027t check for NULL key pointer in key_validate()\n  Smack: allow for significantly longer Smack labels v4\n  gfp flags for security_inode_alloc()?\n  Smack: recursive tramsmute\n  Yama: replace capable() with ns_capable()\n  TOMOYO: Accept manager programs which do not start with / .\n  KEYS: Add invalidation support\n  KEYS: Do LRU discard in full keyrings\n  KEYS: Permit in-place link replacement in keyring list\n  KEYS: Perform RCU synchronisation on keys prior to key destruction\n  KEYS: Announce key type (un)registration\n  KEYS: Reorganise keys Makefile\n  KEYS: Move the key config into security/keys/Kconfig\n  KEYS: Use the compat keyctl() syscall wrapper on Sparc64 for Sparc32 compat\n  Yama: remove an unused variable\n  samples/seccomp: fix dependencies on arch macros\n  Yama: add additional ptrace scopes\n  ...\n"
    },
    {
      "commit": "8e7fbcbc22c12414bcc9dfdd683637f58fb32759",
      "tree": "a438021ddeadddd8f0745293aeb8c80dbe3c999c",
      "parents": [
        "fac536f7e4927f34d480dc066f3a578c743b8f0e"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "peterz@infradead.org",
        "time": "Mon Jan 09 11:28:35 2012 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@kernel.org",
        "time": "Thu May 17 13:48:56 2012 +0200"
      },
      "message": "sched: Remove stale power aware scheduling remnants and dysfunctional knobs\n\nIt\u0027s been broken forever (i.e. it\u0027s not scheduling in a power\naware fashion), as reported by Suresh and others sending\npatches, and nobody cares enough to fix it properly ...\nso remove it to make space free for something better.\n\nThere\u0027s various problems with the code as it stands today, first\nand foremost the user interface which is bound to topology\nlevels and has multiple values per level. This results in a\nstate explosion which the administrator or distro needs to\nmaster and almost nobody does.\n\nFurthermore large configuration state spaces aren\u0027t good, it\nmeans the thing doesn\u0027t just work right because it\u0027s either\nunder so many impossibe to meet constraints, or even if\nthere\u0027s an achievable state workloads have to be aware of\nit precisely and can never meet it for dynamic workloads.\n\nSo pushing this kind of decision to user-space was a bad idea\neven with a single knob - it\u0027s exponentially worse with knobs\non every node of the topology.\n\nThere is a proposal to replace the user interface with a single\n3 state knob:\n\n sched_balance_policy :\u003d { performance, power, auto }\n\nwhere \u0027auto\u0027 would be the preferred default which looks at things\nlike Battery/AC mode and possible cpufreq state or whatever the hw\nexposes to show us power use expectations - but there\u0027s been no\nprogress on it in the past many months.\n\nAside from that, the actual implementation of the various knobs\nis known to be broken. There have been sporadic attempts at\nfixing things but these always stop short of reaching a mergable\nstate.\n\nTherefore this wholesale removal with the hopes of spurring\npeople who care to come forward once again and work on a\ncoherent replacement.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Suresh Siddha \u003csuresh.b.siddha@intel.com\u003e\nCc: Arjan van de Ven \u003carjan@linux.intel.com\u003e\nCc: Vincent Guittot \u003cvincent.guittot@linaro.org\u003e\nCc: Vaidyanathan Srinivasan \u003csvaidy@linux.vnet.ibm.com\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLink: http://lkml.kernel.org/r/1326104915.2442.53.camel@twins\nSigned-off-by: Ingo Molnar \u003cmingo@kernel.org\u003e\n"
    },
    {
      "commit": "04f733b4afac5dc93ae9b0a8703c60b87def491e",
      "tree": "7ef166c4d1c1dffdc993efbf3791d0f745f5a80c",
      "parents": [
        "316ad248307fba13be40f01e92a22b89457c32bc"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Fri May 11 00:12:02 2012 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@kernel.org",
        "time": "Mon May 14 15:05:26 2012 +0200"
      },
      "message": "sched/fair: Revert sched-domain iteration breakage\n\nPatches c22402a2f (\"sched/fair: Let minimally loaded cpu balance the\ngroup\") and 0ce90475 (\"sched/fair: Add some serialization to the\nsched_domain load-balance walk\") are horribly broken so revert them.\n\nThe problem is that while it sounds good to have the minimally loaded\ncpu do the pulling of more load, the way we walk the domains there is\nabsolutely no guarantee this cpu will actually get to the domain. In\nfact its very likely it wont. Therefore the higher up the tree we get,\nthe less likely it is we\u0027ll balance at all.\n\nThe first of mask always walks up, while sucky in that it accumulates\nload on the first cpu and needs extra passes to spread it out at least\nguarantees a cpu gets up that far and load-balancing happens at all.\n\nSince its now always the first and idle cpus should always be able to\nbalance so they get a task as fast as possible we can also do away\nwith the added serialization.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/n/tip-rpuhs5s56aiv1aw7khv9zkw6@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@kernel.org\u003e\n"
    },
    {
      "commit": "0ce90475dcdbe90affc218e9688c8401e468e84d",
      "tree": "30771f6a6791af0214c5e7d57958f6395f3b97f5",
      "parents": [
        "c22402a2f76e88b04b7a8b6c0597ad9ba6fd71de"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Wed Apr 25 00:30:36 2012 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@kernel.org",
        "time": "Wed May 09 15:00:53 2012 +0200"
      },
      "message": "sched/fair: Add some serialization to the sched_domain load-balance walk\n\nSince the sched_domain walk is completely unserialized (!SD_SERIALIZE)\nit is possible that multiple cpus in the group get elected to do the\nnext level. Avoid this by adding some serialization.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/n/tip-vqh9ai6s0ewmeakjz80w4qz6@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@kernel.org\u003e\n"
    },
    {
      "commit": "489a71b029cd94e3b0132795146e8be3a87bf3fa",
      "tree": "84054064a9dd96372f94257b2e7d809ed6fbc562",
      "parents": [
        "436281c9a110ff16c1fb396add5dd944ee92cf36"
      ],
      "author": {
        "name": "Hiroshi Shimamoto",
        "email": "h-shimamoto@ct.jp.nec.com",
        "time": "Mon Apr 02 17:00:44 2012 +0900"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@kernel.org",
        "time": "Mon May 07 15:04:18 2012 +0200"
      },
      "message": "sched: Update documentation and comments\n\nChange sched_*.c to sched/*.c in documentation and comments.\n\nSigned-off-by: Hiroshi Shimamoto \u003ch-shimamoto@ct.jp.nec.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/r/4F795CAC.9080206@ct.jp.nec.com\nSigned-off-by: Ingo Molnar \u003cmingo@kernel.org\u003e\n"
    },
    {
      "commit": "616c310e83b872024271c915c1b9ab505b9efad9",
      "tree": "1339bc7b3bef920b4641a5af2f182e9dfa2a6632",
      "parents": [
        "66f75a5d028beaf67c931435fdc3e7823125730c"
      ],
      "author": {
        "name": "Paul E. McKenney",
        "email": "paul.mckenney@linaro.org",
        "time": "Tue Mar 27 16:02:08 2012 -0700"
      },
      "committer": {
        "name": "Paul E. McKenney",
        "email": "paulmck@linux.vnet.ibm.com",
        "time": "Wed May 02 14:43:23 2012 -0700"
      },
      "message": "rcu: Move PREEMPT_RCU preemption to switch_to() invocation\n\nCurrently, PREEMPT_RCU readers are enqueued upon entry to the scheduler.\nThis is inefficient because enqueuing is required only if there is a\ncontext switch, and entry to the scheduler does not guarantee a context\nswitch.\n\nThe commit therefore moves the enqueuing to immediately precede the\ncall to switch_to() from the scheduler.\n\nSigned-off-by: Paul E. McKenney \u003cpaul.mckenney@linaro.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nTested-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "6ac1ef482d7ae0c690f1640bf6eb818ff9a2d91e",
      "tree": "021cc9f6b477146fcebe6f3be4752abfa2ba18a9",
      "parents": [
        "682968e0c425c60f0dde37977e5beb2b12ddc4cc",
        "a385ec4f11bdcf81af094c03e2444ee9b7fad2e5"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@kernel.org",
        "time": "Sat Apr 14 13:18:27 2012 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@kernel.org",
        "time": "Sat Apr 14 13:19:04 2012 +0200"
      },
      "message": "Merge branch \u0027perf/core\u0027 into perf/uprobes\n\nMerge in latest upstream (and the latest perf development tree),\nto prepare for tooling changes, and also to pick up v3.4 MM\nchanges that the uprobes code needs to take care of.\n\nSigned-off-by: Ingo Molnar \u003cmingo@kernel.org\u003e\n"
    },
    {
      "commit": "932ecebb0405b9a41cd18946e6cff8a17d434e23",
      "tree": "dc40e09ad9bd9964c93023c329d91296009d7e33",
      "parents": [
        "0c5fe1b4221c6701224c2601cf3c692e5721103e"
      ],
      "author": {
        "name": "Will Drewry",
        "email": "wad@chromium.org",
        "time": "Thu Apr 12 16:47:54 2012 -0500"
      },
      "committer": {
        "name": "James Morris",
        "email": "james.l.morris@oracle.com",
        "time": "Sat Apr 14 11:13:19 2012 +1000"
      },
      "message": "seccomp: kill the seccomp_t typedef\n\nReplaces the seccomp_t typedef with struct seccomp to match modern\nkernel style.\n\nSigned-off-by: Will Drewry \u003cwad@chromium.org\u003e\nReviewed-by: James Morris \u003cjmorris@namei.org\u003e\nAcked-by: Serge Hallyn \u003cserge.hallyn@canonical.com\u003e\nAcked-by: Eric Paris \u003ceparis@redhat.com\u003e\n\nv18: rebase\n...\nv14: rebase/nochanges\nv13: rebase on to 88ebdda6159ffc15699f204c33feb3e431bf9bdc\nv12: rebase on to linux-next\nv8-v11: no changes\nv7: struct seccomp_struct -\u003e struct seccomp\nv6: original inclusion in this series.\nSigned-off-by: James Morris \u003cjames.l.morris@oracle.com\u003e\n"
    },
    {
      "commit": "259e5e6c75a910f3b5e656151dc602f53f9d7548",
      "tree": "4405fdf68238f2e33f27b04e8c37c9e29a2493d8",
      "parents": [
        "9ccf010f8172b699ea80178860e8ea228f7dce56"
      ],
      "author": {
        "name": "Andy Lutomirski",
        "email": "luto@amacapital.net",
        "time": "Thu Apr 12 16:47:50 2012 -0500"
      },
      "committer": {
        "name": "James Morris",
        "email": "james.l.morris@oracle.com",
        "time": "Sat Apr 14 11:13:18 2012 +1000"
      },
      "message": "Add PR_{GET,SET}_NO_NEW_PRIVS to prevent execve from granting privs\n\nWith this change, calling\n  prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0)\ndisables privilege granting operations at execve-time.  For example, a\nprocess will not be able to execute a setuid binary to change their uid\nor gid if this bit is set.  The same is true for file capabilities.\n\nAdditionally, LSM_UNSAFE_NO_NEW_PRIVS is defined to ensure that\nLSMs respect the requested behavior.\n\nTo determine if the NO_NEW_PRIVS bit is set, a task may call\n  prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0);\nIt returns 1 if set and 0 if it is not set. If any of the arguments are\nnon-zero, it will return -1 and set errno to -EINVAL.\n(PR_SET_NO_NEW_PRIVS behaves similarly.)\n\nThis functionality is desired for the proposed seccomp filter patch\nseries.  By using PR_SET_NO_NEW_PRIVS, it allows a task to modify the\nsystem call behavior for itself and its child tasks without being\nable to impact the behavior of a more privileged task.\n\nAnother potential use is making certain privileged operations\nunprivileged.  For example, chroot may be considered \"safe\" if it cannot\naffect privileged tasks.\n\nNote, this patch causes execve to fail when PR_SET_NO_NEW_PRIVS is\nset and AppArmor is in use.  It is fixed in a subsequent patch.\n\nSigned-off-by: Andy Lutomirski \u003cluto@amacapital.net\u003e\nSigned-off-by: Will Drewry \u003cwad@chromium.org\u003e\nAcked-by: Eric Paris \u003ceparis@redhat.com\u003e\nAcked-by: Kees Cook \u003ckeescook@chromium.org\u003e\n\nv18: updated change desc\nv17: using new define values as per 3.4\nSigned-off-by: James Morris \u003cjames.l.morris@oracle.com\u003e\n"
    },
    {
      "commit": "7b44ab978b77a91b327058a0f4db7e6fcdb90b92",
      "tree": "632c872f0b88d001f1bddce2c0aacd77bf062454",
      "parents": [
        "5673a94c14574d7c6495c320c6b0e480673d54bd"
      ],
      "author": {
        "name": "Eric W. Biederman",
        "email": "ebiederm@xmission.com",
        "time": "Wed Nov 16 23:20:58 2011 -0800"
      },
      "committer": {
        "name": "Eric W. Biederman",
        "email": "ebiederm@xmission.com",
        "time": "Sat Apr 07 17:11:46 2012 -0700"
      },
      "message": "userns: Disassociate user_struct from the user_namespace.\n\nModify alloc_uid to take a kuid and make the user hash table global.\nStop holding a reference to the user namespace in struct user_struct.\n\nThis simplifies the code and makes the per user accounting not\ncare about which user namespace a uid happens to appear in.\n\nAcked-by: Serge Hallyn \u003cserge.hallyn@canonical.com\u003e\nSigned-off-by: Eric W. Biederman \u003cebiederm@xmission.com\u003e\n"
    },
    {
      "commit": "d0bd6594e286bd6145e04e19e8d3fa2e902cb800",
      "tree": "ec512935f5cf2b4ae95927a47e96ad716159fb04",
      "parents": [
        "6f9ac6d93a0916de09d11b0a247ade8f4347728b"
      ],
      "author": {
        "name": "Eric W. Biederman",
        "email": "ebiederm@xmission.com",
        "time": "Wed Nov 16 23:20:58 2011 -0800"
      },
      "committer": {
        "name": "Eric W. Biederman",
        "email": "ebiederm@xmission.com",
        "time": "Sat Apr 07 16:55:54 2012 -0700"
      },
      "message": "userns: Deprecate and rename the user_namespace reference in the user_struct\n\nWith a user_ns reference in struct cred the only user of the user namespace\nreference in struct user_struct is to keep the uid hash table alive.\n\nThe user_namespace reference in struct user_struct will be going away soon, and\nI have removed all of the references.  Rename the field from user_ns to _user_ns\nso that the compiler can verify nothing follows the user struct to the user\nnamespace anymore.\n\nAcked-by: Serge Hallyn \u003cserge.hallyn@canonical.com\u003e\nSigned-off-by: Eric W. Biederman \u003cebiederm@xmission.com\u003e\n"
    },
    {
      "commit": "57a39aa3e3ca00e371cec37be4f7c2e950eb1f1f",
      "tree": "6f1c6da8f99c210527532bda001711ada1326f77",
      "parents": [
        "975d6b3932d43b87a48d2107264ed0c9a7541d8d"
      ],
      "author": {
        "name": "Eric W. Biederman",
        "email": "ebiederm@xmission.com",
        "time": "Wed Nov 16 22:06:16 2011 -0800"
      },
      "committer": {
        "name": "Eric W. Biederman",
        "email": "ebiederm@xmission.com",
        "time": "Tue Apr 03 04:28:52 2012 -0700"
      },
      "message": "userns: Kill bogus declaration of function release_uids\n\nThere is no release_uids function remove the declaration from sched.h\n\nAcked-by: Serge Hallyn \u003cserge.hallyn@canonical.com\u003e\nSigned-off-by: Eric W. Biederman \u003cebiederm@xmission.com\u003e\n"
    },
    {
      "commit": "0195c00244dc2e9f522475868fa278c473ba7339",
      "tree": "f97ca98ae64ede2c33ad3de05ed7bbfa4f4495ed",
      "parents": [
        "f21ce8f8447c8be8847dadcfdbcc76b0d7365fa5",
        "141124c02059eee9dbc5c86ea797b1ca888e77f7"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Mar 28 15:58:21 2012 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Mar 28 15:58:21 2012 -0700"
      },
      "message": "Merge tag \u0027split-asm_system_h-for-linus-20120328\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system\n\nPull \"Disintegrate and delete asm/system.h\" from David Howells:\n \"Here are a bunch of patches to disintegrate asm/system.h into a set of\n  separate bits to relieve the problem of circular inclusion\n  dependencies.\n\n  I\u0027ve built all the working defconfigs from all the arches that I can\n  and made sure that they don\u0027t break.\n\n  The reason for these patches is that I recently encountered a circular\n  dependency problem that came about when I produced some patches to\n  optimise get_order() by rewriting it to use ilog2().\n\n  This uses bitops - and on the SH arch asm/bitops.h drags in\n  asm-generic/get_order.h by a circuituous route involving asm/system.h.\n\n  The main difficulty seems to be asm/system.h.  It holds a number of\n  low level bits with no/few dependencies that are commonly used (eg.\n  memory barriers) and a number of bits with more dependencies that\n  aren\u0027t used in many places (eg.  switch_to()).\n\n  These patches break asm/system.h up into the following core pieces:\n\n    (1) asm/barrier.h\n\n        Move memory barriers here.  This already done for MIPS and Alpha.\n\n    (2) asm/switch_to.h\n\n        Move switch_to() and related stuff here.\n\n    (3) asm/exec.h\n\n        Move arch_align_stack() here.  Other process execution related bits\n        could perhaps go here from asm/processor.h.\n\n    (4) asm/cmpxchg.h\n\n        Move xchg() and cmpxchg() here as they\u0027re full word atomic ops and\n        frequently used by atomic_xchg() and atomic_cmpxchg().\n\n    (5) asm/bug.h\n\n        Move die() and related bits.\n\n    (6) asm/auxvec.h\n\n        Move AT_VECTOR_SIZE_ARCH here.\n\n  Other arch headers are created as needed on a per-arch basis.\"\n\nFixed up some conflicts from other header file cleanups and moving code\naround that has happened in the meantime, so David\u0027s testing is somewhat\nweakened by that.  We\u0027ll find out anything that got broken and fix it..\n\n* tag \u0027split-asm_system_h-for-linus-20120328\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system: (38 commits)\n  Delete all instances of asm/system.h\n  Remove all #inclusions of asm/system.h\n  Add #includes needed to permit the removal of asm/system.h\n  Move all declarations of free_initmem() to linux/mm.h\n  Disintegrate asm/system.h for OpenRISC\n  Split arch_align_stack() out from asm-generic/system.h\n  Split the switch_to() wrapper out of asm-generic/system.h\n  Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h\n  Create asm-generic/barrier.h\n  Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h\n  Disintegrate asm/system.h for Xtensa\n  Disintegrate asm/system.h for Unicore32 [based on ver #3, changed by gxt]\n  Disintegrate asm/system.h for Tile\n  Disintegrate asm/system.h for Sparc\n  Disintegrate asm/system.h for SH\n  Disintegrate asm/system.h for Score\n  Disintegrate asm/system.h for S390\n  Disintegrate asm/system.h for PowerPC\n  Disintegrate asm/system.h for PA-RISC\n  Disintegrate asm/system.h for MN10300\n  ...\n"
    },
    {
      "commit": "9ffc93f203c18a70623f21950f1dd473c9ec48cd",
      "tree": "1eb3536ae183b0bfbf7f5152a6fe4f430ae881c2",
      "parents": [
        "96f951edb1f1bdbbc99b0cd458f9808bb83d58ae"
      ],
      "author": {
        "name": "David Howells",
        "email": "dhowells@redhat.com",
        "time": "Wed Mar 28 18:30:03 2012 +0100"
      },
      "committer": {
        "name": "David Howells",
        "email": "dhowells@redhat.com",
        "time": "Wed Mar 28 18:30:03 2012 +0100"
      },
      "message": "Remove all #inclusions of asm/system.h\n\nRemove all #inclusions of asm/system.h preparatory to splitting and killing\nit.  Performed with the following command:\n\nperl -p -i -e \u0027s!^#\\s*include\\s*\u003casm/system[.]h\u003e.*\\n!!\u0027 `grep -Irl \u0027^#\\s*include\\s*\u003casm/system[.]h\u003e\u0027 *`\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\n"
    },
    {
      "commit": "ebec18a6d3aa1e7d84aab16225e87fd25170ec2b",
      "tree": "fd329dcd5173c252fc7aed64cab9c2a51575dcec",
      "parents": [
        "953326cb60c1dff1bd3458d6468d16d75f2bcd61"
      ],
      "author": {
        "name": "Lennart Poettering",
        "email": "lennart@poettering.net",
        "time": "Fri Mar 23 15:01:54 2012 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Mar 23 16:58:32 2012 -0700"
      },
      "message": "prctl: add PR_{SET,GET}_CHILD_SUBREAPER to allow simple process supervision\n\nUserspace service managers/supervisors need to track their started\nservices.  Many services daemonize by double-forking and get implicitly\nre-parented to PID 1.  The service manager will no longer be able to\nreceive the SIGCHLD signals for them, and is no longer in charge of\nreaping the children with wait().  All information about the children is\nlost at the moment PID 1 cleans up the re-parented processes.\n\nWith this prctl, a service manager process can mark itself as a sort of\n\u0027sub-init\u0027, able to stay as the parent for all orphaned processes\ncreated by the started services.  All SIGCHLD signals will be delivered\nto the service manager.\n\nReceiving SIGCHLD and doing wait() is in cases of a service-manager much\npreferred over any possible asynchronous notification about specific\nPIDs, because the service manager has full access to the child process\ndata in /proc and the PID can not be re-used until the wait(), the\nservice-manager itself is in charge of, has happened.\n\nAs a side effect, the relevant parent PID information does not get lost\nby a double-fork, which results in a more elaborate process tree and\n\u0027ps\u0027 output:\n\nbefore:\n  # ps afx\n  253 ?        Ss     0:00 /bin/dbus-daemon --system --nofork\n  294 ?        Sl     0:00 /usr/libexec/polkit-1/polkitd\n  328 ?        S      0:00 /usr/sbin/modem-manager\n  608 ?        Sl     0:00 /usr/libexec/colord\n  658 ?        Sl     0:00 /usr/libexec/upowerd\n  819 ?        Sl     0:00 /usr/libexec/imsettings-daemon\n  916 ?        Sl     0:00 /usr/libexec/udisks-daemon\n  917 ?        S      0:00  \\_ udisks-daemon: not polling any devices\n\nafter:\n  # ps afx\n  294 ?        Ss     0:00 /bin/dbus-daemon --system --nofork\n  426 ?        Sl     0:00  \\_ /usr/libexec/polkit-1/polkitd\n  449 ?        S      0:00  \\_ /usr/sbin/modem-manager\n  635 ?        Sl     0:00  \\_ /usr/libexec/colord\n  705 ?        Sl     0:00  \\_ /usr/libexec/upowerd\n  959 ?        Sl     0:00  \\_ /usr/libexec/udisks-daemon\n  960 ?        S      0:00  |   \\_ udisks-daemon: not polling any devices\n  977 ?        Sl     0:00  \\_ /usr/libexec/packagekitd\n\nThis prctl is orthogonal to PID namespaces.  PID namespaces are isolated\nfrom each other, while a service management process usually requires the\nservices to live in the same namespace, to be able to talk to each\nother.\n\nUsers of this will be the systemd per-user instance, which provides\ninit-like functionality for the user\u0027s login session and D-Bus, which\nactivates bus services on-demand.  Both need init-like capabilities to\nbe able to properly keep track of the services they start.\n\nMany thanks to Oleg for several rounds of review and insights.\n\n[akpm@linux-foundation.org: fix comment layout and spelling]\n[akpm@linux-foundation.org: add lengthy code comment from Oleg]\nReviewed-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Lennart Poettering \u003clennart@poettering.net\u003e\nSigned-off-by: Kay Sievers \u003ckay.sievers@vrfy.org\u003e\nAcked-by: Valdis Kletnieks \u003cValdis.Kletnieks@vt.edu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "cc9a6c8776615f9c194ccf0b63a0aa5628235545",
      "tree": "0cbbf118e86541f8eb2fc7b717a0e08eaced986d",
      "parents": [
        "e845e199362cc5712ba0e7eedc14eed70e144258"
      ],
      "author": {
        "name": "Mel Gorman",
        "email": "mgorman@suse.de",
        "time": "Wed Mar 21 16:34:11 2012 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Mar 21 17:54:59 2012 -0700"
      },
      "message": "cpuset: mm: reduce large amounts of memory barrier related damage v3\n\nCommit c0ff7453bb5c (\"cpuset,mm: fix no node to alloc memory when\nchanging cpuset\u0027s mems\") wins a super prize for the largest number of\nmemory barriers entered into fast paths for one commit.\n\n[get|put]_mems_allowed is incredibly heavy with pairs of full memory\nbarriers inserted into a number of hot paths.  This was detected while\ninvestigating at large page allocator slowdown introduced some time\nafter 2.6.32.  The largest portion of this overhead was shown by\noprofile to be at an mfence introduced by this commit into the page\nallocator hot path.\n\nFor extra style points, the commit introduced the use of yield() in an\nimplementation of what looks like a spinning mutex.\n\nThis patch replaces the full memory barriers on both read and write\nsides with a sequence counter with just read barriers on the fast path\nside.  This is much cheaper on some architectures, including x86.  The\nmain bulk of the patch is the retry logic if the nodemask changes in a\nmanner that can cause a false failure.\n\nWhile updating the nodemask, a check is made to see if a false failure\nis a risk.  If it is, the sequence number gets bumped and parallel\nallocators will briefly stall while the nodemask update takes place.\n\nIn a page fault test microbenchmark, oprofile samples from\n__alloc_pages_nodemask went from 4.53% of all samples to 1.15%.  The\nactual results were\n\n                             3.3.0-rc3          3.3.0-rc3\n                             rc3-vanilla        nobarrier-v2r1\n    Clients   1 UserTime       0.07 (  0.00%)   0.08 (-14.19%)\n    Clients   2 UserTime       0.07 (  0.00%)   0.07 (  2.72%)\n    Clients   4 UserTime       0.08 (  0.00%)   0.07 (  3.29%)\n    Clients   1 SysTime        0.70 (  0.00%)   0.65 (  6.65%)\n    Clients   2 SysTime        0.85 (  0.00%)   0.82 (  3.65%)\n    Clients   4 SysTime        1.41 (  0.00%)   1.41 (  0.32%)\n    Clients   1 WallTime       0.77 (  0.00%)   0.74 (  4.19%)\n    Clients   2 WallTime       0.47 (  0.00%)   0.45 (  3.73%)\n    Clients   4 WallTime       0.38 (  0.00%)   0.37 (  1.58%)\n    Clients   1 Flt/sec/cpu  497620.28 (  0.00%) 520294.53 (  4.56%)\n    Clients   2 Flt/sec/cpu  414639.05 (  0.00%) 429882.01 (  3.68%)\n    Clients   4 Flt/sec/cpu  257959.16 (  0.00%) 258761.48 (  0.31%)\n    Clients   1 Flt/sec      495161.39 (  0.00%) 517292.87 (  4.47%)\n    Clients   2 Flt/sec      820325.95 (  0.00%) 850289.77 (  3.65%)\n    Clients   4 Flt/sec      1020068.93 (  0.00%) 1022674.06 (  0.26%)\n    MMTests Statistics: duration\n    Sys Time Running Test (seconds)             135.68    132.17\n    User+Sys Time Running Test (seconds)         164.2    160.13\n    Total Elapsed Time (seconds)                123.46    120.87\n\nThe overall improvement is small but the System CPU time is much\nimproved and roughly in correlation to what oprofile reported (these\nperformance figures are without profiling so skew is expected).  The\nactual number of page faults is noticeably improved.\n\nFor benchmarks like kernel builds, the overall benefit is marginal but\nthe system CPU time is slightly reduced.\n\nTo test the actual bug the commit fixed I opened two terminals.  The\nfirst ran within a cpuset and continually ran a small program that\nfaulted 100M of anonymous data.  In a second window, the nodemask of the\ncpuset was continually randomised in a loop.\n\nWithout the commit, the program would fail every so often (usually\nwithin 10 seconds) and obviously with the commit everything worked fine.\nWith this patch applied, it also worked fine so the fix should be\nfunctionally equivalent.\n\nSigned-off-by: Mel Gorman \u003cmgorman@suse.de\u003e\nCc: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Christoph Lameter \u003ccl@linux.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "2ba68940c893c8f0bfc8573c041254251bb6aeab",
      "tree": "fa83ebb01d32abd98123fa28f9f6f0b3eaeee25d",
      "parents": [
        "9c2b957db1772ebf942ae7a9346b14eba6c8ca66",
        "600e145882802d6ccbfe2c4aea243d97caeb91a9"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Mar 20 10:31:44 2012 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Mar 20 10:31:44 2012 -0700"
      },
      "message": "Merge branch \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull scheduler changes for v3.4 from Ingo Molnar\n\n* \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (27 commits)\n  printk: Make it compile with !CONFIG_PRINTK\n  sched/x86: Fix overflow in cyc2ns_offset\n  sched: Fix nohz load accounting -- again!\n  sched: Update yield() docs\n  printk/sched: Introduce special printk_sched() for those awkward moments\n  sched/nohz: Correctly initialize \u0027next_balance\u0027 in \u0027nohz\u0027 idle balancer\n  sched: Cleanup cpu_active madness\n  sched: Fix load-balance wreckage\n  sched: Clean up parameter passing of proc_sched_autogroup_set_nice()\n  sched: Ditch per cgroup task lists for load-balancing\n  sched: Rename load-balancing fields\n  sched: Move load-balancing arguments into helper struct\n  sched/rt: Do not submit new work when PI-blocked\n  sched/rt: Prevent idle task boosting\n  sched/wait: Add __wake_up_all_locked() API\n  sched/rt: Document scheduler related skip-resched-check sites\n  sched/rt: Use schedule_preempt_disabled()\n  sched/rt: Add schedule_preempt_disabled()\n  sched/rt: Do not throttle when PI boosting\n  sched/rt: Keep period timer ticking when rt throttling is active\n  ...\n"
    },
    {
      "commit": "0bbfcaff9b2a69c71a95e6902253487ab30cb498",
      "tree": "f422bbfb8ba57909bf6e43f1d560b3f056cc3c61",
      "parents": [
        "5928a2b60cfdbad730f93696acab142d0b607280",
        "e04268b0effc0ceea366c50b3107baad9edadafa"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Mar 20 10:28:56 2012 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Mar 20 10:28:56 2012 -0700"
      },
      "message": "Merge branch \u0027irq-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull irq/core changes for v3.4 from Ingo Molnar\n\n* \u0027irq-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n  genirq: Remove paranoid warnons and bogus fixups\n  genirq: Flush the irq thread on synchronization\n  genirq: Get rid of unnecessary IRQTF_DIED flag\n  genirq: No need to check IRQTF_DIED before stopping a thread handler\n  genirq: Get rid of unnecessary irqaction field in task_struct\n  genirq: Fix incorrect check for forced IRQ thread handler\n  softirq: Reduce invoke_softirq() code duplication\n  genirq: Fix long-term regression in genirq irq_set_irq_type() handling\n  x86-32/irq: Don\u0027t switch to irq stack for a user-mode irq\n"
    },
    {
      "commit": "5928a2b60cfdbad730f93696acab142d0b607280",
      "tree": "49bb21c9219673e61bad7a7c9202c7f25f5fe1be",
      "parents": [
        "5ed59af85077d28875a3a137b21933aaf1b4cd50",
        "bdd4431c8d071491a68a65d9457996f222b5ecd3"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Mar 19 17:12:34 2012 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Mar 20 10:10:18 2012 -0700"
      },
      "message": "Merge branch \u0027core-rcu-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull RCU changes for v3.4 from Ingo Molnar.  The major features of this\nseries are:\n\n - making RCU more aggressive about entering dyntick-idle mode in order\n   to improve energy efficiency\n\n - converting a few more call_rcu()s to kfree_rcu()s\n\n - applying a number of rcutree fixes and cleanups to rcutiny\n\n - removing CONFIG_SMP #ifdefs from treercu\n\n - allowing RCU CPU stall times to be set via sysfs\n\n - adding CPU-stall capability to rcutorture\n\n - adding more RCU-abuse diagnostics\n\n - updating documentation\n\n - fixing yet more issues located by the still-ongoing top-to-bottom\n   inspection of RCU, this time with a special focus on the CPU-hotplug\n   code path.\n\n* \u0027core-rcu-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (48 commits)\n  rcu: Stop spurious warnings from synchronize_sched_expedited\n  rcu: Hold off RCU_FAST_NO_HZ after timer posted\n  rcu: Eliminate softirq-mediated RCU_FAST_NO_HZ idle-entry loop\n  rcu: Add RCU_NONIDLE() for idle-loop RCU read-side critical sections\n  rcu: Allow nesting of rcu_idle_enter() and rcu_idle_exit()\n  rcu: Remove redundant check for rcu_head misalignment\n  PTR_ERR should be called before its argument is cleared.\n  rcu: Convert WARN_ON_ONCE() in rcu_lock_acquire() to lockdep\n  rcu: Trace only after NULL-pointer check\n  rcu: Call out dangers of expedited RCU primitives\n  rcu: Rework detection of use of RCU by offline CPUs\n  lockdep: Add CPU-idle/offline warning to lockdep-RCU splat\n  rcu: No interrupt disabling for rcu_prepare_for_idle()\n  rcu: Move synchronize_sched_expedited() to rcutree.c\n  rcu: Check for illegal use of RCU from offlined CPUs\n  rcu: Update stall-warning documentation\n  rcu: Add CPU-stall capability to rcutorture\n  rcu: Make documentation give more realistic rcutorture duration\n  rcutorture: Permit holding off CPU-hotplug operations during boot\n  rcu: Print scheduling-clock information on RCU CPU stall-warning messages\n  ...\n"
    },
    {
      "commit": "0326f5a94ddea33fa331b2519f4172f4fb387baa",
      "tree": "5485c637754a126c90852e5285842e8462d2826a",
      "parents": [
        "ef15eda98217f5183f457e7a2de8b79555ef908b"
      ],
      "author": {
        "name": "Srikar Dronamraju",
        "email": "srikar@linux.vnet.ibm.com",
        "time": "Tue Mar 13 23:30:11 2012 +0530"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Mar 14 07:41:36 2012 +0100"
      },
      "message": "uprobes/core: Handle breakpoint and singlestep exceptions\n\nUprobes uses exception notifiers to get to know if a thread hit\na breakpoint or a singlestep exception.\n\nWhen a thread hits a uprobe or is singlestepping post a uprobe\nhit, the uprobe exception notifier sets its TIF_UPROBE bit,\nwhich will then be checked on its return to userspace path\n(do_notify_resume() -\u003euprobe_notify_resume()), where the\nconsumers handlers are run (in task context) based on the\ndefined filters.\n\nUprobe hits are thread specific and hence we need to maintain\ninformation about if a task hit a uprobe, what uprobe was hit,\nthe slot where the original instruction was copied for xol so\nthat it can be singlestepped with appropriate fixups.\n\nIn some cases, special care is needed for instructions that are\nexecuted out of line (xol). These are architecture specific\nartefacts, such as handling RIP relative instructions on x86_64.\n\nSince the instruction at which the uprobe was inserted is\nexecuted out of line, architecture specific fixups are added so\nthat the thread continues normal execution in the presence of a\nuprobe.\n\nPostpone the signals until we execute the probed insn.\npost_xol() path does a recalc_sigpending() before return to\nuser-mode, this ensures the signal can\u0027t be lost.\n\nUprobes relies on DIE_DEBUG notification to notify if a\nsinglestep is complete.\n\nAdds x86 specific uprobe exception notifiers and appropriate\nhooks needed to determine a uprobe hit and subsequent post\nprocessing.\n\nAdd requisite x86 fixups for xol for uprobes. Specific cases\nneeding fixups include relative jumps (x86_64), calls, etc.\n\nWhere possible, we check and skip singlestepping the\nbreakpointed instructions. For now we skip single byte as well\nas few multibyte nop instructions. However this can be extended\nto other instructions too.\n\nCredits to Oleg Nesterov for suggestions/patches related to\nsignal, breakpoint, singlestep handling code.\n\nSigned-off-by: Srikar Dronamraju \u003csrikar@linux.vnet.ibm.com\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Ananth N Mavinakayanahalli \u003cananth@in.ibm.com\u003e\nCc: Jim Keniston \u003cjkenisto@linux.vnet.ibm.com\u003e\nCc: Linux-mm \u003clinux-mm@kvack.org\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nCc: Christoph Hellwig \u003chch@infradead.org\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@infradead.org\u003e\nCc: Masami Hiramatsu \u003cmasami.hiramatsu.pt@hitachi.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nLink: http://lkml.kernel.org/r/20120313180011.29771.89027.sendpatchset@srdronam.in.ibm.com\n[ Performed various cleanliness edits ]\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "df8d291f28aa1e8437c8f7816328a6516379c71b",
      "tree": "26ae585aa259584ddd0d9088933547c065c37086",
      "parents": [
        "5234ffb9f74cfa8993d174782bc861dd9b7b5bfb",
        "fde7d9049e55ab85a390be7f415d74c9f62dd0f9"
      ],
      "author": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Tue Mar 13 16:34:48 2012 +0100"
      },
      "committer": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Tue Mar 13 16:35:16 2012 +0100"
      },
      "message": "Merge branch \u0027linus\u0027 into irq/core\n\nReason: Get upstream fixes integrated before further modifications.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n"
    },
    {
      "commit": "47258cf3c4aa5d56e678bafe0dd0d03ddd980b88",
      "tree": "4856f0fb1185ba97f320a7ed6fb63bf136708a42",
      "parents": [
        "c308b56b5398779cd3da0f62ab26b0453494c3d4",
        "fde7d9049e55ab85a390be7f415d74c9f62dd0f9"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Mar 13 16:26:52 2012 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Mar 13 16:26:52 2012 +0100"
      },
      "message": "Merge tag \u0027v3.3-rc7\u0027 into sched/core\n\nMerge reason: merge back final fixes, prepare for the merge window.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "4bcdf1d0b652bc33d52f2322b77463e4dc58abf8",
      "tree": "2a8ecf0f6ef1d0c85a4553cb1d1c7dc74706488a",
      "parents": [
        "540b60e24f3f4781d80e47122f0c4486a03375b8"
      ],
      "author": {
        "name": "Alexander Gordeev",
        "email": "agordeev@redhat.com",
        "time": "Fri Mar 09 14:59:26 2012 +0100"
      },
      "committer": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Fri Mar 09 17:19:08 2012 +0100"
      },
      "message": "genirq: Get rid of unnecessary irqaction field in task_struct\n\nWhen a new thread handler is created, an irqaction is passed to it as\ndata. Not only that irqaction is stored in task_struct by the handler\nfor later use, but also a structure associated with the kernel thread\nkeeps this value as long as the thread exists.\n\nThis fix kicks irqaction out off task_struct. Yes, I introduce new bit\nfield. But it allows not only to eliminate the duplicate, but also\nshortens size of task_struct.\n\nReported-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Alexander Gordeev \u003cagordeev@redhat.com\u003e\nLink: http://lkml.kernel.org/r/20120309135925.GB2114@dhcp-26-207.brq.redhat.com\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n"
    },
    {
      "commit": "6e27f63edbd7ab893258e16500171dd1270a1369",
      "tree": "9c61b7c0dda37052e2285e90f914f8af5ed86f67",
      "parents": [
        "57b59c4a1400fa6c34764eab2e35a8762dc05a09"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Mon Mar 05 14:59:14 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Mar 05 15:49:42 2012 -0800"
      },
      "message": "vfork: kill PF_STARTING\n\nPreviously it was (ab)used by utrace.  Then it was wrongly used by the\nscheduler code.\n\nCurrently it is not used, kill it before it finds the new erroneous user.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "57b59c4a1400fa6c34764eab2e35a8762dc05a09",
      "tree": "e50e6a6f9f7fcd897856e5cdaca3d3caa18377d6",
      "parents": [
        "d68b46fe16ad59b3a5f51ec73daaa5dc06753798"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Mon Mar 05 14:59:13 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Mar 05 15:49:42 2012 -0800"
      },
      "message": "coredump_wait: don\u0027t call complete_vfork_done()\n\nNow that CLONE_VFORK is killable, coredump_wait() no longer needs\ncomplete_vfork_done().  zap_threads() should find and kill all tasks with\nthe same -\u003emm, this includes our parent if -\u003evfork_done is set.\n\nmm_release() becomes the only caller, unexport complete_vfork_done().\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "d68b46fe16ad59b3a5f51ec73daaa5dc06753798",
      "tree": "4bae9ddc5f5bed853d1f0936d05c30e4f7ca924d",
      "parents": [
        "c415c3b47ea2754659d915cca387a20999044163"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Mon Mar 05 14:59:13 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Mar 05 15:49:42 2012 -0800"
      },
      "message": "vfork: make it killable\n\nMake vfork() killable.\n\nChange do_fork(CLONE_VFORK) to do wait_for_completion_killable().  If it\nfails we do not return to the user-mode and never touch the memory shared\nwith our child.\n\nHowever, in this case we should clear child-\u003evfork_done before return, we\nuse task_lock() in do_fork()-\u003ewait_for_vfork_done() and\ncomplete_vfork_done() to serialize with each other.\n\nNote: now that we use task_lock() we don\u0027t really need completion, we\ncould turn task-\u003evfork_done into \"task_struct *wake_up_me\" but this needs\nsome complications.\n\nNOTE: this and the next patches do not affect in-kernel users of\nCLONE_VFORK, kernel threads run with all signals ignored including\nSIGKILL/SIGSTOP.\n\nHowever this is obviously the user-visible change.  Not only a fatal\nsignal can kill the vforking parent, a sub-thread can do execve or\nexit_group() and kill the thread sleeping in vfork().\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "c415c3b47ea2754659d915cca387a20999044163",
      "tree": "c2cb1134f139702e06ade8aecbeff70be7ea727c",
      "parents": [
        "880641bb9da2473e9ecf6c708d993b29928c1b3c"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Mon Mar 05 14:59:13 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Mar 05 15:49:42 2012 -0800"
      },
      "message": "vfork: introduce complete_vfork_done()\n\nNo functional changes.\n\nMove the clear-and-complete-vfork_done code into the new trivial helper,\ncomplete_vfork_done().\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "2e5b5b3a1b7768c89fbfeca18e75f8ee377e924c",
      "tree": "0d6d589e42b7e88464d5edcfa818b3a7e27a93e8",
      "parents": [
        "367456c756a6b84f493ca9cc5b17b1f5d38ef466"
      ],
      "author": {
        "name": "Hiroshi Shimamoto",
        "email": "h-shimamoto@ct.jp.nec.com",
        "time": "Thu Feb 23 17:41:27 2012 +0900"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Mar 02 12:23:49 2012 +0100"
      },
      "message": "sched: Clean up parameter passing of proc_sched_autogroup_set_nice()\n\nPass nice as a value to proc_sched_autogroup_set_nice().\n\nNo side effect is expected, and the variable err will be overwritten with\nthe return value.\n\nSigned-off-by: Hiroshi Shimamoto \u003ch-shimamoto@ct.jp.nec.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/r/4F45FBB7.5090607@ct.jp.nec.com\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "3c7d51843b03a6839e9ec7cda724e54d2319a63a",
      "tree": "df8ac53451a7e519ddb0d349b24e6ba17ea18afb",
      "parents": [
        "1c4dd99bed5f6f70932bf8dacdd54d04a2619778"
      ],
      "author": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Sun Jul 17 20:46:52 2011 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Mar 01 10:46:54 2012 +0100"
      },
      "message": "sched/rt: Do not submit new work when PI-blocked\n\nWhen we are PI-blocked then we want to get things done ASAP.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/n/tip-vw8et3445km5b8mpihf4trae@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "c5491ea779793f977d282754db478157cc409d82",
      "tree": "c110f80101e9e513f5a6f1d2ba81b2934c2408f6",
      "parents": [
        "7abc63b1bd412f7655b62ef3e35c3c11c5134636"
      ],
      "author": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Mon Mar 21 12:09:35 2011 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Mar 01 10:28:03 2012 +0100"
      },
      "message": "sched/rt: Add schedule_preempt_disabled()\n\nAdd helper to get rid of the ever repeating:\n\n    preempt_enable_no_resched();\n    schedule();\n    preempt_disable();\n\npatterns.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/n/tip-wxx7btox7coby6ifv5vzhzgp@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "7e4d960993331e92567f0180e45322a93e6780ba",
      "tree": "4d7444035303fc0b545e88afbd894176344fb2a3",
      "parents": [
        "de5bdff7a72acc281219be2b8edeeca1fd81c542",
        "164974a8f2a482f1abcb027c6d1a89dd79b14297"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Mar 01 10:26:41 2012 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Mar 01 10:26:43 2012 +0100"
      },
      "message": "Merge branch \u0027linus\u0027 into sched/core\n\nMerge reason: we\u0027ll queue up dependent patches.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "de5bdff7a72acc281219be2b8edeeca1fd81c542",
      "tree": "6a528beb1852e2fd7d444b47e8b4cc6e6be31108",
      "parents": [
        "62f6536a630affe3176deb48554d27ee58b65077"
      ],
      "author": {
        "name": "Hiroshi Shimamoto",
        "email": "h-shimamoto@ct.jp.nec.com",
        "time": "Thu Feb 16 14:52:21 2012 +0900"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Feb 22 12:28:29 2012 +0100"
      },
      "message": "sched: Make initial SCHED_RR timeslace DEF_TIMESLICE\n\nCurrent the initial SCHED_RR timeslice of init_task is HZ, which means\n1s, and is not same as the default SCHED_RR timeslice DEF_TIMESLICE.\n\nChange that initial timeslice to the DEF_TIMESLICE.\n\nSigned-off-by: Hiroshi Shimamoto \u003ch-shimamoto@ct.jp.nec.com\u003e\n[ s/DEF_TIMESLICE/RR_TIMESLICE/g ]\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/r/4F3C9995.3010800@ct.jp.nec.com\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "1aa03f1188f7b0b85df2de602b33ee7b6fab8e00",
      "tree": "20ee8fc1aa5bccc8d8cf53c705d9cc766058eaf5",
      "parents": [
        "8762705ad4ac860bb78434409df463d02ac8f027"
      ],
      "author": {
        "name": "Paul E. McKenney",
        "email": "paul.mckenney@linaro.org",
        "time": "Wed Jan 11 17:25:17 2012 -0800"
      },
      "committer": {
        "name": "Paul E. McKenney",
        "email": "paulmck@linux.vnet.ibm.com",
        "time": "Tue Feb 21 09:03:43 2012 -0800"
      },
      "message": "rcu: Simplify unboosting checks\n\nThis is a port of commit #82e78d80 from TREE_PREEMPT_RCU to\nTINY_PREEMPT_RCU.\n\nThis commit uses the fact that current-\u003ercu_boost_mutex is set\nany time that the RCU_READ_UNLOCK_BOOSTED flag is set in the\ncurrent-\u003ercu_read_unlock_special bitmask.  This allows tests of\nthe bit to be changed to tests of the pointer, which in turn allows\nthe RCU_READ_UNLOCK_BOOSTED flag to be eliminated.\n\nPlease note that the check of current-\u003ercu_read_unlock_special need not\nchange because any time that RCU_READ_UNLOCK_BOOSTED was set, so was\nRCU_READ_UNLOCK_BLOCKED.  Therefore, __rcu_read_unlock() can continue\ntesting current-\u003ercu_read_unlock_special for non-zero, as before.\n\nSigned-off-by: Paul E. McKenney \u003cpaul.mckenney@linaro.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n"
    },
    {
      "commit": "9388dc3047a88bedfd867e9ba3e1980c815ac524",
      "tree": "50f30a41607c270b00c04644e069f165a456310a",
      "parents": [
        "ed387b781ea6e14b78f449aa2ee4f270b60b01ac"
      ],
      "author": {
        "name": "Anton Vorontsov",
        "email": "anton.vorontsov@linaro.org",
        "time": "Thu Feb 09 20:45:19 2012 +0400"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sat Feb 11 15:41:33 2012 +0100"
      },
      "message": "sched: Turn lock_task_sighand() into a static inline\n\nIt appears that sparse tool understands static inline functions\nfor context balance checking, so let\u0027s turn the macros into an\ninline func.\n\nThis makes the code a little bit more robust.\n\nSuggested-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Anton Vorontsov \u003canton.vorontsov@linaro.org\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@gmail.com\u003e\nCc: Greg KH \u003cgregkh@linuxfoundation.org\u003e\nCc: Arve \u003carve@android.com\u003e\nCc: San Mehat \u003csan@google.com\u003e\nCc: Colin Cross \u003cccross@android.com\u003e\nCc: Eric W. Biederman \u003cebiederm@xmission.com\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: kernel-team@android.com\nCc: linaro-kernel@lists.linaro.org\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nLink: http://lkml.kernel.org/r/20120209164519.GA10266@oksana.dev.rtsoft.ru\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "8cdb878dcb359fd1137e9abdee9322f5e9bcfdf8",
      "tree": "146afc01f3c1d7cbc944328484d077032bc53bfd",
      "parents": [
        "24b36da33c64368775f4ef9386d44dce1d2bc8cf"
      ],
      "author": {
        "name": "Christopher Yeoh",
        "email": "cyeoh@au1.ibm.com",
        "time": "Thu Feb 02 11:34:09 2012 +1030"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Feb 02 12:55:17 2012 -0800"
      },
      "message": "Fix race in process_vm_rw_core\n\nThis fixes the race in process_vm_core found by Oleg (see\n\n  http://article.gmane.org/gmane.linux.kernel/1235667/\n\nfor details).\n\nThis has been updated since I last sent it as the creation of the new\nmm_access() function did almost exactly the same thing as parts of the\nprevious version of this patch did.\n\nIn order to use mm_access() even when /proc isn\u0027t enabled, we move it to\nkernel/fork.c where other related process mm access functions already\nare.\n\nSigned-off-by: Chris Yeoh \u003cyeohc@au1.ibm.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "4ec4412e1e91f44a3dcb97b6c9172a13fc78bac9",
      "tree": "a98f635907975c2f14c01c24418e102337250b8d",
      "parents": [
        "39be350127ec60a078edffe5b4915dafba4ba514"
      ],
      "author": {
        "name": "Vincent Guittot",
        "email": "vincent.guittot@linaro.org",
        "time": "Mon Dec 12 20:21:08 2011 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Jan 27 13:28:49 2012 +0100"
      },
      "message": "sched: Ensure cpu_power periodic update\n\nWith a lot of small tasks, the softirq sched is nearly never called\nwhen no_hz is enabled. In this case load_balance() is mainly called\nwith the newly_idle mode which doesn\u0027t update the cpu_power.\n\nAdd a next_update field which ensure a maximum update period when\nthere is short activity.\n\nHaving stale cpu_power information can skew the load-balancing\ndecisions, this is cured by the guaranteed update.\n\nSigned-off-by: Vincent Guittot \u003cvincent.guittot@linaro.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/r/1323717668-2143-1-git-send-email-vincent.guittot@linaro.org\n"
    },
    {
      "commit": "39be350127ec60a078edffe5b4915dafba4ba514",
      "tree": "9b1ad6ee75c3b5842434b697b96ccdfbe1a40a2f",
      "parents": [
        "cb297a3e433dbdcf7ad81e0564e7b804c941ff0d"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Thu Jan 26 12:44:34 2012 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Jan 27 13:28:48 2012 +0100"
      },
      "message": "sched, block: Unify cache detection\n\nThe block layer has some code trying to determine if two CPUs share a\ncache, the scheduler has a similar function. Expose the function used\nby the scheduler and make the block layer use it, thereby removing the\nblock layers usage of CONFIG_SCHED* and topology bits.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nAcked-by: Jens Axboe \u003caxboe@kernel.dk\u003e\nLink: http://lkml.kernel.org/r/1327579450.2446.95.camel@twins\n"
    },
    {
      "commit": "2437dcbf555bff04e4ee8b8dba4587f946c1cd3d",
      "tree": "f04f3ed779c25caa933744d2d5965ca4e297f05d",
      "parents": [
        "0dbfe8ddaaab9fe5bc8672c064d3ede6cd66201a",
        "b64b223aed5f8aeeb6c046f1b050a8f976b87de0"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Jan 26 12:45:41 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Jan 26 12:45:41 2012 -0800"
      },
      "message": "Merge branch \u0027core-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\n* \u0027core-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n  rcu: Add missing __cpuinit annotation in rcutorture code\n  sched: Add \"const\" to is_idle_task() parameter\n  rcu: Make rcutorture bool parameters really bool (core code)\n  memblock: Fix alloc failure due to dumb underflow protection in memblock_find_in_range_node()\n"
    },
    {
      "commit": "fa757281a08799fd6c0f7ec6f111d1cd66afc97b",
      "tree": "664f8728e55e3d37ca8eb3c6c9087d2da9860463",
      "parents": [
        "2f6c76aa5f0fb53059730c628ac59ef62a14ed7a"
      ],
      "author": {
        "name": "Randy Dunlap",
        "email": "rdunlap@xenotime.net",
        "time": "Sat Jan 21 11:03:13 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jan 23 08:44:54 2012 -0800"
      },
      "message": "kernel-doc: fix kernel-doc warnings in sched\n\nFix new kernel-doc notation warnings:\n\nWarning(include/linux/sched.h:2094): No description found for parameter \u0027p\u0027\nWarning(include/linux/sched.h:2094): Excess function parameter \u0027tsk\u0027 description in \u0027is_idle_task\u0027\nWarning(kernel/sched/cpupri.c:139): No description found for parameter \u0027newpri\u0027\nWarning(kernel/sched/cpupri.c:139): Excess function parameter \u0027pri\u0027 description in \u0027cpupri_set\u0027\nWarning(kernel/sched/cpupri.c:208): Excess function parameter \u0027bootmem\u0027 description in \u0027cpupri_init\u0027\n\nSigned-off-by: Randy Dunlap \u003crdunlap@xenotime.net\u003e\nCc:\tIngo Molnar \u003cmingo@elte.hu\u003e\nCc:\tPeter Zijlstra \u003cpeterz@infradead.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "b64b223aed5f8aeeb6c046f1b050a8f976b87de0",
      "tree": "f4ce305aaae5fa04f55ad04a3b9ee501158decde",
      "parents": [
        "5d53cb27d849c899136c048ec84c940ac449494b",
        "4410030646be072b82ec1892ad5cc7d91af384d8"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Jan 17 09:44:17 2012 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Jan 17 09:44:17 2012 +0100"
      },
      "message": "Merge branch \u0027rcu/urgent\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/urgent\n"
    },
    {
      "commit": "7061ca3b6c99fc78115560b9a10227c8c5fafc45",
      "tree": "bdc970631a678cefa0902b42575c3e28b2594527",
      "parents": [
        "d8e8ed95cda1dfd6813588333d36552935eba4a1"
      ],
      "author": {
        "name": "Paul E. McKenney",
        "email": "paulmck@linux.vnet.ibm.com",
        "time": "Tue Dec 20 08:20:46 2011 -0800"
      },
      "committer": {
        "name": "Paul E. McKenney",
        "email": "paulmck@linux.vnet.ibm.com",
        "time": "Mon Jan 16 09:44:00 2012 -0800"
      },
      "message": "sched: Add \"const\" to is_idle_task() parameter\n\nThis patch fixes a build warning in -next due to a const pointer being\npassed to is_idle_task().  Because is_idle_task() does not modify anything,\nthis commit adds the \"const\" to is_idle_task()\u0027s argument declaration.\n\nReported-by: Stephen Rothwell \u003csfr@canb.auug.org.au\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n"
    },
    {
      "commit": "9402c95f34a66e81eba473a2f7267bbae5a1dee2",
      "tree": "c46628e702d625a737fedbd9de88138a94c93d1f",
      "parents": [
        "80bf007f20b16272f210e0803f739f5606cff59d"
      ],
      "author": {
        "name": "Joe Perches",
        "email": "joe@perches.com",
        "time": "Thu Jan 12 17:17:17 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Jan 12 20:13:03 2012 -0800"
      },
      "message": "treewide: remove useless NORET_TYPE macro and uses\n\nIt\u0027s a very old and now unused prototype marking so just delete it.\n\nNeaten panic pointer argument style to keep checkpatch quiet.\n\nSigned-off-by: Joe Perches \u003cjoe@perches.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Haavard Skinnemoen \u003chskinnemoen@gmail.com\u003e\nCc: Hans-Christian Egtvedt \u003cegtvedt@samfundet.no\u003e\nCc: Tony Luck \u003ctony.luck@intel.com\u003e\nCc: Fenghua Yu \u003cfenghua.yu@intel.com\u003e\nAcked-by: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nAcked-by: Ralf Baechle \u003cralf@linux-mips.org\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nCc: Chris Metcalf \u003ccmetcalf@tilera.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "001a541ea9163ace5e8243ee0e907ad80a4c0ec2",
      "tree": "a76225046369c440de93739add9823f5ea060245",
      "parents": [
        "40ba587923ae67090d9f141c1d3c951be5c1420e",
        "bc31b86a5923fad5f3fbb6192f767f410241ba27"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Jan 10 16:59:59 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Jan 10 16:59:59 2012 -0800"
      },
      "message": "Merge branch \u0027writeback-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux\n\n* \u0027writeback-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux:\n  writeback: move MIN_WRITEBACK_PAGES to fs-writeback.c\n  writeback: balanced_rate cannot exceed write bandwidth\n  writeback: do strict bdi dirty_exceeded\n  writeback: avoid tiny dirty poll intervals\n  writeback: max, min and target dirty pause time\n  writeback: dirty ratelimit - think time compensation\n  btrfs: fix dirtied pages accounting on sub-page writes\n  writeback: fix dirtied pages accounting on redirty\n  writeback: fix dirtied pages accounting on sub-page writes\n  writeback: charge leaked page dirties to active tasks\n  writeback: Include all dirty inodes in background writeback\n"
    },
    {
      "commit": "db0c2bf69aa095d4a6de7b1145f29fe9a7c0f6a3",
      "tree": "8f38957c01b18edddd44d49ecc3beeac08a20b4e",
      "parents": [
        "ac69e0928054ff29a5049902fb477f9c7605c773",
        "0d19ea866562e46989412a0676412fa0983c9ce7"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jan 09 12:59:24 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jan 09 12:59:24 2012 -0800"
      },
      "message": "Merge branch \u0027for-3.3\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup\n\n* \u0027for-3.3\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (21 commits)\n  cgroup: fix to allow mounting a hierarchy by name\n  cgroup: move assignement out of condition in cgroup_attach_proc()\n  cgroup: Remove task_lock() from cgroup_post_fork()\n  cgroup: add sparse annotation to cgroup_iter_start() and cgroup_iter_end()\n  cgroup: mark cgroup_rmdir_waitq and cgroup_attach_proc() as static\n  cgroup: only need to check oldcgrp\u003d\u003dnewgrp once\n  cgroup: remove redundant get/put of task struct\n  cgroup: remove redundant get/put of old css_set from migrate\n  cgroup: Remove unnecessary task_lock before fetching css_set on migration\n  cgroup: Drop task_lock(parent) on cgroup_fork()\n  cgroups: remove redundant get/put of css_set from css_set_check_fetched()\n  resource cgroups: remove bogus cast\n  cgroup: kill subsys-\u003ecan_attach_task(), pre_attach() and attach_task()\n  cgroup, cpuset: don\u0027t use ss-\u003epre_attach()\n  cgroup: don\u0027t use subsys-\u003ecan_attach_task() or -\u003eattach_task()\n  cgroup: introduce cgroup_taskset and use it in subsys-\u003ecan_attach(), cancel_attach() and attach()\n  cgroup: improve old cgroup handling in cgroup_attach_proc()\n  cgroup: always lock threadgroup during migration\n  threadgroup: extend threadgroup_lock() to cover exit and exec\n  threadgroup: rename signal-\u003ethreadgroup_fork_lock to -\u003egroup_rwsem\n  ...\n\nFix up conflict in kernel/cgroup.c due to commit e0197aae59e5: \"cgroups:\nfix a css_set not found bug in cgroup_attach_proc\" that already\nmentioned that the bug is fixed (differently) in Tejun\u0027s cgroup\npatchset. This one, in other words.\n"
    },
    {
      "commit": "eb59c505f8a5906ad2e053d14fab50eb8574fd6f",
      "tree": "c6e875adc12b481b916e847e8f80b8881a0fb02c",
      "parents": [
        "1619ed8f60959829d070d8f39cd2f8ca0e7135ce",
        "c233523b3d392e530033a7587d7970dc62a02361"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun Jan 08 13:10:57 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun Jan 08 13:10:57 2012 -0800"
      },
      "message": "Merge branch \u0027pm-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm\n\n* \u0027pm-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (76 commits)\n  PM / Hibernate: Implement compat_ioctl for /dev/snapshot\n  PM / Freezer: fix return value of freezable_schedule_timeout_killable()\n  PM / shmobile: Allow the A4R domain to be turned off at run time\n  PM / input / touchscreen: Make st1232 use device PM QoS constraints\n  PM / QoS: Introduce dev_pm_qos_add_ancestor_request()\n  PM / shmobile: Remove the stay_on flag from SH7372\u0027s PM domains\n  PM / shmobile: Don\u0027t include SH7372\u0027s INTCS in syscore suspend/resume\n  PM / shmobile: Add support for the sh7372 A4S power domain / sleep mode\n  PM: Drop generic_subsys_pm_ops\n  PM / Sleep: Remove forward-only callbacks from AMBA bus type\n  PM / Sleep: Remove forward-only callbacks from platform bus type\n  PM: Run the driver callback directly if the subsystem one is not there\n  PM / Sleep: Make pm_op() and pm_noirq_op() return callback pointers\n  PM/Devfreq: Add Exynos4-bus device DVFS driver for Exynos4210/4212/4412.\n  PM / Sleep: Merge internal functions in generic_ops.c\n  PM / Sleep: Simplify generic system suspend callbacks\n  PM / Hibernate: Remove deprecated hibernation snapshot ioctls\n  PM / Sleep: Fix freezer failures due to racy usermodehelper_is_disabled()\n  ARM: S3C64XX: Implement basic power domain support\n  PM / shmobile: Use common always on power domain governor\n  ...\n\nFix up trivial conflict in fs/xfs/xfs_buf.c due to removal of unused\nXBT_FORCE_SLEEP bit\n"
    },
    {
      "commit": "0db49b72bce26341274b74fd968501489a361ae3",
      "tree": "cdb076827aefb38d719d4c42f8ef291c36072fa8",
      "parents": [
        "35b740e4662ef386f0c60e1b60aaf5b44db9914c",
        "1ac9bc6943edf7d181b4b1cc734981350d4f6bae"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Jan 06 08:33:28 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Jan 06 08:44:54 2012 -0800"
      },
      "message": "Merge branch \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\n* \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (40 commits)\n  sched/tracing: Add a new tracepoint for sleeptime\n  sched: Disable scheduler warnings during oopses\n  sched: Fix cgroup movement of waking process\n  sched: Fix cgroup movement of newly created process\n  sched: Fix cgroup movement of forking process\n  sched: Remove cfs bandwidth period check in tg_set_cfs_period()\n  sched: Fix load-balance lock-breaking\n  sched: Replace all_pinned with a generic flags field\n  sched: Only queue remote wakeups when crossing cache boundaries\n  sched: Add missing rcu_dereference() around -\u003ereal_parent usage\n  [S390] fix cputime overflow in uptime_proc_show\n  [S390] cputime: add sparse checking and cleanup\n  sched: Mark parent and real_parent as __rcu\n  sched, nohz: Fix missing RCU read lock\n  sched, nohz: Set the NOHZ_BALANCE_KICK flag for idle load balancer\n  sched, nohz: Fix the idle cpu check in nohz_idle_balance\n  sched: Use jump_labels for sched_feat\n  sched/accounting: Fix parameter passing in task_group_account_field\n  sched/accounting: Fix user/system tick double accounting\n  sched/accounting: Re-use scheduler statistics for the root cgroup\n  ...\n\nFix up conflicts in\n - arch/ia64/include/asm/cputime.h, include/asm-generic/cputime.h\n\tusecs_to_cputime64() vs the sparse cleanups\n - kernel/sched/fair.c, kernel/time/tick-sched.c\n\tscheduler changes in multiple branches\n"
    },
    {
      "commit": "612ef28a045efadb3a98d4492ead7806a146485d",
      "tree": "05621c87b37e91c27b06d450d76adffe97ce9666",
      "parents": [
        "c3e0ef9a298e028a82ada28101ccd5cf64d209ee",
        "07cde2608a3b5c66515363f1b53623b1536b9785"
      ],
      "author": {
        "name": "Martin Schwidefsky",
        "email": "schwidefsky@de.ibm.com",
        "time": "Mon Dec 19 19:23:15 2011 +0100"
      },
      "committer": {
        "name": "Martin Schwidefsky",
        "email": "schwidefsky@de.ibm.com",
        "time": "Mon Dec 19 19:23:15 2011 +0100"
      },
      "message": "Merge branch \u0027sched/core\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into cputime-tip\n\nConflicts:\n\tdrivers/cpufreq/cpufreq_conservative.c\n\tdrivers/cpufreq/cpufreq_ondemand.c\n\tdrivers/macintosh/rack-meter.c\n\tfs/proc/stat.c\n\tfs/proc/uptime.c\n\tkernel/sched/core.c\n"
    },
    {
      "commit": "83712358ba0a1497ce59a4f84ce4dd0f803fe6fc",
      "tree": "d17ab27a7bff50616e3b63ad137c004d9ccfbcb0",
      "parents": [
        "32c7f202a4801252a0f3578807b75a961f792870"
      ],
      "author": {
        "name": "Wu Fengguang",
        "email": "fengguang.wu@intel.com",
        "time": "Sat Jun 11 19:25:42 2011 -0600"
      },
      "committer": {
        "name": "Wu Fengguang",
        "email": "fengguang.wu@intel.com",
        "time": "Sun Dec 18 14:20:27 2011 +0800"
      },
      "message": "writeback: dirty ratelimit - think time compensation\n\nCompensate the task\u0027s think time when computing the final pause time,\nso that -\u003edirty_ratelimit can be executed accurately.\n\n        think time :\u003d time spend outside of balance_dirty_pages()\n\nIn the rare case that the task slept longer than the 200ms period time\n(result in negative pause time), the sleep time will be compensated in\nthe following periods, too, if it\u0027s less than 1 second.\n\nAccumulated errors are carefully avoided as long as the max pause area\nis not hitted.\n\nPseudo code:\n\n        period \u003d pages_dirtied / task_ratelimit;\n        think \u003d jiffies - dirty_paused_when;\n        pause \u003d period - think;\n\n1) normal case: period \u003e think\n\n        pause \u003d period - think\n        dirty_paused_when \u003d jiffies + pause\n        nr_dirtied \u003d 0\n\n                             period time\n              |\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003e|\n                  think time      pause time\n              |\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003e|\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003e|\n        ------|----------------|---------------|------------------------\n        dirty_paused_when   jiffies\n\n2) no pause case: period \u003c\u003d think\n\n        don\u0027t pause; reduce future pause time by:\n        dirty_paused_when +\u003d period\n        nr_dirtied \u003d 0\n\n                           period time\n              |\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003e|\n                                  think time\n              |\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003e|\n        ------|--------------------------------+-------------------|----\n        dirty_paused_when                                       jiffies\n\nAcked-by: Jan Kara \u003cjack@suse.cz\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\n"
    },
    {
      "commit": "648616343cdbe904c585a6c12e323d3b3c72e46f",
      "tree": "514bce1b52663db4ab5662b637c764cf3c2ed1eb",
      "parents": [
        "55b02d2f4445ad625213817a1736bf2884d32547"
      ],
      "author": {
        "name": "Martin Schwidefsky",
        "email": "schwidefsky@de.ibm.com",
        "time": "Thu Dec 15 14:56:09 2011 +0100"
      },
      "committer": {
        "name": "Martin Schwidefsky",
        "email": "schwidefsky@de.ibm.com",
        "time": "Thu Dec 15 14:56:19 2011 +0100"
      },
      "message": "[S390] cputime: add sparse checking and cleanup\n\nMake cputime_t and cputime64_t nocast to enable sparse checking to\ndetect incorrect use of cputime. Drop the cputime macros for simple\nscalar operations. The conversion macros are still needed.\n\nSigned-off-by: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\n"
    },
    {
      "commit": "abd63bc3a0f65ae9d85bc3b1bb067d3e3c2b2cc2",
      "tree": "5c40dd25121062a186d203fb9343940de740be74",
      "parents": [
        "6a54aebf6978e9f296a4d3da3e40af425163c22e"
      ],
      "author": {
        "name": "Kees Cook",
        "email": "keescook@chromium.org",
        "time": "Wed Dec 14 14:39:26 2011 -0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Dec 15 08:21:59 2011 +0100"
      },
      "message": "sched: Mark parent and real_parent as __rcu\n\nThe parent and real_parent pointers should be considered __rcu,\nsince they should be held under either tasklist_lock or\nrcu_read_lock.\n\nSigned-off-by: Kees Cook \u003ckeescook@chromium.org\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nLink: http://lkml.kernel.org/r/20111214223925.GA27578@www.outflux.net\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "6a54aebf6978e9f296a4d3da3e40af425163c22e",
      "tree": "8217c7114db02d8b69c22fc44880749426949bc3",
      "parents": [
        "067491b7313c41f49607fce782d29344d1472587",
        "dc47ce90c3a822cd7c9e9339fe4d5f61dcb26b50"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Dec 15 08:21:21 2011 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Dec 15 08:21:30 2011 +0100"
      },
      "message": "Merge commit \u0027v3.2-rc5\u0027 into sched/core\n\nMerge reason: Pick up the latest fixes.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "77e4ef99d1c596a31747668e5fd837f77b6349b6",
      "tree": "b9dcc8d73f9febf6a18edc0b2efa3ecddc2a7a35",
      "parents": [
        "257058ae2b971646b96ab3a15605ac69186e562a"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Mon Dec 12 18:12:21 2011 -0800"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Mon Dec 12 18:12:21 2011 -0800"
      },
      "message": "threadgroup: extend threadgroup_lock() to cover exit and exec\n\nthreadgroup_lock() protected only protected against new addition to\nthe threadgroup, which was inherently somewhat incomplete and\nproblematic for its only user cgroup.  On-going migration could race\nagainst exec and exit leading to interesting problems - the symmetry\nbetween various attach methods, task exiting during method execution,\n-\u003eexit() racing against attach methods, migrating task switching basic\nproperties during exec and so on.\n\nThis patch extends threadgroup_lock() such that it protects against\nall three threadgroup altering operations - fork, exit and exec.  For\nexit, threadgroup_change_begin/end() calls are added to exit_signals\naround assertion of PF_EXITING.  For exec, threadgroup_[un]lock() are\nupdated to also grab and release cred_guard_mutex.\n\nWith this change, threadgroup_lock() guarantees that the target\nthreadgroup will remain stable - no new task will be added, no new\nPF_EXITING will be set and exec won\u0027t happen.\n\nThe next patch will update cgroup so that it can take full advantage\nof this change.\n\n-v2: beefed up comment as suggested by Frederic.\n\n-v3: narrowed scope of protection in exit path as suggested by\n     Frederic.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Paul Menage \u003cpaul@paulmenage.org\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "257058ae2b971646b96ab3a15605ac69186e562a",
      "tree": "b8a462e64c4bb4b43dcc6c9d05b194f9c747c91d",
      "parents": [
        "e25e2cbb4c6679bed5f52fb0f2cc381688297901"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Mon Dec 12 18:12:21 2011 -0800"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Mon Dec 12 18:12:21 2011 -0800"
      },
      "message": "threadgroup: rename signal-\u003ethreadgroup_fork_lock to -\u003egroup_rwsem\n\nMake the following renames to prepare for extension of threadgroup\nlocking.\n\n* s/signal-\u003ethreadgroup_fork_lock/signal-\u003egroup_rwsem/\n* s/threadgroup_fork_read_lock()/threadgroup_change_begin()/\n* s/threadgroup_fork_read_unlock()/threadgroup_change_end()/\n* s/threadgroup_fork_write_lock()/threadgroup_lock()/\n* s/threadgroup_fork_write_unlock()/threadgroup_unlock()/\n\nThis patch doesn\u0027t cause any behavior change.\n\n-v2: Rename threadgroup_change_done() to threadgroup_change_end() per\n     KAMEZAWA\u0027s suggestion.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Paul Menage \u003cpaul@paulmenage.org\u003e\n"
    },
    {
      "commit": "c4f3060843506ba6d473ab9a0afe5bd5dc93a00d",
      "tree": "3fa6ed6ea9288daa19426a5402d5bcb08f6edcbe",
      "parents": [
        "bb3bf7052de520f2d21a1275e95fac7a84d89e4c"
      ],
      "author": {
        "name": "Paul E. McKenney",
        "email": "paul.mckenney@linaro.org",
        "time": "Thu Nov 10 12:41:56 2011 -0800"
      },
      "committer": {
        "name": "Paul E. McKenney",
        "email": "paulmck@linux.vnet.ibm.com",
        "time": "Sun Dec 11 10:31:47 2011 -0800"
      },
      "message": "sched: Add is_idle_task() to handle invalidated uses of idle_cpu()\n\nCommit 908a3283 (Fix idle_cpu()) invalidated some uses of idle_cpu(),\nwhich used to say whether or not the CPU was running the idle task,\nbut now instead says whether or not the CPU is running the idle task\nin the absence of pending wakeups.  Although this new implementation\ngives a better answer to the question \"is this CPU idle?\", it also\ninvalidates other uses that were made of idle_cpu().\n\nThis commit therefore introduces a new is_idle_task() API member\nthat determines whether or not the specified task is one of the\nidle tasks, allowing open-coded \"-\u003epid \u003d\u003d 0\" sequences to be replaced\nby something more meaningful.\n\nSuggested-by: Josh Triplett \u003cjosh@joshtriplett.org\u003e\nSuggested-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaul.mckenney@linaro.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n"
    },
    {
      "commit": "fdaabd800bdd60652a448994eeb77442180db6c0",
      "tree": "c66947d9a7ffac9f66395354878ba0184d010f9e",
      "parents": [
        "44252e421ad81e711c5a9db158fad7f433f70665"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Tue Dec 06 12:47:55 2011 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Dec 06 20:51:18 2011 +0100"
      },
      "message": "sched: Fix compile error for UP,!NOHZ\n\nCommit 69e1e811 (\"sched, nohz: Track nr_busy_cpus in the\nsched_group_power\") messed up the static inline function definition.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Suresh Siddha \u003csuresh.b.siddha@intel.com\u003e\nLink: http://lkml.kernel.org/n/tip-abjah8ctq5qrjjtdiabe8lph@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "69e1e811dcc436a6b129dbef273ad9ec22d095ce",
      "tree": "f07179af4989178733727683796927948db9059a",
      "parents": [
        "1c792db7f7957e2e34b9a164f08200e36a25dfd0"
      ],
      "author": {
        "name": "Suresh Siddha",
        "email": "suresh.b.siddha@intel.com",
        "time": "Thu Dec 01 17:07:33 2011 -0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Dec 06 09:06:32 2011 +0100"
      },
      "message": "sched, nohz: Track nr_busy_cpus in the sched_group_power\n\nIntroduce nr_busy_cpus in the struct sched_group_power [Not in sched_group\nbecause sched groups are duplicated for the SD_OVERLAP scheduler domain]\nand for each cpu that enters and exits idle, this parameter will\nbe updated in each scheduler group of the scheduler domain that this cpu\nbelongs to.\n\nTo avoid the frequent update of this state as the cpu enters\nand exits idle, the update of the stat during idle exit is\ndelayed to the first timer tick that happens after the cpu becomes busy.\nThis is done using NOHZ_IDLE flag in the struct rq\u0027s nohz_flags.\n\nSigned-off-by: Suresh Siddha \u003csuresh.b.siddha@intel.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nLink: http://lkml.kernel.org/r/20111202010832.555984323@sbsiddha-desk.sc.intel.com\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "986b11c3ee9e0eace25fe74a502205f7fe8c179b",
      "tree": "2271bc519eac458fd92799f5731e2ef604f69341",
      "parents": [
        "bb58dd5d1ffad6c2d21c69698ba766dad4ae54e6",
        "24b7ead3fb0bae267c2ee50898eb4c13aedd1e9f"
      ],
      "author": {
        "name": "Rafael J. Wysocki",
        "email": "rjw@sisk.pl",
        "time": "Wed Nov 23 21:09:02 2011 +0100"
      },
      "committer": {
        "name": "Rafael J. Wysocki",
        "email": "rjw@sisk.pl",
        "time": "Wed Nov 23 21:09:02 2011 +0100"
      },
      "message": "Merge branch \u0027pm-freezer\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc into pm-freezer\n\n* \u0027pm-freezer\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc: (24 commits)\n  freezer: fix wait_event_freezable/__thaw_task races\n  freezer: kill unused set_freezable_with_signal()\n  dmatest: don\u0027t use set_freezable_with_signal()\n  usb_storage: don\u0027t use set_freezable_with_signal()\n  freezer: remove unused @sig_only from freeze_task()\n  freezer: use lock_task_sighand() in fake_signal_wake_up()\n  freezer: restructure __refrigerator()\n  freezer: fix set_freezable[_with_signal]() race\n  freezer: remove should_send_signal() and update frozen()\n  freezer: remove now unused TIF_FREEZE\n  freezer: make freezing() test freeze conditions in effect instead of TIF_FREEZE\n  cgroup_freezer: prepare for removal of TIF_FREEZE\n  freezer: clean up freeze_processes() failure path\n  freezer: kill PF_FREEZING\n  freezer: test freezable conditions while holding freezer_lock\n  freezer: make freezing indicate freeze condition in effect\n  freezer: use dedicated lock instead of task_lock() + memory barrier\n  freezer: don\u0027t distinguish nosig tasks on thaw\n  freezer: remove racy clear_freeze_flag() and set PF_NOFREEZE on dead tasks\n  freezer: rename thaw_process() to __thaw_task() and simplify the implementation\n  ...\n"
    },
    {
      "commit": "34b087e48367c252e343c2f8de65676a78af1e4a",
      "tree": "fbe94bad0a3073c6f4231752fba99c6bc8702277",
      "parents": [
        "adfa543e7314b36ac55a40019977de6e47946dd7"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Wed Nov 23 09:28:17 2011 -0800"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Wed Nov 23 09:28:17 2011 -0800"
      },
      "message": "freezer: kill unused set_freezable_with_signal()\n\nThere\u0027s no in-kernel user of set_freezable_with_signal() left.  Mixing\nTIF_SIGPENDING with kernel threads can lead to nasty corner cases as\nkernel threads never travel signal delivery path on their own.\n\ne.g. the current implementation is buggy in the cancelation path of\n__thaw_task().  It calls recalc_sigpending_and_wake() in an attempt to\nclear TIF_SIGPENDING but the function never clears it regardless of\nsigpending state.  This means that signallable freezable kthreads may\ncontinue executing with !freezing() \u0026\u0026 stuck TIF_SIGPENDING, which can\nbe troublesome.\n\nThis patch removes set_freezable_with_signal() along with\nPF_FREEZER_NOSIG and recalc_sigpending*() calls in freezer.  User\ntasks get TIF_SIGPENDING, kernel tasks get woken up and the spurious\nsigpending is dealt with in the usual signal delivery path.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nAcked-by: Oleg Nesterov \u003coleg@redhat.com\u003e\n"
    },
    {
      "commit": "376fede80e74d98b49d1ba9ac18f23c9fd026ddd",
      "tree": "78a48a9565efabba585dd9253c6f2c12966a995e",
      "parents": [
        "85f1d476653f52c97ca75466b2494e67c1cbd25d"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Mon Nov 21 12:32:24 2011 -0800"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Mon Nov 21 12:32:24 2011 -0800"
      },
      "message": "freezer: kill PF_FREEZING\n\nWith the previous changes, there\u0027s no meaningful difference between\nPF_FREEZING and PF_FROZEN.  Remove PF_FREEZING and use PF_FROZEN\ninstead in task_contributes_to_load().\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n"
    },
    {
      "commit": "468e6a20afaccb67e2a7d7f60d301f90e1c6f301",
      "tree": "5558e92e85decd0fa0bb95ed6e637e1f68ea2fe1",
      "parents": [
        "1df647197c5b8aacaeb58592cba9a1df322c9000"
      ],
      "author": {
        "name": "Wu Fengguang",
        "email": "fengguang.wu@intel.com",
        "time": "Wed Sep 07 10:41:32 2011 -0600"
      },
      "committer": {
        "name": "Wu Fengguang",
        "email": "fengguang.wu@intel.com",
        "time": "Thu Nov 17 20:49:06 2011 +0800"
      },
      "message": "writeback: remove vm_dirties and task-\u003edirties\n\nThey are not used any more.\n\nSigned-off-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\n"
    },
    {
      "commit": "029632fbb7b7c9d85063cc9eb470de6c54873df3",
      "tree": "511303f0fa32f997c4b2f68364b032555b6a642e",
      "parents": [
        "60686317da05049385eae86e44c710cde535f95f"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Tue Oct 25 10:00:11 2011 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Nov 17 12:20:19 2011 +0100"
      },
      "message": "sched: Make separate sched*.c translation units\n\nSince once needs to do something at conferences and fixing compile\nwarnings doesn\u0027t actually require much if any attention I decided\nto break up the sched.c #include \"*.c\" fest.\n\nThis further modularizes the scheduler code.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/n/tip-x0fcd3mnp8f9c99grcpewmhi@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "208bca0860406d16398145ddd950036a737c3c9d",
      "tree": "7797a16c17d8bd155120126fa7976727fc6de013",
      "parents": [
        "6aad3738f6a79fd0ca480eaceefe064cc471f6eb",
        "0e175a1835ffc979e55787774e58ec79e41957d7"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun Nov 06 19:02:23 2011 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun Nov 06 19:02:23 2011 -0800"
      },
      "message": "Merge branch \u0027writeback-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux\n\n* \u0027writeback-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux:\n  writeback: Add a \u0027reason\u0027 to wb_writeback_work\n  writeback: send work item to queue_io, move_expired_inodes\n  writeback: trace event balance_dirty_pages\n  writeback: trace event bdi_dirty_ratelimit\n  writeback: fix ppc compile warnings on do_div(long long, unsigned long)\n  writeback: per-bdi background threshold\n  writeback: dirty position control - bdi reserve area\n  writeback: control dirty pause time\n  writeback: limit max dirty pause time\n  writeback: IO-less balance_dirty_pages()\n  writeback: per task dirty rate limit\n  writeback: stabilize bdi-\u003edirty_ratelimit\n  writeback: dirty rate control\n  writeback: add bg_threshold parameter to __bdi_update_bandwidth()\n  writeback: dirty position control\n  writeback: account per-bdi accumulated dirtied pages\n"
    },
    {
      "commit": "8a4a8918ed6e4a361f4df19f199bbc2d0a89a46c",
      "tree": "d76974986aaaa8549baf2d6a106fa6cb60d64b88",
      "parents": [
        "8686a0e200419322654a75155e2e6f80346a1297",
        "540f41edc15473ca3b2876de72646546ae101374"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Oct 26 17:08:43 2011 +0200"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Oct 26 17:08:43 2011 +0200"
      },
      "message": "Merge branch \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\n* \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (46 commits)\n  llist: Add back llist_add_batch() and llist_del_first() prototypes\n  sched: Don\u0027t use tasklist_lock for debug prints\n  sched: Warn on rt throttling\n  sched: Unify the -\u003ecpus_allowed mask copy\n  sched: Wrap scheduler p-\u003ecpus_allowed access\n  sched: Request for idle balance during nohz idle load balance\n  sched: Use resched IPI to kick off the nohz idle balance\n  sched: Fix idle_cpu()\n  llist: Remove cpu_relax() usage in cmpxchg loops\n  sched: Convert to struct llist\n  llist: Add llist_next()\n  irq_work: Use llist in the struct irq_work logic\n  llist: Return whether list is empty before adding in llist_add()\n  llist: Move cpu_relax() to after the cmpxchg()\n  llist: Remove the platform-dependent NMI checks\n  llist: Make some llist functions inline\n  sched, tracing: Show PREEMPT_ACTIVE state in trace_sched_switch\n  sched: Remove redundant test in check_preempt_tick()\n  sched: Add documentation for bandwidth control\n  sched: Return unused runtime on group dequeue\n  ...\n"
    },
    {
      "commit": "19b4a8d520a6e0176dd52aaa429261ad4fcaa545",
      "tree": "6dcf5a780718fc50b9cd79cc803daa7c7e080a02",
      "parents": [
        "3cfef9524677a4ecb392d6fbffe6ebce6302f1d4",
        "048b718029033af117870d3da47da12995be14a3"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Oct 26 16:26:53 2011 +0200"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Oct 26 16:26:53 2011 +0200"
      },
      "message": "Merge branch \u0027core-rcu-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\n* \u0027core-rcu-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (45 commits)\n  rcu: Move propagation of -\u003ecompleted from rcu_start_gp() to rcu_report_qs_rsp()\n  rcu: Remove rcu_needs_cpu_flush() to avoid false quiescent states\n  rcu: Wire up RCU_BOOST_PRIO for rcutree\n  rcu: Make rcu_torture_boost() exit loops at end of test\n  rcu: Make rcu_torture_fqs() exit loops at end of test\n  rcu: Permit rt_mutex_unlock() with irqs disabled\n  rcu: Avoid having just-onlined CPU resched itself when RCU is idle\n  rcu: Suppress NMI backtraces when stall ends before dump\n  rcu: Prohibit grace periods during early boot\n  rcu: Simplify unboosting checks\n  rcu: Prevent early boot set_need_resched() from __rcu_pending()\n  rcu: Dump local stack if cannot dump all CPUs\u0027 stacks\n  rcu: Move __rcu_read_unlock()\u0027s barrier() within if-statement\n  rcu: Improve rcu_assign_pointer() and RCU_INIT_POINTER() documentation\n  rcu: Make rcu_assign_pointer() unconditionally insert a memory barrier\n  rcu: Make rcu_implicit_dynticks_qs() locals be correct size\n  rcu: Eliminate in_irq() checks in rcu_enter_nohz()\n  nohz: Remove nohz_cpu_mask\n  rcu: Document interpretation of RCU-lockdep splats\n  rcu: Allow rcutorture\u0027s stat_interval parameter to be changed at runtime\n  ...\n"
    },
    {
      "commit": "3cfef9524677a4ecb392d6fbffe6ebce6302f1d4",
      "tree": "88647d9dc50d634dee9cfeb7f354d620977a2f33",
      "parents": [
        "982653009b883ef1529089e3e6f1ae2fee41cbe2",
        "68cc3990a545dc0da221b4844dd8b9c06623a6c5"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Oct 26 16:17:32 2011 +0200"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Oct 26 16:17:32 2011 +0200"
      },
      "message": "Merge branch \u0027core-locking-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\n* \u0027core-locking-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (27 commits)\n  rtmutex: Add missing rcu_read_unlock() in debug_rt_mutex_print_deadlock()\n  lockdep: Comment all warnings\n  lib: atomic64: Change the type of local lock to raw_spinlock_t\n  locking, lib/atomic64: Annotate atomic64_lock::lock as raw\n  locking, x86, iommu: Annotate qi-\u003eq_lock as raw\n  locking, x86, iommu: Annotate irq_2_ir_lock as raw\n  locking, x86, iommu: Annotate iommu-\u003eregister_lock as raw\n  locking, dma, ipu: Annotate bank_lock as raw\n  locking, ARM: Annotate low level hw locks as raw\n  locking, drivers/dca: Annotate dca_lock as raw\n  locking, powerpc: Annotate uic-\u003elock as raw\n  locking, x86: mce: Annotate cmci_discover_lock as raw\n  locking, ACPI: Annotate c3_lock as raw\n  locking, oprofile: Annotate oprofilefs lock as raw\n  locking, video: Annotate vga console lock as raw\n  locking, latencytop: Annotate latency_lock as raw\n  locking, timer_stats: Annotate table_lock as raw\n  locking, rwsem: Annotate inner lock as raw\n  locking, semaphores: Annotate inner lock as raw\n  locking, sched: Annotate thread_group_cputimer as raw\n  ...\n\nFix up conflicts in kernel/posix-cpu-timers.c manually: making\ncputimer-\u003ecputime a raw lock conflicted with the ABBA fix in commit\nbcd5cff7216f (\"cputimer: Cure lock inversion\").\n"
    },
    {
      "commit": "1be025d3cb40cd295123af2c394f7229ef9b30ca",
      "tree": "5dc14e1ea412cc7fdc3e563ad23187059fe8bfb5",
      "parents": [
        "2d03423b2319cc854adeb28a03f65de5b5e0ab63",
        "a2c76b83fdd763c826f38a55127ccf25708099ce"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Oct 25 12:23:15 2011 +0200"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Oct 25 12:23:15 2011 +0200"
      },
      "message": "Merge branch \u0027usb-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb\n\n* \u0027usb-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (260 commits)\n  usb: renesas_usbhs: fixup inconsistent return from usbhs_pkt_push()\n  usb/isp1760: Allow to optionally trigger low-level chip reset via GPIOLIB.\n  USB: gadget: midi: memory leak in f_midi_bind_config()\n  USB: gadget: midi: fix range check in f_midi_out_open()\n  QE/FHCI: fixed the CONTROL bug\n  usb: renesas_usbhs: tidyup for smatch warnings\n  USB: Fix USB Kconfig dependency problem on 85xx/QoirQ platforms\n  EHCI: workaround for MosChip controller bug\n  usb: gadget: file_storage: fix race on unloading\n  USB: ftdi_sio.c: Use ftdi async_icount structure for TIOCMIWAIT, as in other drivers\n  USB: ftdi_sio.c:Fill MSR fields of the ftdi async_icount structure\n  USB: ftdi_sio.c: Fill LSR fields of the ftdi async_icount structure\n  USB: ftdi_sio.c:Fill TX field of the ftdi async_icount structure\n  USB: ftdi_sio.c: Fill the RX field of the ftdi async_icount structure\n  USB: ftdi_sio.c: Basic icount infrastructure for ftdi_sio\n  usb/isp1760: Let OF bindings depend on general CONFIG_OF instead of PPC_OF .\n  USB: ftdi_sio: Support TI/Luminary Micro Stellaris BD-ICDI Board\n  USB: Fix runtime wakeup on OHCI\n  xHCI/USB: Make xHCI driver have a BOS descriptor.\n  usb: gadget: add new usb gadget for ACM and mass storage\n  ...\n"
    },
    {
      "commit": "fa14ff4accfb24e59d2473f3d864d6648d80563b",
      "tree": "a2f3f5a16e1e740c6f96857e60c37826689d7b0b",
      "parents": [
        "924f8f5af31423529cc3940cb2ae9fee736b7517"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Mon Sep 12 13:06:17 2011 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Oct 04 12:43:58 2011 +0200"
      },
      "message": "sched: Convert to struct llist\n\nUse the generic llist primitives.\n\nWe had a private lockless list implementation in the scheduler in the wake-list\ncode, now that we have a generic llist implementation that provides all required\noperations, switch to it.\n\nThis patch is not expected to change any behavior.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Huang Ying \u003cying.huang@intel.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLink: http://lkml.kernel.org/r/1315836353.26517.42.camel@twins\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "22f92bacbeea24b20e447444c28e7cad9f1ac3f8",
      "tree": "5c3f2346804a186aa2d954f078fd2f4d44bcc26e",
      "parents": [
        "557ab425429a5123d37f412ce3e6d6137cb621f8",
        "0f86267b79bc6e357b8606077c7f70239045ea9c"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Oct 04 11:08:16 2011 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Oct 04 11:09:08 2011 +0200"
      },
      "message": "Merge branch \u0027linus\u0027 into sched/core\n\nMerge reason: pick up the latest fixes.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "9d823e8f6b1b7b39f952d7d1795f29162143a433",
      "tree": "2ef4c0d29353452dd2f894e7dbd240a31bdd0a02",
      "parents": [
        "7381131cbcf7e15d201a0ffd782a4698efe4e740"
      ],
      "author": {
        "name": "Wu Fengguang",
        "email": "fengguang.wu@intel.com",
        "time": "Sat Jun 11 18:10:12 2011 -0600"
      },
      "committer": {
        "name": "Wu Fengguang",
        "email": "fengguang.wu@intel.com",
        "time": "Mon Oct 03 21:08:57 2011 +0800"
      },
      "message": "writeback: per task dirty rate limit\n\nAdd two fields to task_struct.\n\n1) account dirtied pages in the individual tasks, for accuracy\n2) per-task balance_dirty_pages() call intervals, for flexibility\n\nThe balance_dirty_pages() call interval (ie. nr_dirtied_pause) will\nscale near-sqrt to the safety gap between dirty pages and threshold.\n\nThe main problem of per-task nr_dirtied is, if 1k+ tasks start dirtying\npages at exactly the same time, each task will be assigned a large\ninitial nr_dirtied_pause, so that the dirty threshold will be exceeded\nlong before each task reached its nr_dirtied_pause and hence call\nbalance_dirty_pages().\n\nThe solution is to watch for the number of pages dirtied on each CPU in\nbetween the calls into balance_dirty_pages(). If it exceeds ratelimit_pages\n(3% dirty threshold), force call balance_dirty_pages() for a chance to\nset bdi-\u003edirty_exceeded. In normal situations, this safeguarding\ncondition is not expected to trigger at all.\n\nOn the sqrt in dirty_poll_interval():\n\nIt will serve as an initial guess when dirty pages are still in the\nfreerun area.\n\nWhen dirty pages are floating inside the dirty control scope [freerun,\nlimit], a followup patch will use some refined dirty poll interval to\nget the desired pause time.\n\n   thresh-dirty (MB)    sqrt\n\t\t   1      16\n\t\t   2      22\n\t\t   4      32\n\t\t   8      45\n\t\t  16      64\n\t\t  32      90\n\t\t  64     128\n\t\t 128     181\n\t\t 256     256\n\t\t 512     362\n\t\t1024     512\n\nThe above table means, given 1MB (or 1GB) gap and the dd tasks polling\nbalance_dirty_pages() on every 16 (or 512) pages, the dirty limit won\u0027t\nbe exceeded as long as there are less than 16 (or 512) concurrent dd\u0027s.\n\nSo sqrt naturally leads to less overheads and more safe concurrent tasks\nfor large memory servers, which have large (thresh-freerun) gaps.\n\npeter: keep the per-CPU ratelimit for safeguarding the 1k+ tasks case\n\nCC: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nReviewed-by: Andrea Righi \u003candrea@betterlinux.com\u003e\nSigned-off-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\n"
    },
    {
      "commit": "d670ec13178d0fd8680e6742a2bc6e04f28f87d8",
      "tree": "81a2ac824dd92a0536e42f9a0ba3d83240856722",
      "parents": [
        "6ebbe7a07b3bc40b168d2afc569a6543c020d2e3"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Thu Sep 01 12:42:04 2011 +0200"
      },
      "committer": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Fri Sep 30 14:07:06 2011 +0200"
      },
      "message": "posix-cpu-timers: Cure SMP wobbles\n\nDavid reported:\n\n  Attached below is a watered-down version of rt/tst-cpuclock2.c from\n  GLIBC.  Just build it with \"gcc -o test test.c -lpthread -lrt\" or\n  similar.\n\n  Run it several times, and you will see cases where the main thread\n  will measure a process clock difference before and after the nanosleep\n  which is smaller than the cpu-burner thread\u0027s individual thread clock\n  difference.  This doesn\u0027t make any sense since the cpu-burner thread\n  is part of the top-level process\u0027s thread group.\n\n  I\u0027ve reproduced this on both x86-64 and sparc64 (using both 32-bit and\n  64-bit binaries).\n\n  For example:\n\n  [davem@boricha build-x86_64-linux]$ ./test\n  process: before(0.001221967) after(0.498624371) diff(497402404)\n  thread:  before(0.000081692) after(0.498316431) diff(498234739)\n  self:    before(0.001223521) after(0.001240219) diff(16698)\n  [davem@boricha build-x86_64-linux]$ \n\n  The diff of \u0027process\u0027 should always be \u003e\u003d the diff of \u0027thread\u0027.\n\n  I make sure to wrap the \u0027thread\u0027 clock measurements the most tightly\n  around the nanosleep() call, and that the \u0027process\u0027 clock measurements\n  are the outer-most ones.\n\n  ---\n  #include \u003cunistd.h\u003e\n  #include \u003cstdio.h\u003e\n  #include \u003cstdlib.h\u003e\n  #include \u003ctime.h\u003e\n  #include \u003cfcntl.h\u003e\n  #include \u003cstring.h\u003e\n  #include \u003cerrno.h\u003e\n  #include \u003cpthread.h\u003e\n\n  static pthread_barrier_t barrier;\n\n  static void *chew_cpu(void *arg)\n  {\n\t  pthread_barrier_wait(\u0026barrier);\n\t  while (1)\n\t\t  __asm__ __volatile__(\"\" : : : \"memory\");\n\t  return NULL;\n  }\n\n  int main(void)\n  {\n\t  clockid_t process_clock, my_thread_clock, th_clock;\n\t  struct timespec process_before, process_after;\n\t  struct timespec me_before, me_after;\n\t  struct timespec th_before, th_after;\n\t  struct timespec sleeptime;\n\t  unsigned long diff;\n\t  pthread_t th;\n\t  int err;\n\n\t  err \u003d clock_getcpuclockid(0, \u0026process_clock);\n\t  if (err)\n\t\t  return 1;\n\n\t  err \u003d pthread_getcpuclockid(pthread_self(), \u0026my_thread_clock);\n\t  if (err)\n\t\t  return 1;\n\n\t  pthread_barrier_init(\u0026barrier, NULL, 2);\n\t  err \u003d pthread_create(\u0026th, NULL, chew_cpu, NULL);\n\t  if (err)\n\t\t  return 1;\n\n\t  err \u003d pthread_getcpuclockid(th, \u0026th_clock);\n\t  if (err)\n\t\t  return 1;\n\n\t  pthread_barrier_wait(\u0026barrier);\n\n\t  err \u003d clock_gettime(process_clock, \u0026process_before);\n\t  if (err)\n\t\t  return 1;\n\n\t  err \u003d clock_gettime(my_thread_clock, \u0026me_before);\n\t  if (err)\n\t\t  return 1;\n\n\t  err \u003d clock_gettime(th_clock, \u0026th_before);\n\t  if (err)\n\t\t  return 1;\n\n\t  sleeptime.tv_sec \u003d 0;\n\t  sleeptime.tv_nsec \u003d 500000000;\n\t  nanosleep(\u0026sleeptime, NULL);\n\n\t  err \u003d clock_gettime(th_clock, \u0026th_after);\n\t  if (err)\n\t\t  return 1;\n\n\t  err \u003d clock_gettime(my_thread_clock, \u0026me_after);\n\t  if (err)\n\t\t  return 1;\n\n\t  err \u003d clock_gettime(process_clock, \u0026process_after);\n\t  if (err)\n\t\t  return 1;\n\n\t  diff \u003d process_after.tv_nsec - process_before.tv_nsec;\n\t  printf(\"process: before(%lu.%.9lu) after(%lu.%.9lu) diff(%lu)\\n\",\n\t\t process_before.tv_sec, process_before.tv_nsec,\n\t\t process_after.tv_sec, process_after.tv_nsec, diff);\n\t  diff \u003d th_after.tv_nsec - th_before.tv_nsec;\n\t  printf(\"thread:  before(%lu.%.9lu) after(%lu.%.9lu) diff(%lu)\\n\",\n\t\t th_before.tv_sec, th_before.tv_nsec,\n\t\t th_after.tv_sec, th_after.tv_nsec, diff);\n\t  diff \u003d me_after.tv_nsec - me_before.tv_nsec;\n\t  printf(\"self:    before(%lu.%.9lu) after(%lu.%.9lu) diff(%lu)\\n\",\n\t\t me_before.tv_sec, me_before.tv_nsec,\n\t\t me_after.tv_sec, me_after.tv_nsec, diff);\n\n\t  return 0;\n  }\n\nThis is due to us using p-\u003ese.sum_exec_runtime in\nthread_group_cputime() where we iterate the thread group and sum all\ndata. This does not take time since the last schedule operation (tick\nor otherwise) into account. We can cure this by using\ntask_sched_runtime() at the cost of having to take locks.\n\nThis also means we can (and must) do away with\nthread_group_sched_runtime() since the modified thread_group_cputime()\nis now more accurate and would deadlock when called from\nthread_group_sched_runtime().\n\nAside of that it makes the function safe on 32 bit systems. The old\ncode added t-\u003ese.sum_exec_runtime unprotected. sum_exec_runtime is a\n64bit value and could be changed on another cpu at the same time.\n\nReported-by: David Miller \u003cdavem@davemloft.net\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: stable@kernel.org\nLink: http://lkml.kernel.org/r/1314874459.7945.22.camel@twins\nTested-by: David Miller \u003cdavem@davemloft.net\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n"
    },
    {
      "commit": "d178bc3a708f39cbfefc3fab37032d3f2511b4ec",
      "tree": "af492e92e140f1f6abad5a377a269ef7335824de",
      "parents": [
        "edb2b255a0bebac5aeb17c7613aeb76ba4e6c63c"
      ],
      "author": {
        "name": "Serge Hallyn",
        "email": "serge.hallyn@canonical.com",
        "time": "Mon Sep 26 10:45:18 2011 -0500"
      },
      "committer": {
        "name": "Greg Kroah-Hartman",
        "email": "gregkh@suse.de",
        "time": "Thu Sep 29 13:13:08 2011 -0700"
      },
      "message": "user namespace: usb: make usb urbs user namespace aware (v2)\n\nAdd to the dev_state and alloc_async structures the user namespace\ncorresponding to the uid and euid.  Pass these to kill_pid_info_as_uid(),\nwhich can then implement a proper, user-namespace-aware uid check.\n\nChangelog:\nSep 20: Per Oleg\u0027s suggestion: Instead of caching and passing user namespace,\n\tuid, and euid each separately, pass a struct cred.\nSep 26: Address Alan Stern\u0027s comments: don\u0027t define a struct cred at\n\tusbdev_open(), and take and put a cred at async_completed() to\n\tensure it lasts for the duration of kill_pid_info_as_cred().\n\nSigned-off-by: Serge Hallyn \u003cserge.hallyn@canonical.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\n"
    },
    {
      "commit": "82e78d80fc392ac7e98326bc8beeb8a679913ffd",
      "tree": "4999d3c03ed711056474c3a31512e7d3cf253b87",
      "parents": [
        "5c51dd7349d4bb26f845f17f85daa168f5fa03f2"
      ],
      "author": {
        "name": "Paul E. McKenney",
        "email": "paul.mckenney@linaro.org",
        "time": "Thu Aug 04 07:55:34 2011 -0700"
      },
      "committer": {
        "name": "Paul E. McKenney",
        "email": "paulmck@linux.vnet.ibm.com",
        "time": "Wed Sep 28 21:38:39 2011 -0700"
      },
      "message": "rcu: Simplify unboosting checks\n\nCommit 7765be (Fix RCU_BOOST race handling current-\u003ercu_read_unlock_special)\nintroduced a new -\u003ercu_boosted field in the task structure.  This is\nredundant because the existing -\u003ercu_boost_mutex will be non-NULL at\nany time that -\u003ercu_boosted is nonzero.  Therefore, this commit removes\n-\u003ercu_boosted and tests -\u003ercu_boost_mutex instead.\n\nSigned-off-by: Paul E. McKenney \u003cpaul.mckenney@linaro.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n"
    },
    {
      "commit": "fc0763f53e3ff6a6bfa66934662a3446b9ca6f16",
      "tree": "2671d3f6275c9707a620032658ecb05025e4e9fa",
      "parents": [
        "d7bd2d68aa2ee2738a10c8ad9346b805e4ab2e1c"
      ],
      "author": {
        "name": "Shi, Alex",
        "email": "alex.shi@intel.com",
        "time": "Thu Jul 28 14:56:12 2011 +0800"
      },
      "committer": {
        "name": "Paul E. McKenney",
        "email": "paulmck@linux.vnet.ibm.com",
        "time": "Wed Sep 28 21:38:29 2011 -0700"
      },
      "message": "nohz: Remove nohz_cpu_mask\n\nRCU no longer uses this global variable, nor does anyone else.  This\ncommit therefore removes this variable.  This reduces memory footprint\nand also removes some atomic instructions and memory barriers from\nthe dyntick-idle path.\n\nSigned-off-by: Alex Shi \u003calex.shi@intel.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n"
    },
    {
      "commit": "ee30a7b2fc072f139dac44826860d2c1f422137c",
      "tree": "4f11173879b25cc31822cb0a8d9dbd48395e74bc",
      "parents": [
        "07354eb1a74d1e1ece29f8bafe0b46e8c77a95ef"
      ],
      "author": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Sat Jul 25 18:56:56 2009 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Sep 13 11:11:55 2011 +0200"
      },
      "message": "locking, sched: Annotate thread_group_cputimer as raw\n\nThe thread_group_cputimer lock can be taken in atomic context and therefore\ncannot be preempted on -rt - annotate it.\n\nIn mainline this change documents the low level nature of\nthe lock - otherwise there\u0027s no functional difference. Lockdep\nand Sparse checking will work as usual.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "ec12cb7f31e28854efae7dd6f9544e0a66379040",
      "tree": "30a7293a4f9d566043f524bb4c43d4ae8b0560db",
      "parents": [
        "a790de99599a29ad3f18667530cf4b9f4b7e3234"
      ],
      "author": {
        "name": "Paul Turner",
        "email": "pjt@google.com",
        "time": "Thu Jul 21 09:43:30 2011 -0700"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sun Aug 14 12:03:26 2011 +0200"
      },
      "message": "sched: Accumulate per-cfs_rq cpu usage and charge against bandwidth\n\nAccount bandwidth usage on the cfs_rq level versus the task_groups to which\nthey belong.  Whether we are tracking bandwidth on a given cfs_rq is maintained\nunder cfs_rq-\u003eruntime_enabled.\n\ncfs_rq\u0027s which belong to a bandwidth constrained task_group have their runtime\naccounted via the update_curr() path, which withdraws bandwidth from the global\npool as desired.  Updates involving the global pool are currently protected\nunder cfs_bandwidth-\u003elock, local runtime is protected by rq-\u003elock.\n\nThis patch only assigns and tracks quota, no action is taken in the case that\ncfs_rq-\u003eruntime_used exceeds cfs_rq-\u003eruntime_assigned.\n\nSigned-off-by: Paul Turner \u003cpjt@google.com\u003e\nSigned-off-by: Nikhil Rao \u003cncrao@google.com\u003e\nSigned-off-by: Bharata B Rao \u003cbharata@linux.vnet.ibm.com\u003e\nReviewed-by: Hidetoshi Seto \u003cseto.hidetoshi@jp.fujitsu.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/r/20110721184757.179386821@google.com\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "72fa59970f8698023045ab0713d66f3f4f96945c",
      "tree": "ed9a5eaf8212270d464c6d4396ae5a568352a997",
      "parents": [
        "1d229d54dbc26971142f61c3d271a68db236d178"
      ],
      "author": {
        "name": "Vasiliy Kulikov",
        "email": "segoon@openwall.com",
        "time": "Mon Aug 08 19:02:04 2011 +0400"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Aug 11 11:24:42 2011 -0700"
      },
      "message": "move RLIMIT_NPROC check from set_user() to do_execve_common()\n\nThe patch http://lkml.org/lkml/2003/7/13/226 introduced an RLIMIT_NPROC\ncheck in set_user() to check for NPROC exceeding via setuid() and\nsimilar functions.\n\nBefore the check there was a possibility to greatly exceed the allowed\nnumber of processes by an unprivileged user if the program relied on\nrlimit only.  But the check created new security threat: many poorly\nwritten programs simply don\u0027t check setuid() return code and believe it\ncannot fail if executed with root privileges.  So, the check is removed\nin this patch because of too often privilege escalations related to\nbuggy programs.\n\nThe NPROC can still be enforced in the common code flow of daemons\nspawning user processes.  Most of daemons do fork()+setuid()+execve().\nThe check introduced in execve() (1) enforces the same limit as in\nsetuid() and (2) doesn\u0027t create similar security issues.\n\nNeil Brown suggested to track what specific process has exceeded the\nlimit by setting PF_NPROC_EXCEEDED process flag.  With the change only\nthis process would fail on execve(), and other processes\u0027 execve()\nbehaviour is not changed.\n\nSolar Designer suggested to re-check whether NPROC limit is still\nexceeded at the moment of execve().  If the process was sleeping for\ndays between set*uid() and execve(), and the NPROC counter step down\nunder the limit, the defered execve() failure because NPROC limit was\nexceeded days ago would be unexpected.  If the limit is not exceeded\nanymore, we clear the flag on successful calls to execve() and fork().\n\nThe flag is also cleared on successful calls to set_user() as the limit\nwas exceeded for the previous user, not the current one.\n\nSimilar check was introduced in -ow patches (without the process flag).\n\nv3 - clear PF_NPROC_EXCEEDED on successful calls to set_user().\n\nReviewed-by: James Morris \u003cjmorris@namei.org\u003e\nSigned-off-by: Vasiliy Kulikov \u003csegoon@openwall.com\u003e\nAcked-by: NeilBrown \u003cneilb@suse.de\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "096a705bbc080a4041636d07514560da8d78acbe",
      "tree": "38c3c01225709ffa53419083ea6332f8a72610de",
      "parents": [
        "fea80311a939a746533a6d7e7c3183729d6a3faf",
        "5757a6d76cdf6dda2a492c09b985c015e86779b1"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jul 25 10:33:36 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jul 25 10:33:36 2011 -0700"
      },
      "message": "Merge branch \u0027for-3.1/core\u0027 of git://git.kernel.dk/linux-block\n\n* \u0027for-3.1/core\u0027 of git://git.kernel.dk/linux-block: (24 commits)\n  block: strict rq_affinity\n  backing-dev: use synchronize_rcu_expedited instead of synchronize_rcu\n  block: fix patch import error in max_discard_sectors check\n  block: reorder request_queue to remove 64 bit alignment padding\n  CFQ: add think time check for group\n  CFQ: add think time check for service tree\n  CFQ: move think time check variables to a separate struct\n  fixlet: Remove fs_excl from struct task.\n  cfq: Remove special treatment for metadata rqs.\n  block: document blk_plug list access\n  block: avoid building too big plug list\n  compat_ioctl: fix make headers_check regression\n  block: eliminate potential for infinite loop in blkdev_issue_discard\n  compat_ioctl: fix warning caused by qemu\n  block: flush MEDIA_CHANGE from drivers on close(2)\n  blk-throttle: Make total_nr_queued unsigned\n  block: Add __attribute__((format(printf...) and fix fallout\n  fs/partitions/check.c: make local symbols static\n  block:remove some spare spaces in genhd.c\n  block:fix the comment error in blkdev.h\n  ...\n"
    },
    {
      "commit": "bdc7ccfc0631797636837b10df7f87bc1e2e4ae3",
      "tree": "70f09f8ffee07486d41ca254b8abb05692713d1e",
      "parents": [
        "4d4abdcb1dee03a4f9d6d2021622ed07e14dfd17",
        "0f3171438fc917b9f6b8b60dbb7a3fff9a0f68fd"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Jul 22 16:45:02 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Jul 22 16:45:02 2011 -0700"
      },
      "message": "Merge branch \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (24 commits)\n  sched: Cleanup duplicate local variable in [enqueue|dequeue]_task_fair\n  sched: Replace use of entity_key()\n  sched: Separate group-scheduling code more clearly\n  sched: Reorder root_domain to remove 64 bit alignment padding\n  sched: Do not attempt to destroy uninitialized rt_bandwidth\n  sched: Remove unused function cpu_cfs_rq()\n  sched: Fix (harmless) typo \u0027CONFG_FAIR_GROUP_SCHED\u0027\n  sched, cgroup: Optimize load_balance_fair()\n  sched: Don\u0027t update shares twice on on_rq parent\n  sched: update correct entity\u0027s runtime in check_preempt_wakeup()\n  xtensa: Use generic config PREEMPT definition\n  h8300: Use generic config PREEMPT definition\n  m32r: Use generic PREEMPT config\n  sched: Skip autogroup when looking for all rt sched groups\n  sched: Simplify mutex_spin_on_owner()\n  sched: Remove rcu_read_lock() from wake_affine()\n  sched: Generalize sleep inside spinlock detection\n  sched: Make sleeping inside spinlock detection working in !CONFIG_PREEMPT\n  sched: Isolate preempt counting in its own config option\n  sched: Remove pointless in_atomic() definition check\n  ...\n"
    },
    {
      "commit": "8209f53d79444747782a28520187abaf689761f2",
      "tree": "726270ea29e037f026d77a99787b9d844531ac42",
      "parents": [
        "22a3b9771117d566def0150ea787fcc95f16e724",
        "eac1b5e57d7abc836e78fd3fbcf77dbeed01edc9"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Jul 22 15:06:50 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Jul 22 15:06:50 2011 -0700"
      },
      "message": "Merge branch \u0027ptrace\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc\n\n* \u0027ptrace\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc: (39 commits)\n  ptrace: do_wait(traced_leader_killed_by_mt_exec) can block forever\n  ptrace: fix ptrace_signal() \u0026\u0026 STOP_DEQUEUED interaction\n  connector: add an event for monitoring process tracers\n  ptrace: dont send SIGSTOP on auto-attach if PT_SEIZED\n  ptrace: mv send-SIGSTOP from do_fork() to ptrace_init_task()\n  ptrace_init_task: initialize child-\u003ejobctl explicitly\n  has_stopped_jobs: s/task_is_stopped/SIGNAL_STOP_STOPPED/\n  ptrace: make former thread ID available via PTRACE_GETEVENTMSG after PTRACE_EVENT_EXEC stop\n  ptrace: wait_consider_task: s/same_thread_group/ptrace_reparented/\n  ptrace: kill real_parent_is_ptracer() in in favor of ptrace_reparented()\n  ptrace: ptrace_reparented() should check same_thread_group()\n  redefine thread_group_leader() as exit_signal \u003e\u003d 0\n  do not change dead_task-\u003eexit_signal\n  kill task_detached()\n  reparent_leader: check EXIT_DEAD instead of task_detached()\n  make do_notify_parent() __must_check, update the callers\n  __ptrace_detach: avoid task_detached(), check do_notify_parent()\n  kill tracehook_notify_death()\n  make do_notify_parent() return bool\n  ptrace: s/tracehook_tracer_task()/ptrace_parent()/\n  ...\n"
    },
    {
      "commit": "994bf1c92270e3d7731ea08f1d1bd7a668314e60",
      "tree": "4409a21eab486e53fbe350a66e8a4f28b7a720c0",
      "parents": [
        "bd96efe17d945f0bad56d592f8686dc6309905e7",
        "cf6ace16a3cd8b728fb0afa68368fd40bbeae19f"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Jul 21 17:59:54 2011 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Jul 21 18:00:01 2011 +0200"
      },
      "message": "Merge branch \u0027linus\u0027 into sched/core\n\nMerge reason: pick up the latest scheduler fixes.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "cf6ace16a3cd8b728fb0afa68368fd40bbeae19f",
      "tree": "489c64380668e8c5a29d3f36f37554e4b081a647",
      "parents": [
        "acc11eab70591744369722280c9ce162a6193494",
        "d1e9ae47a0285d3f1699e8219ce50f656243b93f"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Jul 20 15:56:25 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Jul 20 15:56:25 2011 -0700"
      },
      "message": "Merge branch \u0027core-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027core-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n  signal: align __lock_task_sighand() irq disabling and RCU\n  softirq,rcu: Inform RCU of irq_exit() activity\n  sched: Add irq_{enter,exit}() to scheduler_ipi()\n  rcu: protect __rcu_read_unlock() against scheduler-using irq handlers\n  rcu: Streamline code produced by __rcu_read_unlock()\n  rcu: Fix RCU_BOOST race handling current-\u003ercu_read_unlock_special\n  rcu: decrease rcu_report_exp_rnp coupling with scheduler\n"
    },
    {
      "commit": "e3589f6c81e4764d32a25d2a2a0afe54fa344f5c",
      "tree": "414bf6bdbad3f04f629fa2a72254ea85acf723f4",
      "parents": [
        "9c3f75cbd144014bea6af866a154cc2e73ab2287"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Fri Jul 15 10:35:52 2011 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Jul 20 18:32:41 2011 +0200"
      },
      "message": "sched: Allow for overlapping sched_domain spans\n\nAllow for sched_domain spans that overlap by giving such domains their\nown sched_group list instead of sharing the sched_groups amongst\neach-other.\n\nThis is needed for machines with more than 16 nodes, because\nsched_domain_node_span() will generate a node mask from the\n16 nearest nodes without regard if these masks have any overlap.\n\nCurrently sched_domains have a sched_group that maps to their child\nsched_domain span, and since there is no overlap we share the\nsched_group between the sched_domains of the various CPUs. If however\nthere is overlap, we would need to link the sched_group list in\ndifferent ways for each cpu, and hence sharing isn\u0027t possible.\n\nIn order to solve this, allocate private sched_groups for each CPU\u0027s\nsched_domain but have the sched_groups share a sched_group_power\nstructure such that we can uniquely track the power.\n\nReported-and-tested-by: Anton Blanchard \u003canton@samba.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLink: http://lkml.kernel.org/n/tip-08bxqw9wis3qti9u5inifh3y@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "9c3f75cbd144014bea6af866a154cc2e73ab2287",
      "tree": "2a565f7ff0820269973415c5605e313cfff903b4",
      "parents": [
        "e6625fa48e6580a74b7e700efd7e6463e282810b"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Thu Jul 14 13:00:06 2011 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Jul 20 18:32:40 2011 +0200"
      },
      "message": "sched: Break out cpu_power from the sched_group structure\n\nIn order to prepare for non-unique sched_groups per domain, we need to\ncarry the cpu_power elsewhere, so put a level of indirection in.\n\nReported-and-tested-by: Anton Blanchard \u003canton@samba.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLink: http://lkml.kernel.org/n/tip-qkho2byuhe4482fuknss40ad@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "7765be2fec0f476fcd61812d5f9406b04c765020",
      "tree": "e89ccb3fbd5655090b05f608f8e1d39924f23a9a",
      "parents": [
        "131906b0062ddde7f85bbe67754983c754648bd8"
      ],
      "author": {
        "name": "Paul E. McKenney",
        "email": "paul.mckenney@linaro.org",
        "time": "Thu Jul 14 12:24:11 2011 -0700"
      },
      "committer": {
        "name": "Paul E. McKenney",
        "email": "paulmck@linux.vnet.ibm.com",
        "time": "Tue Jul 19 21:38:52 2011 -0700"
      },
      "message": "rcu: Fix RCU_BOOST race handling current-\u003ercu_read_unlock_special\n\nThe RCU_BOOST commits for TREE_PREEMPT_RCU introduced an other-task\nwrite to a new RCU_READ_UNLOCK_BOOSTED bit in the task_struct structure\u0027s\n-\u003ercu_read_unlock_special field, but, as noted by Steven Rostedt, without\ncorrectly synchronizing all accesses to -\u003ercu_read_unlock_special.\nThis could result in bits in -\u003ercu_read_unlock_special being spuriously\nset and cleared due to conflicting accesses, which in turn could result\nin deadlocks between the rcu_node structure\u0027s -\u003elock and the scheduler\u0027s\nrq and pi locks.  These deadlocks would result from RCU incorrectly\nbelieving that the just-ended RCU read-side critical section had been\npreempted and/or boosted.  If that RCU read-side critical section was\nexecuted with either rq or pi locks held, RCU\u0027s ensuing (incorrect)\ncalls to the scheduler would cause the scheduler to attempt to once\nagain acquire the rq and pi locks, resulting in deadlock.  More complex\ndeadlock cycles are also possible, involving multiple rq and pi locks\nas well as locks from multiple rcu_node structures.\n\nThis commit fixes synchronization by creating -\u003ercu_boosted field in\ntask_struct that is accessed and modified only when holding the -\u003elock\nin the rcu_node structure on which the task is queued (on that rcu_node\nstructure\u0027s -\u003eblkd_tasks list).  This results in tasks accessing only\ntheir own current-\u003ercu_read_unlock_special fields, making unsynchronized\naccess once again legal, and keeping the rcu_read_unlock() fastpath free\nof atomic instructions and memory barriers.\n\nThe reason that the rcu_read_unlock() fastpath does not need to access\nthe new current-\u003ercu_boosted field is that this new field cannot\nbe non-zero unless the RCU_READ_UNLOCK_BLOCKED bit is set in the\ncurrent-\u003ercu_read_unlock_special field.  Therefore, rcu_read_unlock()\nneed only test current-\u003ercu_read_unlock_special: if that is zero, then\ncurrent-\u003ercu_boosted must also be zero.\n\nThis bug does not affect TINY_PREEMPT_RCU because this implementation\nof RCU accesses current-\u003ercu_read_unlock_special with irqs disabled,\nthus preventing races on the !SMP systems that TINY_PREEMPT_RCU runs on.\n\nMaybe-reported-by: Dave Jones \u003cdavej@redhat.com\u003e\nMaybe-reported-by: Sergey Senozhatsky \u003csergey.senozhatsky@gmail.com\u003e\nReported-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaul.mckenney@linaro.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nReviewed-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n"
    },
    {
      "commit": "4aede84b33d6beb401136a3deca0651ae07c5e99",
      "tree": "831266dbb15227584da5011ae4bb1e5038a69677",
      "parents": [
        "a07405b7802691d29ab3b23bdc76ee6d006aad0b"
      ],
      "author": {
        "name": "Justin TerAvest",
        "email": "teravest@google.com",
        "time": "Tue Jul 12 08:31:45 2011 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jaxboe@fusionio.com",
        "time": "Tue Jul 12 08:35:10 2011 +0200"
      },
      "message": "fixlet: Remove fs_excl from struct task.\n\nfs_excl is a poor man\u0027s priority inheritance for filesystems to hint to\nthe block layer that an operation is important. It was never clearly\nspecified, not widely adopted, and will not prevent starvation in many\ncases (like across cgroups).\n\nfs_excl was introduced with the time sliced CFQ IO scheduler, to\nindicate when a process held FS exclusive resources and thus needed\na boost.\n\nIt doesn\u0027t cover all file systems, and it was never fully complete.\nLets kill it.\n\nSigned-off-by: Justin TerAvest \u003cteravest@google.com\u003e\nSigned-off-by: Jens Axboe \u003cjaxboe@fusionio.com\u003e\n"
    },
    {
      "commit": "e4c2fb0d5776b58049d2556b456144a4db3fe5a9",
      "tree": "04cebbb24f524408728492cfeb396d66aa6127e4",
      "parents": [
        "cd62287e364c0d15d517c6ced4e4808b54711475"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Tue Jul 05 10:56:32 2011 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Jul 05 11:28:18 2011 +0200"
      },
      "message": "sched: Disable (revert) SCHED_LOAD_SCALE increase\n\nAlex reported that commit c8b281161df (\"sched: Increase\nSCHED_LOAD_SCALE resolution\") caused a power usage regression\nunder light load as it increases the number of load-balance\noperations and keeps idle cpus from staying idle.\n\nTime has run out to find the root cause for this release so\ndisable the feature for v3.0 until we can figure out what\ncauses the problem.\n\nReported-by: \"Alex, Shi\" \u003calex.shi@intel.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nikhil Rao \u003cncrao@google.com\u003e\nCc: Ming Lei \u003ctom.leiming@gmail.com\u003e\nCc: Mike Galbraith \u003cefault@gmx.de\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLink: http://lkml.kernel.org/n/tip-m4onxn0sxnyn5iz9o88eskc3@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "1ecc818c51b1f6886825dae3885792d5e49ec798",
      "tree": "2179ae53fa86ea6a42d01ff4efc1a3f6a32e76f2",
      "parents": [
        "1c09ab0d257317f97e8629a3d0c8713d6dd9de4c",
        "d902db1eb60387040fe541573083e47469db50ac"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Jul 01 13:20:51 2011 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Jul 01 13:20:51 2011 +0200"
      },
      "message": "Merge branch \u0027sched/core-v2\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into sched/core\n"
    },
    {
      "commit": "087806b1281563e4ae7a5bce3155f894af5f4118",
      "tree": "01547cd793de4e06f633293efa530a13ff2724a6",
      "parents": [
        "d4f7c511c1c2a67eb287987cf1ce9554149030e6"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed Jun 22 23:10:26 2011 +0200"
      },
      "committer": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Mon Jun 27 20:30:10 2011 +0200"
      },
      "message": "redefine thread_group_leader() as exit_signal \u003e\u003d 0\n\nChange de_thread() to set old_leader-\u003eexit_signal \u003d -1. This is\ngood for the consistency, it is no longer the leader and all\nsub-threads have exit_signal \u003d -1 set by copy_process(CLONE_THREAD).\n\nAnd this allows us to micro-optimize thread_group_leader(), it can\nsimply check exit_signal \u003e\u003d 0. This also makes sense because we\nshould move -\u003egroup_leader from task_struct to signal_struct.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nReviewed-by: Tejun Heo \u003ctj@kernel.org\u003e\n"
    },
    {
      "commit": "e550f14dc6322e794d4e70825f63c9c99177ae8b",
      "tree": "64f918a0d70f82842211a3c0d54ca658877b5b5d",
      "parents": [
        "0976a03e5ce8ec346e985f21046d7a75bb7fdffd"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed Jun 22 23:09:54 2011 +0200"
      },
      "committer": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Mon Jun 27 20:30:09 2011 +0200"
      },
      "message": "kill task_detached()\n\nUpadate the last user of task_detached(), wait_task_zombie(), to\nuse thread_group_leader() and kill task_detached().\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nReviewed-by: Tejun Heo \u003ctj@kernel.org\u003e\n"
    },
    {
      "commit": "8677347378044ab564470bced2275520efb3670d",
      "tree": "61baa72f24bb12eadd6956fb0abeb7eabda46b88",
      "parents": [
        "9843a1e977977986d0a4c1000f2229b032572534"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed Jun 22 23:09:09 2011 +0200"
      },
      "committer": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Mon Jun 27 20:30:09 2011 +0200"
      },
      "message": "make do_notify_parent() __must_check, update the callers\n\nChange other callers of do_notify_parent() to check the value it\nreturns, this makes the subsequent task_detached() unnecessary.\nMark do_notify_parent() as __must_check.\n\nUse thread_group_leader() instead of !task_detached() to check\nif we need to notify the real parent in wait_task_zombie().\n\nRemove the stale comment in release_task(). \"just for sanity\" is\nno longer true, we have to set EXIT_DEAD to avoid the races with\ndo_wait().\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\n"
    },
    {
      "commit": "53c8f9f199b239668e6b1a907735ee323a0d1ccd",
      "tree": "785afb9c72a2df27cd6802cf311df18711c59b76",
      "parents": [
        "06d984737bac0545fe20bb5447ee488b95adb531"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed Jun 22 23:08:18 2011 +0200"
      },
      "committer": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Mon Jun 27 20:30:08 2011 +0200"
      },
      "message": "make do_notify_parent() return bool\n\n- change do_notify_parent() to return a boolean, true if the task should\n  be reaped because its parent ignores SIGCHLD.\n\n- update the only caller which checks the returned value, exit_notify().\n\nThis temporary uglifies exit_notify() even more, will be cleanuped by\nthe next change.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\n"
    },
    {
      "commit": "544b2c91a9f14f9565af1972203438b7f49afd48",
      "tree": "38615eeed1e50580a2341b5a9d15c98793d33c2d",
      "parents": [
        "fb1d910c178ba0c5bc32d3e5a9e82e05b7aad3cd"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 14 11:20:18 2011 +0200"
      },
      "committer": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Thu Jun 16 21:41:54 2011 +0200"
      },
      "message": "ptrace: implement PTRACE_LISTEN\n\nThe previous patch implemented async notification for ptrace but it\nonly worked while trace is running.  This patch introduces\nPTRACE_LISTEN which is suggested by Oleg Nestrov.\n\nIt\u0027s allowed iff tracee is in STOP trap and puts tracee into\nquasi-running state - tracee never really runs but wait(2) and\nptrace(2) consider it to be running.  While ptracer is listening,\ntracee is allowed to re-enter STOP to notify an async event.\nListening state is cleared on the first notification.  Ptracer can\nalso clear it by issuing INTERRUPT - tracee will re-trap into STOP\nwith listening state cleared.\n\nThis allows ptracer to monitor group stop state without running tracee\n- use INTERRUPT to put tracee into STOP trap, issue LISTEN and then\nwait(2) to wait for the next group stop event.  When it happens,\nPTRACE_GETSIGINFO provides information to determine the current state.\n\nTest program follows.\n\n  #define PTRACE_SEIZE\t\t0x4206\n  #define PTRACE_INTERRUPT\t0x4207\n  #define PTRACE_LISTEN\t\t0x4208\n\n  #define PTRACE_SEIZE_DEVEL\t0x80000000\n\n  static const struct timespec ts1s \u003d { .tv_sec \u003d 1 };\n\n  int main(int argc, char **argv)\n  {\n\t  pid_t tracee, tracer;\n\t  int i;\n\n\t  tracee \u003d fork();\n\t  if (!tracee)\n\t\t  while (1)\n\t\t\t  pause();\n\n\t  tracer \u003d fork();\n\t  if (!tracer) {\n\t\t  siginfo_t si;\n\n\t\t  ptrace(PTRACE_SEIZE, tracee, NULL,\n\t\t\t (void *)(unsigned long)PTRACE_SEIZE_DEVEL);\n\t\t  ptrace(PTRACE_INTERRUPT, tracee, NULL, NULL);\n\t  repeat:\n\t\t  waitid(P_PID, tracee, NULL, WSTOPPED);\n\n\t\t  ptrace(PTRACE_GETSIGINFO, tracee, NULL, \u0026si);\n\t\t  if (!si.si_code) {\n\t\t\t  printf(\"tracer: SIG %d\\n\", si.si_signo);\n\t\t\t  ptrace(PTRACE_CONT, tracee, NULL,\n\t\t\t\t (void *)(unsigned long)si.si_signo);\n\t\t\t  goto repeat;\n\t\t  }\n\t\t  printf(\"tracer: stopped\u003d%d signo\u003d%d\\n\",\n\t\t\t si.si_signo !\u003d SIGTRAP, si.si_signo);\n\t\t  if (si.si_signo !\u003d SIGTRAP)\n\t\t\t  ptrace(PTRACE_LISTEN, tracee, NULL, NULL);\n\t\t  else\n\t\t\t  ptrace(PTRACE_CONT, tracee, NULL, NULL);\n\t\t  goto repeat;\n\t  }\n\n\t  for (i \u003d 0; i \u003c 3; i++) {\n\t\t  nanosleep(\u0026ts1s, NULL);\n\t\t  printf(\"mother: SIGSTOP\\n\");\n\t\t  kill(tracee, SIGSTOP);\n\t\t  nanosleep(\u0026ts1s, NULL);\n\t\t  printf(\"mother: SIGCONT\\n\");\n\t\t  kill(tracee, SIGCONT);\n\t  }\n\t  nanosleep(\u0026ts1s, NULL);\n\n\t  kill(tracer, SIGKILL);\n\t  kill(tracee, SIGKILL);\n\t  return 0;\n  }\n\nThis is identical to the program to test TRAP_NOTIFY except that\ntracee is PTRACE_LISTEN\u0027d instead of PTRACE_CONT\u0027d when group stopped.\nThis allows ptracer to monitor when group stop ends without running\ntracee.\n\n  # ./test-listen\n  tracer: stopped\u003d0 signo\u003d5\n  mother: SIGSTOP\n  tracer: SIG 19\n  tracer: stopped\u003d1 signo\u003d19\n  mother: SIGCONT\n  tracer: stopped\u003d0 signo\u003d5\n  tracer: SIG 18\n  mother: SIGSTOP\n  tracer: SIG 19\n  tracer: stopped\u003d1 signo\u003d19\n  mother: SIGCONT\n  tracer: stopped\u003d0 signo\u003d5\n  tracer: SIG 18\n  mother: SIGSTOP\n  tracer: SIG 19\n  tracer: stopped\u003d1 signo\u003d19\n  mother: SIGCONT\n  tracer: stopped\u003d0 signo\u003d5\n  tracer: SIG 18\n\n-v2: Moved JOBCTL_LISTENING check in wait_task_stopped() into\n     task_stopped_code() as suggested by Oleg.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\n"
    },
    {
      "commit": "fb1d910c178ba0c5bc32d3e5a9e82e05b7aad3cd",
      "tree": "dd889f33758a914cb538583073000bc21aeb1759",
      "parents": [
        "fca26f260c528ee51a2e451b5b200aeb528f3e09"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 14 11:20:17 2011 +0200"
      },
      "committer": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Thu Jun 16 21:41:53 2011 +0200"
      },
      "message": "ptrace: implement TRAP_NOTIFY and use it for group stop events\n\nCurrently there\u0027s no way for ptracer to find out whether group stop\nfinished other than polling with INTERRUPT - GETSIGINFO - CONT\nsequence.  This patch implements group stop notification for ptracer\nusing STOP traps.\n\nWhen group stop state of a seized tracee changes, JOBCTL_TRAP_NOTIFY\nis set, which schedules a STOP trap which is sticky - it isn\u0027t cleared\nby other traps and at least one STOP trap will happen eventually.\nSTOP trap is synchronization point for event notification and the\ntracer can determine the current group stop state by looking at the\nsignal number portion of exit code (si_status from waitid(2) or\nsi_code from PTRACE_GETSIGINFO).\n\nNotifications are generated both on start and end of group stops but,\nbecause group stop participation always happens before STOP trap, this\ndoesn\u0027t cause an extra trap while tracee is participating in group\nstop.  The symmetry will be useful later.\n\nNote that this notification works iff tracee is not trapped.\nCurrently there is no way to be notified of group stop state changes\nwhile tracee is trapped.  This will be addressed by a later patch.\n\nAn example program follows.\n\n  #define PTRACE_SEIZE\t\t0x4206\n  #define PTRACE_INTERRUPT\t0x4207\n\n  #define PTRACE_SEIZE_DEVEL\t0x80000000\n\n  static const struct timespec ts1s \u003d { .tv_sec \u003d 1 };\n\n  int main(int argc, char **argv)\n  {\n\t  pid_t tracee, tracer;\n\t  int i;\n\n\t  tracee \u003d fork();\n\t  if (!tracee)\n\t\t  while (1)\n\t\t\t  pause();\n\n\t  tracer \u003d fork();\n\t  if (!tracer) {\n\t\t  siginfo_t si;\n\n\t\t  ptrace(PTRACE_SEIZE, tracee, NULL,\n\t\t\t (void *)(unsigned long)PTRACE_SEIZE_DEVEL);\n\t\t  ptrace(PTRACE_INTERRUPT, tracee, NULL, NULL);\n\t  repeat:\n\t\t  waitid(P_PID, tracee, NULL, WSTOPPED);\n\n\t\t  ptrace(PTRACE_GETSIGINFO, tracee, NULL, \u0026si);\n\t\t  if (!si.si_code) {\n\t\t\t  printf(\"tracer: SIG %d\\n\", si.si_signo);\n\t\t\t  ptrace(PTRACE_CONT, tracee, NULL,\n\t\t\t\t (void *)(unsigned long)si.si_signo);\n\t\t\t  goto repeat;\n\t\t  }\n\t\t  printf(\"tracer: stopped\u003d%d signo\u003d%d\\n\",\n\t\t\t si.si_signo !\u003d SIGTRAP, si.si_signo);\n\t\t  ptrace(PTRACE_CONT, tracee, NULL, NULL);\n\t\t  goto repeat;\n\t  }\n\n\t  for (i \u003d 0; i \u003c 3; i++) {\n\t\t  nanosleep(\u0026ts1s, NULL);\n\t\t  printf(\"mother: SIGSTOP\\n\");\n\t\t  kill(tracee, SIGSTOP);\n\t\t  nanosleep(\u0026ts1s, NULL);\n\t\t  printf(\"mother: SIGCONT\\n\");\n\t\t  kill(tracee, SIGCONT);\n\t  }\n\t  nanosleep(\u0026ts1s, NULL);\n\n\t  kill(tracer, SIGKILL);\n\t  kill(tracee, SIGKILL);\n\t  return 0;\n  }\n\nIn the above program, tracer keeps tracee running and gets\nnotification of each group stop state changes.\n\n  # ./test-notify\n  tracer: stopped\u003d0 signo\u003d5\n  mother: SIGSTOP\n  tracer: SIG 19\n  tracer: stopped\u003d1 signo\u003d19\n  mother: SIGCONT\n  tracer: stopped\u003d0 signo\u003d5\n  tracer: SIG 18\n  mother: SIGSTOP\n  tracer: SIG 19\n  tracer: stopped\u003d1 signo\u003d19\n  mother: SIGCONT\n  tracer: stopped\u003d0 signo\u003d5\n  tracer: SIG 18\n  mother: SIGSTOP\n  tracer: SIG 19\n  tracer: stopped\u003d1 signo\u003d19\n  mother: SIGCONT\n  tracer: stopped\u003d0 signo\u003d5\n  tracer: SIG 18\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\n"
    },
    {
      "commit": "73ddff2bee159ffb580bd24faf625cd5e628f5ec",
      "tree": "218cf5101b67c98ef99814e59706976d3ad245c2",
      "parents": [
        "dd1d6772692316fe35094085c5e4d9a370ad3462"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 14 11:20:14 2011 +0200"
      },
      "committer": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Thu Jun 16 21:41:52 2011 +0200"
      },
      "message": "job control: introduce JOBCTL_TRAP_STOP and use it for group stop trap\n\ndo_signal_stop() implemented both normal group stop and trap for group\nstop while ptraced.  This approach has been enough but scheduled\nchanges require trap mechanism which can be used in more generic\nmanner and using group stop trap for generic trap site simplifies both\nuserland visible interface and implementation.\n\nThis patch adds a new jobctl flag - JOBCTL_TRAP_STOP.  When set, it\ntriggers a trap site, which behaves like group stop trap, in\nget_signal_to_deliver() after checking for pending signals.  While\nptraced, do_signal_stop() doesn\u0027t stop itself.  It initiates group\nstop if requested and schedules JOBCTL_TRAP_STOP and returns.  The\ncaller - get_signal_to_deliver() - is responsible for checking whether\nTRAP_STOP is pending afterwards and handling it.\n\nptrace_attach() is updated to use JOBCTL_TRAP_STOP instead of\nJOBCTL_STOP_PENDING and __ptrace_unlink() to clear all pending trap\nbits and TRAPPING so that TRAP_STOP and future trap bits don\u0027t linger\nafter detach.\n\nWhile at it, add proper function comment to do_signal_stop() and make\nit return bool.\n\n-v2: __ptrace_unlink() updated to clear JOBCTL_TRAP_MASK and TRAPPING\n     instead of JOBCTL_PENDING_MASK.  This avoids accidentally\n     clearing JOBCTL_STOP_CONSUME.  Spotted by Oleg.\n\n-v3: do_signal_stop() updated to return %false without dropping\n     siglock while ptraced and TRAP_STOP check moved inside for(;;)\n     loop after group stop participation.  This avoids unnecessary\n     relocking and also will help avoiding unnecessary traps by\n     consuming group stop before handling pending traps.\n\n-v4: Jobctl trap handling moved into a separate function -\n     do_jobctl_trap().\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\n"
    },
    {
      "commit": "bdd4e85dc36cdbcfc1608a5b2a17c80a9db8986a",
      "tree": "9cee98e78a5aa6a00f3b7ce805b1e39a0137b4a4",
      "parents": [
        "2da8c8bc44b572cbf623629ff736608dc7968436"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Wed Jun 08 01:13:27 2011 +0200"
      },
      "committer": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Fri Jun 10 15:15:40 2011 +0200"
      },
      "message": "sched: Isolate preempt counting in its own config option\n\nCreate a new CONFIG_PREEMPT_COUNT that handles the inc/dec\nof preempt count offset independently. So that the offset\ncan be updated by preempt_disable() and preempt_enable()\neven without the need for CONFIG_PREEMPT beeing set.\n\nThis prepares to make CONFIG_DEBUG_SPINLOCK_SLEEP working\nwith !CONFIG_PREEMPT where it currently doesn\u0027t detect\ncode that sleeps inside explicit preemption disabled\nsections.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nAcked-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\n"
    },
    {
      "commit": "6715a52a581c891e9a2034abe1c81ddb482d70b3",
      "tree": "03bac8851232d11382af718c2d10559cc16e4f0f",
      "parents": [
        "ef2398019b305827ea7130ebaf7bf521b444530e",
        "6c6c54e1807faf116724451ef2bd14993780470a"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Jun 07 19:20:28 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Jun 07 19:20:28 2011 -0700"
      },
      "message": "Merge branch \u0027sched-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027sched-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n  sched: Fix/clarify set_task_cpu() locking rules\n  lockdep: Fix lock_is_held() on recursion\n  sched: Fix schedstat.nr_wakeups_migrate\n  sched: Fix cross-cpu clock sync on remote wakeups\n"
    },
    {
      "commit": "7dd3db54e77d21eb95e145f19ba53f68250d0e73",
      "tree": "628e44b22e6fbf2828cf2c533c41b3d24f3e3ec9",
      "parents": [
        "6dfca32984237a8a011b5bf367e53341a265b2a4"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Thu Jun 02 11:14:00 2011 +0200"
      },
      "committer": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Sat Jun 04 18:17:11 2011 +0200"
      },
      "message": "job control: introduce task_set_jobctl_pending()\n\ntask-\u003ejobctl currently hosts JOBCTL_STOP_PENDING and will host TRAP\npending bits too.  Setting pending conditions on a dying task may make\nthe task unkillable.  Currently, each setting site is responsible for\nchecking for the condition but with to-be-added job control traps this\nbecomes too fragile.\n\nThis patch adds task_set_jobctl_pending() which should be used when\nsetting task-\u003ejobctl bits to schedule a stop or trap.  The function\nperforms the followings to ease setting pending bits.\n\n* Sanity checks.\n\n* If fatal signal is pending or PF_EXITING is set, no bit is set.\n\n* STOP_SIGMASK is automatically cleared if new value is being set.\n\ndo_signal_stop() and ptrace_attach() are updated to use\ntask_set_jobctl_pending() instead of setting STOP_PENDING explicitly.\nThe surrounding structures around setting are changed to fit\ntask_set_jobctl_pending() better but there should be no userland\nvisible behavior difference.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\n"
    }
  ],
  "next": "3759a0d94c18764247b66511d1038f2b93aa95de"
}