)]}' { "log": [ { "commit": "fa9dc265ace9774e62f0e31108e5f47911124bda", "tree": "f5230efca0ccf0cfec7690a6c45209cff938d740", "parents": [ "cf77e988ddfc7f047ac1ddc72cadb5eee7e09293" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Wed May 19 09:37:41 2010 +0900" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed May 19 11:48:18 2010 -0700" }, "message": "cpumask: fix compat getaffinity\n\nCommit a45185d2d \"cpumask: convert kernel/compat.c\" broke libnuma, which\nabuses sched_getaffinity to find out NR_CPUS in order to parse\n/sys/devices/system/node/node*/cpumap.\n\nOn NUMA systems with less than 32 possibly CPUs, the current\ncompat_sys_sched_getaffinity now returns \u00274\u0027 instead of the actual\nNR_CPUS/8, which makes libnuma bail out when parsing the cpumap.\n\nThe libnuma call sched_getaffinity(0, bitmap, 4096) at first. It mean\nthe libnuma expect the return value of sched_getaffinity() is either len\nargument or NR_CPUS. But it doesn\u0027t expect to return nr_cpu_ids.\n\nStrictly speaking, userland requirement are\n\n1) Glibc assume the return value mean the lengh of initialized\n of mask argument. E.g. if sched_getaffinity(1024) return 128,\n glibc make zero fill rest 896 byte.\n2) Libnuma assume the return value can be used to guess NR_CPUS\n in kernel. It assume len-arg\u003cNR_CPUS makes -EINVAL. But\n it try len\u003d4096 at first and 4096 is always bigger than\n NR_CPUS. Then, if we remove strange min_length normalization,\n we never hit -EINVAL case.\n\nsched_getaffinity() already solved this issue. This patch adapts\ncompat_sys_sched_getaffinity() to match the non-compat case.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nAcked-by: Arnd Bergmann \u003carnd@arndb.de\u003e\nReported-by: Ken Werner \u003cken.werner@web.de\u003e\nCc: stable@kernel.org\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ba0234ec35127fe21d373db53cbaf9fe20620cb6", "tree": "a2cbef204482512ae9e723f2bf4d22051975ef45", "parents": [ "537b60d17894b7c19a6060feae40299d7109d6e7", "939e379e9e183ae6291ac7caa4a5e1dfadae4ccc" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed May 19 11:35:30 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed May 19 11:35:30 2010 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git390.marist.edu/pub/scm/linux-2.6\n\n* \u0027for-linus\u0027 of git://git390.marist.edu/pub/scm/linux-2.6: (24 commits)\n [S390] drivers/s390/char: Use kmemdup\n [S390] drivers/s390/char: Use kstrdup\n [S390] debug: enable exception-trace debug facility\n [S390] s390_hypfs: Add new attributes\n [S390] qdio: remove API wrappers\n [S390] qdio: set correct bit in dsci\n [S390] qdio: dont convert timestamps to microseconds\n [S390] qdio: remove memset hack\n [S390] qdio: prevent starvation on PCI devices\n [S390] qdio: count number of qdio interrupts\n [S390] user space fault: report fault before calling do_exit\n [S390] topology: expose core identifier\n [S390] dasd: remove uid from devmap\n [S390] dasd: add dynamic pav toleration\n [S390] vdso: add missing vdso_install target\n [S390] vdso: remove redundant check for CONFIG_64BIT\n [S390] avoid default_llseek in s390 drivers\n [S390] vmcp: disallow modular build\n [S390] add breaking event address for user space\n [S390] virtualization aware cpu measurement\n ...\n" }, { "commit": "752f114fb83c5839de37a250b4f8257ed5438341", "tree": "c565c3b6670d21ad7f5cd6cdda5864a76d3f2e0c", "parents": [ "b8ae30ee26d379db436b0b8c8c3ff1b52f69e5d1", "ad56b0797e67df5e04b2f1a1e02900145c5c16f2" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 18 08:35:04 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 18 08:35:04 2010 -0700" }, "message": "Merge branch \u0027tracing-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027tracing-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n tracing: Fix \"integer as NULL pointer\" warning.\n tracing: Fix tracepoint.h DECLARE_TRACE() to allow more than one header\n tracing: Make the documentation clear on trace_event boot option\n ring-buffer: Wrap open-coded WARN_ONCE\n tracing: Convert nop macros to static inlines\n tracing: Fix sleep time function profiling\n tracing: Show sample std dev in function profiling\n tracing: Add documentation for trace commands mod, traceon/traceoff\n ring-buffer: Make benchmark handle missed events\n ring-buffer: Make non-consuming read less expensive with lots of cpus.\n tracing: Add graph output support for irqsoff tracer\n tracing: Have graph flags passed in to ouput functions\n tracing: Add ftrace events for graph tracer\n tracing: Dump either the oops\u0027s cpu source or all cpus buffers\n tracing: Fix uninitialized variable of tracing/trace output\n" }, { "commit": "b8ae30ee26d379db436b0b8c8c3ff1b52f69e5d1", "tree": "506aa0b4bdbf90f61e7e9261c7db90aa1452dcce", "parents": [ "4d7b4ac22fbec1a03206c6cde353f2fd6942f828", "9c6f7e43b4e02c161b53e97ba913855246876c61" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 18 08:27:54 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 18 08:27:54 2010 -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: (49 commits)\n stop_machine: Move local variable closer to the usage site in cpu_stop_cpu_callback()\n sched, wait: Use wrapper functions\n sched: Remove a stale comment\n ondemand: Make the iowait-is-busy time a sysfs tunable\n ondemand: Solve a big performance issue by counting IOWAIT time as busy\n sched: Intoduce get_cpu_iowait_time_us()\n sched: Eliminate the ts-\u003eidle_lastupdate field\n sched: Fold updating of the last_update_time_info into update_ts_time_stats()\n sched: Update the idle statistics in get_cpu_idle_time_us()\n sched: Introduce a function to update the idle statistics\n sched: Add a comment to get_cpu_idle_time_us()\n cpu_stop: add dummy implementation for UP\n sched: Remove rq argument to the tracepoints\n rcu: need barrier() in UP synchronize_sched_expedited()\n sched: correctly place paranioa memory barriers in synchronize_sched_expedited()\n sched: kill paranoia check in synchronize_sched_expedited()\n sched: replace migration_thread with cpu_stop\n stop_machine: reimplement using cpu_stop\n cpu_stop: implement stop_cpu[s]()\n sched: Fix select_idle_sibling() logic in select_task_rq_fair()\n ...\n" }, { "commit": "4d7b4ac22fbec1a03206c6cde353f2fd6942f828", "tree": "2d96a9e9c28cf6fa628a278decc00ad55a8b043b", "parents": [ "3aaf51ace5975050ab43c7d4d7e439e0ae7d13d7", "94f3ca95787ada3d64339a4ecb2754236ab563f6" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 18 08:19:03 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 18 08:19:03 2010 -0700" }, "message": "Merge branch \u0027perf-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027perf-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (311 commits)\n perf tools: Add mode to build without newt support\n perf symbols: symbol inconsistency message should be done only at verbose\u003d1\n perf tui: Add explicit -lslang option\n perf options: Type check all the remaining OPT_ variants\n perf options: Type check OPT_BOOLEAN and fix the offenders\n perf options: Check v type in OPT_U?INTEGER\n perf options: Introduce OPT_UINTEGER\n perf tui: Add workaround for slang \u003c 2.1.4\n perf record: Fix bug mismatch with -c option definition\n perf options: Introduce OPT_U64\n perf tui: Add help window to show key associations\n perf tui: Make \u003c- exit menus too\n perf newt: Add single key shortcuts for zoom into DSO and threads\n perf newt: Exit browser unconditionally when CTRL+C, q or Q is pressed\n perf newt: Fix the \u0027A\u0027/\u0027a\u0027 shortcut for annotate\n perf newt: Make \u003c- exit the ui_browser\n x86, perf: P4 PMU - fix counters management logic\n perf newt: Make \u003c- zoom out filters\n perf report: Report number of events, not samples\n perf hist: Clarify events_stats fields usage\n ...\n\nFix up trivial conflicts in kernel/fork.c and tools/perf/builtin-record.c\n" }, { "commit": "3aaf51ace5975050ab43c7d4d7e439e0ae7d13d7", "tree": "3ceb741d8b78c6dc78be3fd2e4f8aac443044787", "parents": [ "f262af3d08d3fffc4e11277d3a177b2d67ea2aba", "cc49b092d308f8ea8634134b0d95d831a88a674b" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 18 08:18:07 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 18 08:18:07 2010 -0700" }, "message": "Merge branch \u0027oprofile-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027oprofile-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (24 commits)\n oprofile/x86: make AMD IBS hotplug capable\n oprofile/x86: notify cpus only when daemon is running\n oprofile/x86: reordering some functions\n oprofile/x86: stop disabled counters in nmi handler\n oprofile/x86: protect cpu hotplug sections\n oprofile/x86: remove CONFIG_SMP macros\n oprofile/x86: fix uninitialized counter usage during cpu hotplug\n oprofile/x86: remove duplicate IBS capability check\n oprofile/x86: move IBS code\n oprofile/x86: return -EBUSY if counters are already reserved\n oprofile/x86: moving shutdown functions\n oprofile/x86: reserve counter msrs pairwise\n oprofile/x86: rework error handler in nmi_setup()\n oprofile: update file list in MAINTAINERS file\n oprofile: protect from not being in an IRQ context\n oprofile: remove double ring buffering\n ring-buffer: Add lost event count to end of sub buffer\n tracing: Show the lost events in the trace_pipe output\n ring-buffer: Add place holder recording of dropped events\n tracing: Fix compile error in module tracepoints when MODULE_UNLOAD not set\n ...\n" }, { "commit": "f262af3d08d3fffc4e11277d3a177b2d67ea2aba", "tree": "cf5e4ac1bc39fe46cfbf4d17a0e9c71ee43b9728", "parents": [ "1014cfe2fb4cdd663137aafb21448cb613dd6a7d", "72d5a9f7a9542f88397558c65bcfc3b115a65e34" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 18 08:17:58 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 18 08:17:58 2010 -0700" }, "message": "Merge branch \u0027core-rcu-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027core-rcu-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (24 commits)\n rcu: remove all rcu head initializations, except on_stack initializations\n rcu head introduce rcu head init on stack\n Debugobjects transition check\n rcu: fix build bug in RCU_FAST_NO_HZ builds\n rcu: RCU_FAST_NO_HZ must check RCU dyntick state\n rcu: make SRCU usable in modules\n rcu: improve the RCU CPU-stall warning documentation\n rcu: reduce the number of spurious RCU_SOFTIRQ invocations\n rcu: permit discontiguous cpu_possible_mask CPU numbering\n rcu: improve RCU CPU stall-warning messages\n rcu: print boot-time console messages if RCU configs out of ordinary\n rcu: disable CPU stall warnings upon panic\n rcu: enable CPU_STALL_VERBOSE by default\n rcu: slim down rcutiny by removing rcu_scheduler_active and friends\n rcu: refactor RCU\u0027s context-switch handling\n rcu: rename rcutiny rcu_ctrlblk to rcu_sched_ctrlblk\n rcu: shrink rcutiny by making synchronize_rcu_bh() be inline\n rcu: fix now-bogus rcu_scheduler_active comments.\n rcu: Fix bogus CONFIG_PROVE_LOCKING in comments to reflect reality.\n rcu: ignore offline CPUs in last non-dyntick-idle CPU check\n ...\n" }, { "commit": "1014cfe2fb4cdd663137aafb21448cb613dd6a7d", "tree": "13b5fc4e7036b4226d94bd33aefb74a3dbb25b6a", "parents": [ "8123d8f17d8ba9d67e556688e4f025456ca97842", "4726f2a617ebd868a4fdeb5679613b897e5f1676" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 18 08:17:35 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 18 08:17:35 2010 -0700" }, "message": "Merge branch \u0027core-locking-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027core-locking-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n lockdep: Reduce stack_trace usage\n lockdep: No need to disable preemption in debug atomic ops\n lockdep: Actually _dec_ in debug_atomic_dec\n lockdep: Provide off case for redundant_hardirqs_on increment\n lockdep: Simplify debug atomic ops\n lockdep: Fix redundant_hardirqs_on incremented with irqs enabled\n lockstat: Make lockstat counting per cpu\n i8253: Convert i8253_lock to raw_spinlock\n" }, { "commit": "9c6f7e43b4e02c161b53e97ba913855246876c61", "tree": "f305ceacff1af61d53bcdd403fced5fef54a7ef0", "parents": [ "a93d2f1744206827ccf416e2cdc5018aa503314e" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue May 18 00:17:44 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue May 18 00:17:44 2010 +0200" }, "message": "stop_machine: Move local variable closer to the usage site in cpu_stop_cpu_callback()\n\nThis addresses the following compiler warning:\n\n kernel/stop_machine.c: In function \u0027cpu_stop_cpu_callback\u0027:\n kernel/stop_machine.c:297: warning: unused variable \u0027work\u0027\n\nCc: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003ctip-3fc1f1e27a5b807791d72e5d992aa33b668a6626@git.kernel.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "3d2c978e0cd8b1157f9eebd13062d61fb7a75ad5", "tree": "d7e221e70d14aae2b4e5972ed9715a2cb18a3b98", "parents": [ "81880d603d00c645e0890d0a44d50711c503b72b", "b8bc1389b74c2b66255651a6fcfae56c78b6e63f" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon May 17 13:48:10 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon May 17 13:48:10 2010 -0700" }, "message": "Merge branch \u0027bkl/core\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing\n\n* \u0027bkl/core\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing:\n ptrace: Cleanup useless header\n ptrace: kill BKL in ptrace syscall\n" }, { "commit": "ab3c68ee5fd329ba48094d3417fd60e30ea14a87", "tree": "e5c3daa56821c33ea80b6853b4f817193b22df99", "parents": [ "57b28f66316d287b9dbf7b28358ca90257230769" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Mon May 17 10:00:21 2010 +0200" }, "committer": { "name": "Martin Schwidefsky", "email": "sky@mschwide.boeblingen.de.ibm.com", "time": "Mon May 17 10:00:17 2010 +0200" }, "message": "[S390] debug: enable exception-trace debug facility\n\nThe exception-trace facility on x86 and other architectures prints\ntraces to dmesg whenever a user space application crashes.\ns390 has such a feature since ages however it is called\nuserprocess_debug and is enabled differently.\nThis patch makes sure that whenever one of the two procfs files\n\n/proc/sys/kernel/userprocess_debug\n/proc/sys/debug/exception-trace\n\nis modified the contents of the second one changes as well.\nThat way we keep backwards compatibilty but also support the same\ninterface like other architectures do.\nBesides that the output of the traces is improved since it will now\nalso contain the corresponding filename of the vma (when available)\nwhere the process caused a fault or trap.\n\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nSigned-off-by: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\n" }, { "commit": "16a2164bb03612efe79a76c73da6da44445b9287", "tree": "980cb743acfe0a295d3bc70c263abcd20fd6ba80", "parents": [ "bfcc6e2eca507819e297a4c758ebd6b26e625330" ], "author": { "name": "Hugh Dickins", "email": "hughd@google.com", "time": "Fri May 14 19:44:10 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri May 14 19:45:06 2010 -0700" }, "message": "profile: fix stats and data leakage\n\nIf the kernel is large or the profiling step small, /proc/profile\nleaks data and readprofile shows silly stats, until readprofile -r\nhas reset the buffer: clear the prof_buffer when it is vmalloc()ed.\n\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nCc: stable@kernel.org\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ad56b0797e67df5e04b2f1a1e02900145c5c16f2", "tree": "1569bed80a4de531afb88cac9d60ef8bd0aa89f2", "parents": [ "668eb65f092902eb7dd526af73d4a7f025a94612", "b57f95a38233a2e73b679bea4a5453a1cc2a1cc9" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu May 13 08:11:26 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu May 13 08:11:29 2010 +0200" }, "message": "Merge commit \u0027v2.6.34-rc7\u0027 into tracing/core\n\nMerge reason: Update from -rc5 to -rc7.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "747388d78a0ae768fd82b55c4ed38aa646a72364", "tree": "03efabf9761209cffef4e8da9b6989887f76428e", "parents": [ "7f0f15464185a92f9d8791ad231bcd7bf6df54e4" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Tue May 11 14:06:59 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 11 17:33:42 2010 -0700" }, "message": "memcg: fix css_is_ancestor() RCU locking\n\nSome callers (in memcontrol.c) calls css_is_ancestor() without\nrcu_read_lock. Because css_is_ancestor() has to access RCU protected\ndata, it should be under rcu_read_lock().\n\nThis makes css_is_ancestor() itself does safe access to RCU protected\narea. (At least, \"root\" can have refcnt\u003d\u003d0 if it\u0027s not an ancestor of\n\"child\". So, we need rcu_read_lock().)\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7f0f15464185a92f9d8791ad231bcd7bf6df54e4", "tree": "a1d4f4c39632659497963b0ccf62828237478d72", "parents": [ "11cad320a4f4bc53d3585c85600c782faa12b99e" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Tue May 11 14:06:58 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 11 17:33:42 2010 -0700" }, "message": "memcg: fix css_id() RCU locking for real\n\nCommit ad4ba375373937817404fd92239ef4cadbded23b (\"memcg: css_id() must be\ncalled under rcu_read_lock()\") modifies memcontol.c for fixing RCU check\nmessage. But Andrew Morton pointed out that the fix doesn\u0027t seems sane\nand it was just for hidining lockdep messages.\n\nThis is a patch for do proper things. Checking again, all places,\naccessing without rcu_read_lock, that commit fixies was intentional....\nall callers of css_id() has reference count on it. So, it\u0027s not necessary\nto be under rcu_read_lock().\n\nConsidering again, we can use rcu_dereference_check for css_id(). We know\ncss-\u003eid is valid if css-\u003erefcnt \u003e 0. (css-\u003eid never changes and freed\nafter css-\u003erefcnt going to be 0.)\n\nThis patch makes use of rcu_dereference_check() in css_id/depth and remove\nunnecessary rcu-read-lock added by the commit.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "11cad320a4f4bc53d3585c85600c782faa12b99e", "tree": "6e246590d7905d42b7e298817e1df90381a1e9e4", "parents": [ "ab941e0fff3947b6dcc9c578d918d1bba54a6874" ], "author": { "name": "Vitaliy Gusev", "email": "vgusev@openvz.org", "time": "Tue May 11 14:06:56 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 11 17:33:42 2010 -0700" }, "message": "bsdacct: use del_timer_sync() in acct_exit_ns()\n\nacct_exit_ns --\u003e acct_file_reopen deletes timer without check timer\nexecution on other CPUs. So acct_timeout() can change an unmapped memory.\n\nSigned-off-by: Vitaliy Gusev \u003cvgusev@openvz.org\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "475f9aa6aa538befcbd0fa95bdebada600f247cd", "tree": "204167585e965b67a3b95b972744a96069f0169a", "parents": [ "d586ebbb8814e039545d38f69029533f3f17748d" ], "author": { "name": "Vitaly Mayatskikh", "email": "v.mayatskih@gmail.com", "time": "Tue May 11 14:06:51 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 11 17:33:42 2010 -0700" }, "message": "kexec: fix OOPS in crash_kernel_shrink\n\nTwo \"echo 0 \u003e /sys/kernel/kexec_crash_size\" OOPSes kernel. Also content\nof this file is invalid after first shrink to zero: it shows 1 instead of\n0.\n\nThis scenario is unlikely to happen often (root privs, valid crashkernel\u003d\nin cmdline, dump-capture kernel not loaded), I hit it only by chance.\n\nThis patch fixes it.\n\nSigned-off-by: Vitaly Mayatskikh \u003cv.mayatskih@gmail.com\u003e\nCc: Cong Wang \u003camwang@redhat.com\u003e\nCc: Neil Horman \u003cnhorman@tuxdriver.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "34441427aab4bdb3069a4ffcda69a99357abcb2e", "tree": "3beebde910f25b0945e9105017fd743c9e5241a5", "parents": [ "3c904afd7358e9ef515eb5df36b6f25c2b7fc2da" ], "author": { "name": "Robin Holt", "email": "holt@sgi.com", "time": "Tue May 11 14:06:46 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 11 17:33:41 2010 -0700" }, "message": "revert \"procfs: provide stack information for threads\" and its fixup commits\n\nOriginally, commit d899bf7b (\"procfs: provide stack information for\nthreads\") attempted to introduce a new feature for showing where the\nthreadstack was located and how many pages are being utilized by the\nstack.\n\nCommit c44972f1 (\"procfs: disable per-task stack usage on NOMMU\") was\napplied to fix the NO_MMU case.\n\nCommit 89240ba0 (\"x86, fs: Fix x86 procfs stack information for threads on\n64-bit\") was applied to fix a bug in ia32 executables being loaded.\n\nCommit 9ebd4eba7 (\"procfs: fix /proc/\u003cpid\u003e/stat stack pointer for kernel\nthreads\") was applied to fix a bug which had kernel threads printing a\nuserland stack address.\n\nCommit 1306d603f (\u0027proc: partially revert \"procfs: provide stack\ninformation for threads\"\u0027) was then applied to revert the stack pages\nbeing used to solve a significant performance regression.\n\nThis patch nearly undoes the effect of all these patches.\n\nThe reason for reverting these is it provides an unusable value in\nfield 28. For x86_64, a fork will result in the task-\u003estack_start\nvalue being updated to the current user top of stack and not the stack\nstart address. This unpredictability of the stack_start value makes\nit worthless. That includes the intended use of showing how much stack\nspace a thread has.\n\nOther architectures will get different values. As an example, ia64\ngets 0. The do_fork() and copy_process() functions appear to treat the\nstack_start and stack_size parameters as architecture specific.\n\nI only partially reverted c44972f1 (\"procfs: disable per-task stack usage\non NOMMU\") . If I had completely reverted it, I would have had to change\nmm/Makefile only build pagewalk.o when CONFIG_PROC_PAGE_MONITOR is\nconfigured. Since I could not test the builds without significant effort,\nI decided to not change mm/Makefile.\n\nI only partially reverted 89240ba0 (\"x86, fs: Fix x86 procfs stack\ninformation for threads on 64-bit\") . I left the KSTK_ESP() change in\nplace as that seemed worthwhile.\n\nSigned-off-by: Robin Holt \u003cholt@sgi.com\u003e\nCc: Stefani Seibold \u003cstefani@seibold.net\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Michal Simek \u003cmonstr@monstr.eu\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: \u003cstable@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": "72d5a9f7a9542f88397558c65bcfc3b115a65e34", "tree": "e46d3ad1948de45b9641d1a8b88f88bfb3809007", "parents": [ "4376030a54860dedab9d848dfa7cc700a6025c0b" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 17:12:17 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue May 11 16:10:47 2010 -0700" }, "message": "rcu: remove all rcu head initializations, except on_stack initializations\n\nRemove all rcu head inits. We don\u0027t care about the RCU head state before passing\nit to call_rcu() anyway. Only leave the \"on_stack\" variants so debugobjects can\nkeep track of objects on stack.\n\nSigned-off-by: Mathieu Desnoyers \u003cmathieu.desnoyers@efficios.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "a93d2f1744206827ccf416e2cdc5018aa503314e", "tree": "c4c9daf16536d8d58db275617e19898f6c5bdbd7", "parents": [ "af507ae8a0512a83728b17d8f8c5fa1561669f50" ], "author": { "name": "Changli Gao", "email": "xiaosuo@gmail.com", "time": "Fri May 07 14:33:26 2010 +0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue May 11 17:43:58 2010 +0200" }, "message": "sched, wait: Use wrapper functions\n\nepoll should not touch flags in wait_queue_t. This patch introduces a new\nfunction __add_wait_queue_exclusive(), for the users, who use wait queue as a\nLIFO queue.\n\n__add_wait_queue_tail_exclusive() is introduced too instead of\nadd_wait_queue_exclusive_locked(). remove_wait_queue_locked() is removed, as\nit is a duplicate of __remove_wait_queue(), disliked by users, and with less\nusers.\n\nSigned-off-by: Changli Gao \u003cxiaosuo@gmail.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Alexander Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Davide Libenzi \u003cdavidel@xmailserver.org\u003e\nCc: \u003ccontainers@lists.linux-foundation.org\u003e\nLKML-Reference: \u003c1273214006-2979-1-git-send-email-xiaosuo@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "96c21a460a37880abfbc8445d5b098dbab958a29", "tree": "57b6ae2ecb8713b720fb5ee86ebbf3d1b2638856", "parents": [ "050735b08ca8a016bbace4445fa025b88fee770b" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue May 11 16:19:10 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue May 11 17:08:24 2010 +0200" }, "message": "perf: Fix exit() vs event-groups\n\nCorey reported that the value scale times of group siblings are not\nupdated when the monitored task dies.\n\nThe problem appears to be that we only update the group leader\u0027s\ntime values, fix it by updating the whole group.\n\nReported-by: Corey Ashford \u003ccjashfor@linux.vnet.ibm.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Mike Galbraith \u003cefault@gmx.de\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: \u003cstable@kernel.org\u003e # .34.x\nLKML-Reference: \u003c1273588935.1810.6.camel@laptop\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "050735b08ca8a016bbace4445fa025b88fee770b", "tree": "68ce73ebb40dfcb66c9c18db9d31bfdb82c2e795", "parents": [ "e3174cfd2a1e28fff774681f00a0eef3d31da970" ], "author": { "name": "Peter Zijlstra", "email": "peterz@infradead.org", "time": "Tue May 11 11:51:53 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue May 11 15:46:43 2010 +0200" }, "message": "perf: Fix exit() vs PERF_FORMAT_GROUP\n\nBoth Stephane and Corey reported that PERF_FORMAT_GROUP didn\u0027t\nwork as expected if the task the counters were attached to quit\nbefore the read() call.\n\nThe cause is that we unconditionally destroy the grouping when\nwe remove counters from their context. Fix this by splitting off\nthe group destroy from the list removal such that\nperf_event_remove_from_context() does not do this and change\nperf_event_release() to do so.\n\nReported-by: Corey Ashford \u003ccjashfor@linux.vnet.ibm.com\u003e\nReported-by: Stephane Eranian \u003ceranian@google.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: \u003cstable@kernel.org\u003e # .34.x\nLKML-Reference: \u003c1273571513.5605.3527.camel@twins\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "e3174cfd2a1e28fff774681f00a0eef3d31da970", "tree": "5706316d689a9b1fe11df562bed391295deff537", "parents": [ "e61a639a794063d78fd248a37ce2c21d5c81fc19" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue May 11 08:31:49 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue May 11 08:31:49 2010 +0200" }, "message": "Revert \"perf: Fix exit() vs PERF_FORMAT_GROUP\"\n\nThis reverts commit 4fd38e4595e2f6c9d27732c042a0e16b2753049c.\n\nIt causes various crashes and hangs when events are activated.\n\nThe cause is not fully understood yet but we need to revert it\nbecause the effects are severe.\n\nReported-by: Stephane Eranian \u003ceranian@google.com\u003e\nReported-by: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Corey Ashford \u003ccjashfor@linux.vnet.ibm.com\u003e\nCc: Mike Galbraith \u003cefault@gmx.de\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "d822ed1094032ab524344a9a474c93128d9c2159", "tree": "36f4a24c7501c799a071384e4450a823b387d18b", "parents": [ "77e38ed347162423c6b72e06c865a121081c2bb6" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Sat May 08 19:58:22 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:35 2010 -0700" }, "message": "rcu: fix build bug in RCU_FAST_NO_HZ builds\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "77e38ed347162423c6b72e06c865a121081c2bb6", "tree": "328b746af71b47c4af97e6ea06dc24b12528a955", "parents": [ "d14aada8e20bdf81ffd43f433b123972cf575b32" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Sun Apr 25 21:04:29 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:35 2010 -0700" }, "message": "rcu: RCU_FAST_NO_HZ must check RCU dyntick state\n\nThe current version of RCU_FAST_NO_HZ reproduces the old CLASSIC_RCU\ndyntick-idle bug, as it fails to detect CPUs that have interrupted\nor NMIed out of dyntick-idle mode. Fix this by making rcu_needs_cpu()\ncheck the state in the per-CPU rcu_dynticks variables, thus correctly\ndetecting the dyntick-idle state from an RCU perspective.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "d21670acab9fcb4bc74a40b68a6941059234c55c", "tree": "6a4c054bc4dbadf0524b4e221889a8da558dbdaf", "parents": [ "4a90a0681cf6cd21cd444184302aa045156486b3" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Apr 14 17:39:26 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:35 2010 -0700" }, "message": "rcu: reduce the number of spurious RCU_SOFTIRQ invocations\n\nLai Jiangshan noted that up to 10% of the RCU_SOFTIRQ are spurious, and\ntraced this down to the fact that the current grace-period machinery\nwill uselessly raise RCU_SOFTIRQ when a given CPU needs to go through\na quiescent state, but has not yet done so. In this situation, there\nmight well be nothing that RCU_SOFTIRQ can do, and the overhead can be\nworth worrying about in the ksoftirqd case. This patch therefore avoids\nraising RCU_SOFTIRQ in this situation.\n\nChanges since v1 (http://lkml.org/lkml/2010/3/30/122 from Lai Jiangshan):\n\no\tOmit the rcu_qs_pending() prechecks, as they aren\u0027t that\n\tmuch less expensive than the quiescent-state checks.\n\no\tMerge with the set_need_resched() patch that reduces IPIs.\n\no\tAdd the new n_rp_report_qs field to the rcu_pending tracing output.\n\no\tUpdate the tracing documentation accordingly.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "4a90a0681cf6cd21cd444184302aa045156486b3", "tree": "5e54587e0844d51f6c015f4c489cbf021c9db509", "parents": [ "4300aa642cc9ecb35f2e0683dd294fb790ef028c" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Apr 14 16:48:11 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:35 2010 -0700" }, "message": "rcu: permit discontiguous cpu_possible_mask CPU numbering\n\nTREE_RCU assumes that CPU numbering is contiguous, but some users need\nlarge holes in the numbering to better map to hardware layout. This patch\nmakes TREE_RCU (and TREE_PREEMPT_RCU) tolerate large holes in the CPU\nnumbering. However, NR_CPUS must still be greater than the largest\nCPU number.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "4300aa642cc9ecb35f2e0683dd294fb790ef028c", "tree": "b70d676b02c6311a638fdaa6f3df8773b39fade1", "parents": [ "26845c2860cebebe6ce2d9d01ae3cb3db84b7e29" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Apr 13 16:18:22 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:34 2010 -0700" }, "message": "rcu: improve RCU CPU stall-warning messages\n\nThe existing RCU CPU stall-warning messages can be confusing, especially\nin the case where one CPU detects a single other stalled CPU. In addition,\nthe console messages did not say which flavor of RCU detected the stall,\nwhich can make it difficult to work out exactly what is causing the stall.\nThis commit improves these messages.\n\nRequested-by: Dhaval Giani \u003cdhaval.giani@gmail.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "26845c2860cebebe6ce2d9d01ae3cb3db84b7e29", "tree": "83849948ea7bffb5e87eecc17a7275e357740632", "parents": [ "c68de2097a8799549a3c3bf27cbfeea24a604284" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Apr 13 14:19:23 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:34 2010 -0700" }, "message": "rcu: print boot-time console messages if RCU configs out of ordinary\n\nPrint boot-time messages if tracing is enabled, if fanout is set\nto non-default values, if exact fanout is specified, if accelerated\ndyntick-idle grace periods have been enabled, if RCU-lockdep is enabled,\nif rcutorture has been boot-time enabled, if the CPU stall detector has\nbeen disabled, or if four-level hierarchy has been enabled.\n\nThis is all for TREE_RCU and TREE_PREEMPT_RCU. TINY_RCU will be handled\nseparately, if at all.\n\nSuggested-by: Josh Triplett \u003cjosh@joshtriplett.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "c68de2097a8799549a3c3bf27cbfeea24a604284", "tree": "acf2e5cb6de06185002a7d22daa91d893068551b", "parents": [ "55ec936ff4e57cc626db336a7bf33b267390e9b4" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu Apr 15 10:12:40 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:34 2010 -0700" }, "message": "rcu: disable CPU stall warnings upon panic\n\nThe current RCU CPU stall warnings remain enabled even after a panic\noccurs, which some people have found to be a bit counterproductive.\nThis patch therefore uses a notifier to disable stall warnings once a\npanic occurs.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "bbad937983147c017c25406860287cb94da9af7c", "tree": "57311598c360b92b189c7ec337146e4bc779c73d", "parents": [ "25502a6c13745f4650cc59322bd198194f55e796" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Fri Apr 02 16:17:17 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:34 2010 -0700" }, "message": "rcu: slim down rcutiny by removing rcu_scheduler_active and friends\n\nTINY_RCU does not need rcu_scheduler_active unless CONFIG_DEBUG_LOCK_ALLOC.\nSo conditionally compile rcu_scheduler_active in order to slim down\nrcutiny a bit more. Also gets rid of an EXPORT_SYMBOL_GPL, which is\nresponsible for most of the slimming.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "25502a6c13745f4650cc59322bd198194f55e796", "tree": "d76cc659d3ea797c5da4630e219ac363d17c44a6", "parents": [ "99652b54de1ee094236f7171485214071af4ef31" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu Apr 01 17:37:01 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:33 2010 -0700" }, "message": "rcu: refactor RCU\u0027s context-switch handling\n\nThe addition of preemptible RCU to treercu resulted in a bit of\nconfusion and inefficiency surrounding the handling of context switches\nfor RCU-sched and for RCU-preempt. For RCU-sched, a context switch\nis a quiescent state, pure and simple, just like it always has been.\nFor RCU-preempt, a context switch is in no way a quiescent state, but\nspecial handling is required when a task blocks in an RCU read-side\ncritical section.\n\nHowever, the callout from the scheduler and the outer loop in ksoftirqd\nstill calls something named rcu_sched_qs(), whose name is no longer\naccurate. Furthermore, when rcu_check_callbacks() notes an RCU-sched\nquiescent state, it ends up unnecessarily (though harmlessly, aside\nfrom the performance hit) enqueuing the current task if it happens to\nbe running in an RCU-preempt read-side critical section. This not only\nincreases the maximum latency of scheduler_tick(), it also needlessly\nincreases the overhead of the next outermost rcu_read_unlock() invocation.\n\nThis patch addresses this situation by separating the notion of RCU\u0027s\ncontext-switch handling from that of RCU-sched\u0027s quiescent states.\nThe context-switch handling is covered by rcu_note_context_switch() in\ngeneral and by rcu_preempt_note_context_switch() for preemptible RCU.\nThis permits rcu_sched_qs() to handle quiescent states and only quiescent\nstates. It also reduces the maximum latency of scheduler_tick(), though\nprobably by much less than a microsecond. Finally, it means that tasks\nwithin preemptible-RCU read-side critical sections avoid incurring the\noverhead of queuing unless there really is a context switch.\n\nSuggested-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nAcked-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\n" }, { "commit": "99652b54de1ee094236f7171485214071af4ef31", "tree": "fd3691aacd46a6afd9ee6ae6f38ca5e9aafb5783", "parents": [ "da848c47bc6e873a54a445ea1960423a495b6b32" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Mar 30 15:50:01 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:32 2010 -0700" }, "message": "rcu: rename rcutiny rcu_ctrlblk to rcu_sched_ctrlblk\n\nMake naming line up in preparation for CONFIG_TINY_PREEMPT_RCU.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "da848c47bc6e873a54a445ea1960423a495b6b32", "tree": "4c0eaef1a5990585730f00caca0cfcba21fe9f9f", "parents": [ "32c141a0a1dfa29e0a07d78bec0c0919fc4b9f88" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Mar 30 15:46:01 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:32 2010 -0700" }, "message": "rcu: shrink rcutiny by making synchronize_rcu_bh() be inline\n\nBecause synchronize_rcu_bh() is identical to synchronize_sched(),\nmake the former a static inline invoking the latter, saving the\noverhead of an EXPORT_SYMBOL_GPL() and the duplicate code.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "5db356736acb9ba717df1aa9444e4e44cbb30a71", "tree": "719d734fc3ef0f5fca3a7bf12a00dccfde278864", "parents": [ "0c34029abdfdea64420cb4264c4e91a776b22157" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Tue Mar 30 18:40:36 2010 +0800" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:31 2010 -0700" }, "message": "rcu: ignore offline CPUs in last non-dyntick-idle CPU check\n\nOffline CPUs are not in nohz_cpu_mask, but can be ignored when checking\nfor the last non-dyntick-idle CPU. This patch therefore only checks\nonline CPUs for not being dyntick idle, allowing fast entry into\nfull-system dyntick-idle state even when there are some offline CPUs.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "0c34029abdfdea64420cb4264c4e91a776b22157", "tree": "9025ccfef4210c04520617a4ae11ec4f24128660", "parents": [ "f261414f0d56dd1a0e34888e27d1d4902ad052f3" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Sun Mar 28 11:12:30 2010 +0800" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:31 2010 -0700" }, "message": "rcu: move some code from macro to function\n\nShrink the RCU_INIT_FLAVOR() macro by moving all but the initialization\nof the -\u003erda[] array to rcu_init_one(). The call to rcu_init_one()\ncan then be moved to the end of the RCU_INIT_FLAVOR() macro, which is\nrequired because rcu_boot_init_percpu_data(), which is now called from\nrcu_init_one(), depends on the initialization of the -\u003erda[] array.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "f261414f0d56dd1a0e34888e27d1d4902ad052f3", "tree": "6779e82e0a520121a8d1b86fbfb248bef3ab201a", "parents": [ "d25eb9442bb2c38c1e742f0fa764d7132d72593f" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Sun Mar 28 11:15:20 2010 +0800" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:31 2010 -0700" }, "message": "rcu: make dead code really dead\n\ncleanup: make dead code really dead\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "d25eb9442bb2c38c1e742f0fa764d7132d72593f", "tree": "0a2604a3b61ce7a0868c021ac945d9826e0d88f1", "parents": [ "2b3fc35f6919344e3cf722dde8308f47235c0b70" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu Mar 18 21:36:51 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:31 2010 -0700" }, "message": "rcu: substitute set_need_resched for sending resched IPIs\n\nThis patch adds a check to __rcu_pending() that does a local\nset_need_resched() if the current CPU is holding up the current grace\nperiod and if force_quiescent_state() will be called soon. The goal is\nto reduce the probability that force_quiescent_state() will need to do\nsmp_send_reschedule(), which sends an IPI and is therefore more expensive\non most architectures.\n\nSigned-off-by: \"Paul E. McKenney\" \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "2b3fc35f6919344e3cf722dde8308f47235c0b70", "tree": "2bc2cfc9c1a032d51a3d99a10e309e100b9eea4a", "parents": [ "b57f95a38233a2e73b679bea4a5453a1cc2a1cc9" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Tue Apr 20 16:23:07 2010 +0800" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:31 2010 -0700" }, "message": "rcu: optionally leave lockdep enabled after RCU lockdep splat\n\nThere is no need to disable lockdep after an RCU lockdep splat,\nso remove the debug_lockdeps_off() from lockdep_rcu_dereference().\nTo avoid repeated lockdep splats, use a static variable in the inlined\nrcu_dereference_check() and rcu_dereference_protected() macros so that\na given instance splats only once, but so that multiple instances can\nbe detected per boot.\n\nThis is controlled by a new config variable CONFIG_PROVE_RCU_REPEATEDLY,\nwhich is disabled by default. This provides the normal lockdep behavior\nby default, but permits people who want to find multiple RCU-lockdep\nsplats per boot to easily do so.\n\nRequested-by: Eric Paris \u003ceparis@redhat.com\u003e\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nTested-by: Eric Paris \u003ceparis@redhat.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "7c224a03a79021ab12ce057964df9e679af5386d", "tree": "809dbf3bcb5978e7b1845eb4c46179f1c9405f0c", "parents": [ "5bdb7934ca4115a12c7d585c5a45312b1c36909b", "b57f95a38233a2e73b679bea4a5453a1cc2a1cc9" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon May 10 13:12:26 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon May 10 13:12:29 2010 +0200" }, "message": "Merge commit \u0027v2.6.34-rc7\u0027 into oprofile\n\nMerge reason: Update to Linus\u0027s latest -rc.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "af507ae8a0512a83728b17d8f8c5fa1561669f50", "tree": "548f0ae239f62daee79d5656c6dcb791fecf7e1a", "parents": [ "19379b11819efc1fc3b602e64f7e7531050aaddb" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Mon May 10 11:24:27 2010 +0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon May 10 08:48:39 2010 +0200" }, "message": "sched: Remove a stale comment\n\nThis comment should have been removed together with uids_mutex\nwhen removing user sched.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Dhaval Giani \u003cdhaval.giani@gmail.com\u003e\nLKML-Reference: \u003c4BE77C6B.5010402@cn.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "0224cf4c5ee0d7faec83956b8e21f7d89e3df3bd", "tree": "daac87f9766d1a6c71bcff021414d3deaae40da1", "parents": [ "e0e37c200f1357db0dd986edb359c41c57d24f6e" ], "author": { "name": "Arjan van de Ven", "email": "arjan@linux.intel.com", "time": "Sun May 09 08:25:23 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun May 09 19:35:27 2010 +0200" }, "message": "sched: Intoduce get_cpu_iowait_time_us()\n\nFor the ondemand cpufreq governor, it is desired that the iowait\ntime is microaccounted in a similar way as idle time is.\n\nThis patch introduces the infrastructure to account and expose\nthis information via the get_cpu_iowait_time_us() function.\n\n[akpm@linux-foundation.org: fix CONFIG_NO_HZ\u003dn build]\nSigned-off-by: Arjan van de Ven \u003carjan@linux.intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: davej@redhat.com\nLKML-Reference: \u003c20100509082523.284feab6@infradead.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "e0e37c200f1357db0dd986edb359c41c57d24f6e", "tree": "9f799889b2166528e4b264f3c58a52d1edbd4bdf", "parents": [ "8d63bf949e330588b80d30ca8f0a27a45297a9e9" ], "author": { "name": "Arjan van de Ven", "email": "arjan@linux.intel.com", "time": "Sun May 09 08:24:39 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun May 09 19:35:26 2010 +0200" }, "message": "sched: Eliminate the ts-\u003eidle_lastupdate field\n\nNow that the only user of ts-\u003eidle_lastupdate is\nupdate_ts_time_stats(), the entire field can be eliminated.\n\nIn update_ts_time_stats(), idle_lastupdate is first set to\n\"now\", and a few lines later, the only user is an if() statement\nthat assigns a variable either to \"now\" or to\nts-\u003eidle_lastupdate, which has the value of \"now\" at that point.\n\nSigned-off-by: Arjan van de Ven \u003carjan@linux.intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: davej@redhat.com\nLKML-Reference: \u003c20100509082439.2fab0b4f@infradead.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "8d63bf949e330588b80d30ca8f0a27a45297a9e9", "tree": "e416fe04ddacdf3fc3e2c9ec6938da0ebbab7ff1", "parents": [ "8c7b09f43f4bf570654bcc458ce96819a932303c" ], "author": { "name": "Arjan van de Ven", "email": "arjan@linux.intel.com", "time": "Sun May 09 08:24:03 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun May 09 19:35:26 2010 +0200" }, "message": "sched: Fold updating of the last_update_time_info into update_ts_time_stats()\n\nThis patch folds the updating of the last_update_time into the\nupdate_ts_time_stats() function, and updates the callers.\n\nThis allows for further cleanups that are done in the next\npatch.\n\nSigned-off-by: Arjan van de Ven \u003carjan@linux.intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: davej@redhat.com\nLKML-Reference: \u003c20100509082403.60072967@infradead.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "8c7b09f43f4bf570654bcc458ce96819a932303c", "tree": "33eb6f860fa9a31ea63b67247890a6762439fde2", "parents": [ "595aac488b546c7185be7e29c8ae165a588b2a9f" ], "author": { "name": "Arjan van de Ven", "email": "arjan@linux.intel.com", "time": "Sun May 09 08:23:23 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun May 09 19:35:26 2010 +0200" }, "message": "sched: Update the idle statistics in get_cpu_idle_time_us()\n\nRight now, get_cpu_idle_time_us() only reports the idle\nstatistics upto the point the CPU entered last idle; not what is\nvalid right now.\n\nThis patch adds an update of the idle statistics to\nget_cpu_idle_time_us(), so that calling this function always\nreturns statistics that are accurate at the point of the call.\n\nThis includes resetting the start of the idle time for\naccounting purposes to avoid double accounting.\n\nSigned-off-by: Arjan van de Ven \u003carjan@linux.intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: davej@redhat.com\nLKML-Reference: \u003c20100509082323.2d2f1945@infradead.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "595aac488b546c7185be7e29c8ae165a588b2a9f", "tree": "5037879b01cbcb7cf84f4ab99a114aca687f0300", "parents": [ "b1f724c3055fa75a31d272222213647547a2d3d4" ], "author": { "name": "Arjan van de Ven", "email": "arjan@linux.intel.com", "time": "Sun May 09 08:22:45 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun May 09 19:35:25 2010 +0200" }, "message": "sched: Introduce a function to update the idle statistics\n\nCurrently, two places update the idle statistics (and more to\ncome later in this series).\n\nThis patch creates a helper function for updating these\nstatistics.\n\nSigned-off-by: Arjan van de Ven \u003carjan@linux.intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: davej@redhat.com\nLKML-Reference: \u003c20100509082245.163e67ed@infradead.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "b1f724c3055fa75a31d272222213647547a2d3d4", "tree": "9f9e9105a01405e252b5214e83bdbfcd10921f43", "parents": [ "e7858f52a5cb868289a72264534a1f05f3340c6c" ], "author": { "name": "Arjan van de Ven", "email": "arjan@linux.intel.com", "time": "Sun May 09 08:22:08 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun May 09 19:35:25 2010 +0200" }, "message": "sched: Add a comment to get_cpu_idle_time_us()\n\nThe exported function get_cpu_idle_time_us() has no comment\ndescribing it; add a kerneldoc comment\n\nSigned-off-by: Arjan van de Ven \u003carjan@linux.intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: davej@redhat.com\nLKML-Reference: \u003c20100509082208.7cb721f0@infradead.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "93135439459920c4d856f4ab8f068c030085c8df", "tree": "a53defcfe4f99258e1fc7d408114cd34baa35e0c", "parents": [ "883a2a3189dae9d2912c417e47152f51cb922a3f" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Sat May 08 06:24:25 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Sun May 09 13:45:34 2010 +0200" }, "message": "tracing: Drop the nested field from lock_release event\n\nDrop the nested field as we don\u0027t use it. Every nested state can\nbe computed from a state machine on post processing already.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Hitoshi Mitake \u003cmitake@dcl.info.waseda.ac.jp\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "883a2a3189dae9d2912c417e47152f51cb922a3f", "tree": "286a31a1d86b1e49afc79f61c9b83ca81840065b", "parents": [ "90c0e5fc7b73d2575c7367e1da70ff9521718e5e" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Sat May 08 06:16:11 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Sun May 09 13:45:32 2010 +0200" }, "message": "tracing: Drop lock_acquired waittime field\n\nDrop the waittime field from the lock_acquired event, we can\ncalculate it by substracting the lock_acquired event timestamp\nwith the matching lock_acquire one.\n\nIt is not needed and takes useless space in the traces.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Hitoshi Mitake \u003cmitake@dcl.info.waseda.ac.jp\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "e7858f52a5cb868289a72264534a1f05f3340c6c", "tree": "aa7308603cf30d8aec6e45ecaddc6c8ed29d2edb", "parents": [ "27a9da6538ee18046d7bff8e36a9f783542c54c3", "bbf1bb3eee86f2eef2baa14e600be454d09109ee" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat May 08 18:11:19 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat May 08 18:11:19 2010 +0200" }, "message": "Merge branch \u0027cpu_stop\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc into sched/core\n" }, { "commit": "c0614829c16ab9d31f1b7d40516decfbf3d32102", "tree": "3787f73258a8cc02b6608849c37bff71ce3a3272", "parents": [ "c7993165ef0c1d636ca05f4787739f8414584e6d" ], "author": { "name": "Masami Hiramatsu", "email": "mhiramat@redhat.com", "time": "Tue Apr 27 18:33:12 2010 -0400" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat May 08 18:08:30 2010 +0200" }, "message": "kprobes: Move enable/disable_kprobe() out from debugfs code\n\nMove enable/disable_kprobe() API out from debugfs related code,\nbecause these interfaces are not related to debugfs interface.\n\nThis fixes a compiler warning.\n\nSigned-off-by: Masami Hiramatsu \u003cmhiramat@redhat.com\u003e\nAcked-by: Ananth N Mavinakayanahalli \u003cananth@in.ibm.com\u003e\nAcked-by: Tony Luck \u003ctony.luck@intel.com\u003e\nCc: systemtap \u003csystemtap@sources.redhat.com\u003e\nCc: DLE \u003cdle-develop@lists.sourceforge.net\u003e\nLKML-Reference: \u003c20100427223312.2322.60512.stgit@localhost6.localdomain6\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "bbf1bb3eee86f2eef2baa14e600be454d09109ee", "tree": "f7c200742a2d6ce20e72ad976b66d30d1aa6a04d", "parents": [ "fc390cde362309f6892bb719194f242c466a978b" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Sat May 08 16:20:53 2010 +0200" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Sat May 08 17:12:33 2010 +0200" }, "message": "cpu_stop: add dummy implementation for UP\n\nWhen !CONFIG_SMP, cpu_stop functions weren\u0027t defined at all which\ncould lead to build failures if UP code uses cpu_stop facility. Add\ndummy cpu_stop implementation for UP. The waiting variants execute\nthe work function directly with preempt disabled and\nstop_one_cpu_nowait() schedules a workqueue work.\n\nMakefile and ifdefs around stop_machine implementation are updated to\naccomodate CONFIG_SMP \u0026\u0026 !CONFIG_STOP_MACHINE case.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nReported-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "6e85158cf5a2385264316870256fb6ad681156a0", "tree": "39d5a0c81c4cc54c8051a9f62b587f17b0a2077a", "parents": [ "ed82702155b6343727ee732f7eae6d72e8b453fe" ], "author": { "name": "Paul Mackerras", "email": "paulus@samba.org", "time": "Sat May 08 20:58:00 2010 +1000" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat May 08 13:16:55 2010 +0200" }, "message": "perf_event: Make software events work again\n\nCommit 6bde9b6ce0127e2a56228a2071536d422be31336 (\"perf: Add\ngroup scheduling transactional APIs\") added code to allow a\ngroup to be scheduled in a single transaction. However, it\nintroduced a bug in handling events whose pmu does not implement\ntransactions -- at the end of scheduling in the events in the\ngroup, in the non-transactional case the code now falls through\nto the group_error label, and proceeds to unschedule all the\nevents in the group and return failure.\n\nThis fixes it by returning 0 (success) in the non-transactional\ncase.\n\nSigned-off-by: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: eranian@gmail.com\nLKML-Reference: \u003c20100508105800.GB10650@brick.ozlabs.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "91bc482ec5a615e8ecebc106aaf7d0c267d511de", "tree": "ad75789a5825fb2da75b2dbdc02d1969bad9b338", "parents": [ "e8e8fade7b351f131433fa44ca5d4e960e1c0f9c", "ee84b8243b07c33a5c8aed42b4b2da60cb16d1d2" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri May 07 13:58:21 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri May 07 13:58:21 2010 -0700" }, "message": "Merge branch \u0027core-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027core-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n rcu: create rcu_my_thread_group_empty() wrapper\n memcg: css_id() must be called under rcu_read_lock()\n cgroup: Check task_lock in task_subsys_state()\n sched: Fix an RCU warning in print_task()\n cgroup: Fix an RCU warning in alloc_css_id()\n cgroup: Fix an RCU warning in cgroup_path()\n KEYS: Fix an RCU warning in the reading of user keys\n KEYS: Fix an RCU warning\n" }, { "commit": "6bde9b6ce0127e2a56228a2071536d422be31336", "tree": "1a1f2fe3dbb741d81b0c08f1822ef7c0af01f91d", "parents": [ "ab608344bcbde4f55ec4cd911b686b0ce3eae076" ], "author": { "name": "Lin Ming", "email": "ming.m.lin@intel.com", "time": "Fri Apr 23 13:56:00 2010 +0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri May 07 11:31:02 2010 +0200" }, "message": "perf: Add group scheduling transactional APIs\n\nAdd group scheduling transactional APIs to struct pmu.\nThese APIs will be implemented in arch code, based on Peter\u0027s idea as\nbelow.\n\n\u003e the idea behind hw_perf_group_sched_in() is to not perform\n\u003e schedulability tests on each event in the group, but to add the group\n\u003e as a whole and then perform one test.\n\u003e\n\u003e Of course, when that test fails, you\u0027ll have to roll-back the whole\n\u003e group again.\n\u003e\n\u003e So start_txn (or a better name) would simply toggle a flag in the pmu\n\u003e implementation that will make pmu::enable() not perform the\n\u003e schedulablilty test.\n\u003e\n\u003e Then commit_txn() will perform the schedulability test (so note the\n\u003e method has to have a !void return value.\n\u003e\n\u003e This will allow us to use the regular\n\u003e kernel/perf_event.c::group_sched_in() and all the rollback code.\n\u003e Currently each hw_perf_group_sched_in() implementation duplicates all\n\u003e the rolllback code (with various bugs).\n\n-\u003estart_txn:\nStart group events scheduling transaction, set a flag to make\npmu::enable() not perform the schedulability test, it will be performed\nat commit time.\n\n-\u003ecommit_txn:\nCommit group events scheduling transaction, perform the group\nschedulability as a whole\n\n-\u003ecancel_txn:\nStop group events scheduling transaction, clear the flag so\npmu::enable() will perform the schedulability test.\n\nReviewed-by: Stephane Eranian \u003ceranian@google.com\u003e\nReviewed-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1272002160.5707.60.camel@minggr.sh.intel.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "a0507c84bf47dfd204299774f45fd16da33f0619", "tree": "d40bf7628ebb9935fb1ef6727337dcd9e2c94fd5", "parents": [ "cce913178118b0b36742eb7544c2b38a0c957ee7" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Thu May 06 15:42:53 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri May 07 11:30:59 2010 +0200" }, "message": "perf: Annotate perf_event_read_group() vs perf_event_release_kernel()\n\nStephane reported a lockdep warning while using PERF_FORMAT_GROUP.\n\nThe issue is that perf_event_read_group() takes faults while holding\nthe ctx-\u003emutex, while perf_event_release_kernel() can be called from\nmunmap(). Which makes for an AB-BA deadlock.\n\nExcept we can never establish the deadlock because we\u0027ll only ever\ncall perf_event_release_kernel() after all file descriptors are dead\nso there is no concurrency possible.\n\nReported-by: Stephane Eranian \u003ceranian@google.com\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "cce913178118b0b36742eb7544c2b38a0c957ee7", "tree": "25a6d7b4e01fea2932e6e2962a75f7a3d8c19a4f", "parents": [ "d9f599e1e6d019968b35d2dc63074b9e8964fa69", "4fd38e4595e2f6c9d27732c042a0e16b2753049c" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri May 07 11:30:29 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri May 07 11:30:30 2010 +0200" }, "message": "Merge branch \u0027perf/urgent\u0027 into perf/core\n\nMerge reason: Resolve patch dependency\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "4fd38e4595e2f6c9d27732c042a0e16b2753049c", "tree": "bb18024a183691b81062f97fbc3de4938a1d6086", "parents": [ "722154e4cacf015161efe60009ae9be23d492296" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Thu May 06 17:31:38 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri May 07 11:30:17 2010 +0200" }, "message": "perf: Fix exit() vs PERF_FORMAT_GROUP\n\nBoth Stephane and Corey reported that PERF_FORMAT_GROUP didn\u0027t work\nas expected if the task the counters were attached to quit before\nthe read() call.\n\nThe cause is that we unconditionally destroy the grouping when we\nremove counters from their context. Fix this by only doing this when\nwe free the counter itself.\n\nReported-by: Corey Ashford \u003ccjashfor@linux.vnet.ibm.com\u003e\nReported-by: Stephane Eranian \u003ceranian@google.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1273160566.5605.404.camel@twins\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "27a9da6538ee18046d7bff8e36a9f783542c54c3", "tree": "9f9944ca8742ec52f7e4a674f7475fc0378abdb8", "parents": [ "48652ced1533c3372f996a0d83b6e73b1f1c9381" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue May 04 20:36:56 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri May 07 11:28:17 2010 +0200" }, "message": "sched: Remove rq argument to the tracepoints\n\nstruct rq isn\u0027t visible outside of sched.o so its near useless to\nexpose the pointer, also there are no users of it, so remove it.\n\nAcked-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1272997616.1642.207.camel@laptop\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "48652ced1533c3372f996a0d83b6e73b1f1c9381", "tree": "5e17729cfcdc97bf798a17b57cdb888b4ded65b0", "parents": [ "99bd5e2f245d8cd17d040c82d40becdb3efd9b69", "66f41d4c5c8a5deed66fdcc84509376c9a0bf9d8" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri May 07 11:27:54 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri May 07 11:27:54 2010 +0200" }, "message": "Merge commit \u0027v2.6.34-rc6\u0027 into sched/core\n" }, { "commit": "4726f2a617ebd868a4fdeb5679613b897e5f1676", "tree": "c9eea44c66f98123802d99aad5b3cce93626eda8", "parents": [ "54d47a2be5e7f928fb77b2f5a0761f6bd3c9dbff" ], "author": { "name": "Yong Zhang", "email": "yong.zhang@windriver.com", "time": "Tue May 04 14:16:48 2010 +0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri May 07 11:27:26 2010 +0200" }, "message": "lockdep: Reduce stack_trace usage\n\nWhen calling check_prevs_add(), if all validations passed\nadd_lock_to_list() will add new lock to dependency tree and\nalloc stack_trace for each list_entry.\n\nBut at this time, we are always on the same stack, so stack_trace\nfor each list_entry has the same value. This is redundant and eats\nup lots of memory which could lead to warning on low\nMAX_STACK_TRACE_ENTRIES.\n\nUse one copy of stack_trace instead.\n\nV2: As suggested by Peter Zijlstra, move save_trace() from\n check_prevs_add() to check_prev_add().\n Add tracking for trylock dependence which is also redundant.\n\nSigned-off-by: Yong Zhang \u003cyong.zhang0@windriver.com\u003e\nCc: David S. Miller \u003cdavem@davemloft.net\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c20100504065711.GC10784@windriver.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "fc390cde362309f6892bb719194f242c466a978b", "tree": "07bfb72fb4eff28cc515a0ff5b2d1571db4f4b69", "parents": [ "cc631fb732b8ccd6a0cc45557475ea09b0c21a68" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu May 06 11:42:52 2010 -0700" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Fri May 07 07:23:21 2010 +0200" }, "message": "rcu: need barrier() in UP synchronize_sched_expedited()\n\nIf synchronize_sched_expedited() is ever to be called from within\nkernel/sched.c in a !SMP PREEMPT kernel, the !SMP implementation needs\na barrier().\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "d9f599e1e6d019968b35d2dc63074b9e8964fa69", "tree": "6253e19189306cef7952310d6ef62fb6ab675481", "parents": [ "4778e0e8c64f683a71632dba1cff1f85f76f83c4" ], "author": { "name": "Dan Carpenter", "email": "error27@gmail.com", "time": "Sat Mar 20 17:39:11 2010 +0300" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Thu May 06 19:49:52 2010 -0400" }, "message": "perf: Fix check at end of event search\n\nThe original code doesn\u0027t work because \"call\" is never NULL there.\n\nSigned-off-by: Dan Carpenter \u003cerror27@gmail.com\u003e\nLKML-Reference: \u003c20100320143911.GF5331@bicker\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "cc631fb732b8ccd6a0cc45557475ea09b0c21a68", "tree": "37e8c84f227a21d628a9d3a96dbbf5fedd506db1", "parents": [ "94458d5ecb3da844823cc191e73e5c5ead98a464" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu May 06 18:49:21 2010 +0200" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu May 06 18:49:21 2010 +0200" }, "message": "sched: correctly place paranioa memory barriers in synchronize_sched_expedited()\n\nThe memory barriers must be in the SMP case, not in the !SMP case.\nAlso add a barrier after the atomic_inc() in order to ensure that\nother CPUs see post-synchronize_sched_expedited() actions as following\nthe expedited grace period.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "94458d5ecb3da844823cc191e73e5c5ead98a464", "tree": "866f0ed3b4e522d98664cb4b2603cd0d34cfde0d", "parents": [ "969c79215a35b06e5e3efe69b9412f858df7856c" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu May 06 18:49:21 2010 +0200" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu May 06 18:49:21 2010 +0200" }, "message": "sched: kill paranoia check in synchronize_sched_expedited()\n\nThe paranoid check which verifies that the cpu_stop callback is\nactually called on all online cpus is completely superflous. It\u0027s\nguaranteed by cpu_stop facility and if it didn\u0027t work as advertised\nother things would go horribly wrong and trying to recover using\nsynchronize_sched() wouldn\u0027t be very meaningful.\n\nKill the paranoid check. Removal of this feature is done as a\nseparate step so that it can serve as a bisection point if something\nactually goes wrong.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nAcked-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nCc: Josh Triplett \u003cjosh@freedesktop.org\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Dimitri Sivanich \u003csivanich@sgi.com\u003e\n" }, { "commit": "969c79215a35b06e5e3efe69b9412f858df7856c", "tree": "4256378687c8bc2011ec35a3e28bc3b6473e912c", "parents": [ "3fc1f1e27a5b807791d72e5d992aa33b668a6626" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu May 06 18:49:21 2010 +0200" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu May 06 18:49:21 2010 +0200" }, "message": "sched: replace migration_thread with cpu_stop\n\nCurrently migration_thread is serving three purposes - migration\npusher, context to execute active_load_balance() and forced context\nswitcher for expedited RCU synchronize_sched. All three roles are\nhardcoded into migration_thread() and determining which job is\nscheduled is slightly messy.\n\nThis patch kills migration_thread and replaces all three uses with\ncpu_stop. The three different roles of migration_thread() are\nsplitted into three separate cpu_stop callbacks -\nmigration_cpu_stop(), active_load_balance_cpu_stop() and\nsynchronize_sched_expedited_cpu_stop() - and each use case now simply\nasks cpu_stop to execute the callback as necessary.\n\nsynchronize_sched_expedited() was implemented with private\npreallocated resources and custom multi-cpu queueing and waiting\nlogic, both of which are provided by cpu_stop.\nsynchronize_sched_expedited_count is made atomic and all other shared\nresources along with the mutex are dropped.\n\nsynchronize_sched_expedited() also implemented a check to detect cases\nwhere not all the callback got executed on their assigned cpus and\nfall back to synchronize_sched(). If called with cpu hotplug blocked,\ncpu_stop already guarantees that and the condition cannot happen;\notherwise, stop_machine() would break. However, this patch preserves\nthe paranoid check using a cpumask to record on which cpus the stopper\nran so that it can serve as a bisection point if something actually\ngoes wrong theree.\n\nBecause the internal execution state is no longer visible,\nrcu_expedited_torture_stats() is removed.\n\nThis patch also renames cpu_stop threads to from \"stopper/%d\" to\n\"migration/%d\". The names of these threads ultimately don\u0027t matter\nand there\u0027s no reason to make unnecessary userland visible changes.\n\nWith this patch applied, stop_machine() and sched now share the same\nresources. stop_machine() is faster without wasting any resources and\nsched migration users are much cleaner.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nAcked-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nCc: Josh Triplett \u003cjosh@freedesktop.org\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Dimitri Sivanich \u003csivanich@sgi.com\u003e\n" }, { "commit": "3fc1f1e27a5b807791d72e5d992aa33b668a6626", "tree": "396c2f49909c506c3ad53fd6a9bdddf6c24f7860", "parents": [ "1142d810298e694754498dbb4983fcb6cb7fd884" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu May 06 18:49:20 2010 +0200" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu May 06 18:49:20 2010 +0200" }, "message": "stop_machine: reimplement using cpu_stop\n\nReimplement stop_machine using cpu_stop. As cpu stoppers are\nguaranteed to be available for all online cpus,\nstop_machine_create/destroy() are no longer necessary and removed.\n\nWith resource management and synchronization handled by cpu_stop, the\nnew implementation is much simpler. Asking the cpu_stop to execute\nthe stop_cpu() state machine on all online cpus with cpu hotplug\ndisabled is enough.\n\nstop_machine itself doesn\u0027t need to manage any global resources\nanymore, so all per-instance information is rolled into struct\nstop_machine_data and the mutex and all static data variables are\nremoved.\n\nThe previous implementation created and destroyed RT workqueues as\nnecessary which made stop_machine() calls highly expensive on very\nlarge machines. According to Dimitri Sivanich, preventing the dynamic\ncreation/destruction makes booting faster more than twice on very\nlarge machines. cpu_stop resources are preallocated for all online\ncpus and should have the same effect.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nAcked-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nAcked-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Dimitri Sivanich \u003csivanich@sgi.com\u003e\n" }, { "commit": "1142d810298e694754498dbb4983fcb6cb7fd884", "tree": "8c5d23b76f129e23d9d967182aa434795e44af5c", "parents": [ "99bd5e2f245d8cd17d040c82d40becdb3efd9b69" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu May 06 18:49:20 2010 +0200" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu May 06 18:49:20 2010 +0200" }, "message": "cpu_stop: implement stop_cpu[s]()\n\nImplement a simplistic per-cpu maximum priority cpu monopolization\nmechanism. A non-sleeping callback can be scheduled to run on one or\nmultiple cpus with maximum priority monopolozing those cpus. This is\nprimarily to replace and unify RT workqueue usage in stop_machine and\nscheduler migration_thread which currently is serving multiple\npurposes.\n\nFour functions are provided - stop_one_cpu(), stop_one_cpu_nowait(),\nstop_cpus() and try_stop_cpus().\n\nThis is to allow clean sharing of resources among stop_cpu and all the\nmigration thread users. One stopper thread per cpu is created which\nis currently named \"stopper/CPU\". This will eventually replace the\nmigration thread and take on its name.\n\n* This facility was originally named cpuhog and lived in separate\n files but Peter Zijlstra nacked the name and thus got renamed to\n cpu_stop and moved into stop_machine.c.\n\n* Better reporting of preemption leak as per Peter\u0027s suggestion.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nAcked-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Dimitri Sivanich \u003csivanich@sgi.com\u003e\n" }, { "commit": "ee84b8243b07c33a5c8aed42b4b2da60cb16d1d2", "tree": "a5b3cad55179fe8340c6422deaf6e11120222ad1", "parents": [ "ad4ba375373937817404fd92239ef4cadbded23b" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu May 06 09:28:41 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu May 06 09:28:41 2010 -0700" }, "message": "rcu: create rcu_my_thread_group_empty() wrapper\n\nSome RCU-lockdep splat repairs need to know whether they are running\nin a single-threaded process. Unfortunately, the thread_group_empty()\nprimitive is defined in sched.h, and can induce #include hell. This\ncommit therefore introduces a rcu_my_thread_group_empty() wrapper that\nis defined in rcupdate.c, thus avoiding the need to include sched.h\neverywhere.\n\nSigned-off-by: \"Paul E. McKenney\" \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "668eb65f092902eb7dd526af73d4a7f025a94612", "tree": "2ef89525a77f0541bf527dc33325969cf360c4a4", "parents": [ "2e26ca7150a4f2ab3e69471dfc65f131e7dd7a05" ], "author": { "name": "Thiago Farina", "email": "tfransosi@gmail.com", "time": "Sun Jan 24 11:03:50 2010 -0500" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 05 12:01:26 2010 -0400" }, "message": "tracing: Fix \"integer as NULL pointer\" warning.\n\nkernel/trace/trace_output.c:256:24: warning: Using plain integer as NULL pointer\n\nSigned-off-by: Thiago Farina \u003ctfransosi@gmail.com\u003e\nLKML-Reference: \u003c1264349038-1766-3-git-send-email-tfransosi@gmail.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "8777c793d6a24c7f3adf52b1b1086e9706de4589", "tree": "87817c46c895307df4f9188e7f13d1f18b0eb01e", "parents": [ "7437e7d3672b6d23c08212c68752c9a9c25f8e9e", "47dd5be2d6a82b8153e059a1d09eb3879d485bfd" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed May 05 07:56:36 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed May 05 07:56:36 2010 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:\n workqueue: flush_delayed_work: keep the original workqueue for re-queueing\n" }, { "commit": "f5fa05d97252b23b12749a7cd02710870c0762b0", "tree": "e7c5e2c78a186bd66c63a7eeb61005f5ba90f7f4", "parents": [ "f2809d61d6cf47c2ed2963ba3b4c59e709144ccb", "048c852051d2bd5da54a4488bc1f16b0fc74c695" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 04 15:16:15 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 04 15:16:15 2010 -0700" }, "message": "Merge branch \u0027perf-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027perf-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n perf: Fix resource leak in failure path of perf_event_open()\n" }, { "commit": "f2809d61d6cf47c2ed2963ba3b4c59e709144ccb", "tree": "4cfc2aadc16b52ef4562833ea838b34723e6b3fb", "parents": [ "d93ac51c7a129db7a1431d859a3ef45a0b1f3fc5", "8b46f880841aac821af8efa6581bb0e46b8b9845" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 04 15:15:43 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 04 15:15:43 2010 -0700" }, "message": "Merge branch \u0027core-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027core-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n rcu: Fix RCU lockdep splat on freezer_fork path\n rcu: Fix RCU lockdep splat in set_task_cpu on fork path\n mutex: Don\u0027t spin when the owner CPU is offline or other weird cases\n" }, { "commit": "b629317e66fb1c6066c550dded45ab85a936163c", "tree": "f618cd5bc21001144999a48bcb57c4bef725db06", "parents": [ "fae9c791703606636c1220e47f6690660042ce7f" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Thu Apr 22 17:30:40 2010 +0800" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue May 04 09:25:01 2010 -0700" }, "message": "sched: Fix an RCU warning in print_task()\n\nWith CONFIG_PROVE_RCU\u003dy, a warning can be triggered:\n\n $ cat /proc/sched_debug\n\n...\nkernel/cgroup.c:1649 invoked rcu_dereference_check() without protection!\n...\n\nBoth cgroup_path() and task_group() should be called with either\nrcu_read_lock or cgroup_mutex held.\n\nThe rcu_dereference_check() does include cgroup_lock_is_held(), so we\nknow that this lock is not held. Therefore, in a CONFIG_PREEMPT kernel,\nto say nothing of a CONFIG_PREEMPT_RT kernel, the original code could\nhave ended up copying a string out of the freelist.\n\nThis patch inserts RCU read-side primitives needed to prevent this\nscenario.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "fae9c791703606636c1220e47f6690660042ce7f", "tree": "c4d1bf20f4b73ee438ae2c3168b9b7ead1418215", "parents": [ "9a9686b634acc5cb6b7c601c171ae64af0318a24" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Thu Apr 22 17:30:00 2010 +0800" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue May 04 09:25:00 2010 -0700" }, "message": "cgroup: Fix an RCU warning in alloc_css_id()\n\nWith CONFIG_PROVE_RCU\u003dy, a warning can be triggered:\n\n # mount -t cgroup -o memory xxx /mnt\n # mkdir /mnt/0\n\n...\nkernel/cgroup.c:4442 invoked rcu_dereference_check() without protection!\n...\n\nThis is a false-positive. It\u0027s safe to directly access parent_css-\u003eid.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "9a9686b634acc5cb6b7c601c171ae64af0318a24", "tree": "4a8431117018d8883c6d34d5c06f2eff99dcfed6", "parents": [ "e35ec2d2c1fc45dd3e46dde74bb0c4c4366125bf" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Thu Apr 22 17:29:24 2010 +0800" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue May 04 09:24:59 2010 -0700" }, "message": "cgroup: Fix an RCU warning in cgroup_path()\n\nwith CONFIG_PROVE_RCU\u003dy, a warning can be triggered:\n\n # mount -t cgroup -o debug xxx /mnt\n # cat /proc/$$/cgroup\n\n...\nkernel/cgroup.c:1649 invoked rcu_dereference_check() without protection!\n...\n\nThis is a false-positive, because cgroup_path() can be called\nwith either rcu_read_lock() held or cgroup_mutex held.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "956097912c40a03bf22603a3be73503fd9ea9e44", "tree": "2d73d9dd1fed43cb1eeaa9137fefc72884e62694", "parents": [ "4dbf6bc239c169b032777616806ecc648058f6b2" ], "author": { "name": "Borislav Petkov", "email": "bp@alien8.de", "time": "Sun May 02 08:03:54 2010 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue May 04 12:23:47 2010 -0400" }, "message": "ring-buffer: Wrap open-coded WARN_ONCE\n\nWrap open-coded WARN_ONCE functionality into the equivalent macro.\n\nSigned-off-by: Borislav Petkov \u003cbp@alien8.de\u003e\nLKML-Reference: \u003c20100502060354.GA5281@liondog.tnic\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "777d0411cd1e384115985dac5ccd42031e3eee2b", "tree": "a42183583624899287cbf9c657163ce8ff97a32d", "parents": [ "0806ebd974590ab24ab357d5d87db744e56bfe13" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Mon May 03 15:39:45 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue May 04 08:39:36 2010 +0200" }, "message": "hw_breakpoints: Fix percpu build failure\n\nFix this build error:\n\n kernel/hw_breakpoint.c:58:1: error: pasting \"__pcpu_scope_\" and \"*\" does not give a valid preprocessing token\n\nIt happens if CONFIG_DEBUG_FORCE_WEAK_PER_CPU, because we concatenate\nsometing with the name and we have the \"*\" in the name.\n\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Will Deacon \u003cwill.deacon@arm.com\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Mahesh Salgaonkar \u003cmahesh@linux.vnet.ibm.com\u003e\nCc: K. Prasad \u003cprasad@linux.vnet.ibm.com\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Jason Wessel \u003cjason.wessel@windriver.com\u003e\nLKML-Reference: \u003c20100503133942.GA5497@nowhere\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "54d47a2be5e7f928fb77b2f5a0761f6bd3c9dbff", "tree": "f31a627eea303b08da532645fce94cbb4452ec30", "parents": [ "fa9a97dec611c5356301645d576b523ce3919eba" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Tue May 04 04:54:47 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Tue May 04 05:38:16 2010 +0200" }, "message": "lockdep: No need to disable preemption in debug atomic ops\n\nNo need to disable preemption in the debug_atomic_* ops, as\nwe ensure interrupts are disabled already.\n\nSo let\u0027s use the __this_cpu_ops() rather than this_cpu_ops() that\nenclose the ops in a preempt disabled section.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\n" }, { "commit": "fa9a97dec611c5356301645d576b523ce3919eba", "tree": "4ce76bb7be82f1909258b601f1b4050dcc784e35", "parents": [ "ba697f40dbb704956a4cf67a7845b538015a01ea" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Tue May 04 04:52:48 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Tue May 04 05:38:12 2010 +0200" }, "message": "lockdep: Actually _dec_ in debug_atomic_dec\n\nFix a silly copy-paste mistake that was making debug_atomic_dec use\nthis_cpu_inc instead of this_cpu_dec.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\n" }, { "commit": "ba697f40dbb704956a4cf67a7845b538015a01ea", "tree": "9ab6f1391bd45c52145d04b588e31c2f1abe0c53", "parents": [ "0e417fe1f247bb3ac056ee04604332005c334fac" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Tue May 04 04:47:25 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Tue May 04 05:37:28 2010 +0200" }, "message": "lockdep: Provide off case for redundant_hardirqs_on increment\n\nWe forgot to provide a !CONFIG_DEBUG_LOCKDEP case for the\nredundant_hardirqs_on stat handling.\n\nManage that in the headers with a new __debug_atomic_inc() helper.\n\nFixes:\n\n\tkernel/lockdep.c:2306: error: \u0027lockdep_stats\u0027 undeclared (first use in this function)\n\tkernel/lockdep.c:2306: error: (Each undeclared identifier is reported only once\n\tkernel/lockdep.c:2306: error: for each function it appears in.)\n\nReported-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\n" }, { "commit": "048c852051d2bd5da54a4488bc1f16b0fc74c695", "tree": "c1482ae433455c1aa5f2f20c68773f79b60881c8", "parents": [ "66f41d4c5c8a5deed66fdcc84509376c9a0bf9d8" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Sat May 01 10:11:35 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat May 01 13:11:25 2010 +0200" }, "message": "perf: Fix resource leak in failure path of perf_event_open()\n\nperf_event_open() kfrees event after init failure which doesn\u0027t\nrelease all resources allocated by perf_event_alloc(). Use\nfree_event() instead.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Paul Mackerras \u003cpaulus@au1.ibm.com\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: \u003cstable@kernel.org\u003e\nLKML-Reference: \u003c4BDBE237.1040809@kernel.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "feef47d0cb530e8419dfa0b48141b538b89b1b1a", "tree": "ad40b07e8b240eca134770120b5c644ec0062ce2", "parents": [ "f93a20541134fa767e8dc4eb32e956d30b9f6b92" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Fri Apr 23 05:59:55 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Sat May 01 04:32:14 2010 +0200" }, "message": "hw-breakpoints: Get the number of available registers on boot dynamically\n\nThe breakpoint generic layer assumes that archs always know in advance\nthe static number of address registers available to host breakpoints\nthrough the HBP_NUM macro.\n\nHowever this is not true for every archs. For example Arm needs to get\nthis information dynamically to handle the compatiblity between\ndifferent versions.\n\nTo solve this, this patch proposes to drop the static HBP_NUM macro\nand let the arch provide the number of available slots through a\nnew hw_breakpoint_slots() function. For archs that have\nCONFIG_HAVE_MIXED_BREAKPOINTS_REGS selected, it will be called once\nas the number of registers fits for instruction and data breakpoints\ntogether.\nFor the others it will be called first to get the number of\ninstruction breakpoint registers and another time to get the\ndata breakpoint registers, the targeted type is given as a\nparameter of hw_breakpoint_slots().\n\nReported-by: Will Deacon \u003cwill.deacon@arm.com\u003e\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nAcked-by: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Mahesh Salgaonkar \u003cmahesh@linux.vnet.ibm.com\u003e\nCc: K. Prasad \u003cprasad@linux.vnet.ibm.com\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Jason Wessel \u003cjason.wessel@windriver.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "f93a20541134fa767e8dc4eb32e956d30b9f6b92", "tree": "da262316510683286dcaf1dbc2e4dddc5ac44ba3", "parents": [ "0102752e4c9e0655b39734550d4c35327954f7f9" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Tue Apr 13 00:32:30 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Sat May 01 04:32:12 2010 +0200" }, "message": "hw-breakpoints: Handle breakpoint weight in allocation constraints\n\nDepending on their nature and on what an arch supports, breakpoints\nmay consume more than one address register. For example a simple\nabsolute address match usually only requires one address register.\nBut an address range match may consume two registers.\n\nCurrently our slot allocation constraints, that tend to reflect the\nlimited arch\u0027s resources, always consider that a breakpoint consumes\none slot.\n\nThen provide a way for archs to tell us the weight of a breakpoint\nthrough a new hw_breakpoint_weight() helper. This weight will be\ncomputed against the generic allocation constraints instead of\na constant value.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nAcked-by: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Will Deacon \u003cwill.deacon@arm.com\u003e\nCc: Mahesh Salgaonkar \u003cmahesh@linux.vnet.ibm.com\u003e\nCc: K. Prasad \u003cprasad@linux.vnet.ibm.com\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "0102752e4c9e0655b39734550d4c35327954f7f9", "tree": "04c23f88e57c8e804d144434c60b91879e83648d", "parents": [ "b2812d031dea86926e9c10f7714af33ac2f6b43d" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Sun Apr 11 18:55:56 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Sat May 01 04:32:11 2010 +0200" }, "message": "hw-breakpoints: Separate constraint space for data and instruction breakpoints\n\nThere are two outstanding fashions for archs to implement hardware\nbreakpoints.\n\nThe first is to separate breakpoint address pattern definition\nspace between data and instruction breakpoints. We then have\ntypically distinct instruction address breakpoint registers\nand data address breakpoint registers, delivered with\nseparate control registers for data and instruction breakpoints\nas well. This is the case of PowerPc and ARM for example.\n\nThe second consists in having merged breakpoint address space\ndefinition between data and instruction breakpoint. Address\nregisters can host either instruction or data address and\nthe access mode for the breakpoint is defined in a control\nregister. This is the case of x86 and Super H.\n\nThis patch adds a new CONFIG_HAVE_MIXED_BREAKPOINTS_REGS config\nthat archs can select if they belong to the second case. Those\nwill have their slot allocation merged for instructions and\ndata breakpoints.\n\nThe others will have a separate slot tracking between data and\ninstruction breakpoints.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nAcked-by: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Will Deacon \u003cwill.deacon@arm.com\u003e\nCc: Mahesh Salgaonkar \u003cmahesh@linux.vnet.ibm.com\u003e\nCc: K. Prasad \u003cprasad@linux.vnet.ibm.com\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "b2812d031dea86926e9c10f7714af33ac2f6b43d", "tree": "a48b18b49fa064e89b7b03e057e46e5a294a8053", "parents": [ "87e9b2024659c614a876ce359a57e98a47b5ef37" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Sun Apr 18 18:11:53 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Sat May 01 04:32:10 2010 +0200" }, "message": "hw-breakpoints: Change/Enforce some breakpoints policies\n\nThe current policies of breakpoints in x86 and SH are the following:\n\n- task bound breakpoints can only break on userspace addresses\n- cpu wide breakpoints can only break on kernel addresses\n\nThe former rule prevents ptrace breakpoints to be set to trigger on\nkernel addresses, which is good. But as a side effect, we can\u0027t\nbreakpoint on kernel addresses for task bound breakpoints.\n\nThe latter rule simply makes no sense, there is no reason why we\ncan\u0027t set breakpoints on userspace while performing cpu bound\nprofiles.\n\nWe want the following new policies:\n\n- task bound breakpoint can set userspace address breakpoints, with\nno particular privilege required.\n- task bound breakpoints can set kernelspace address breakpoints but\nmust be privileged to do that.\n- cpu bound breakpoints can do what they want as they are privileged\nalready.\n\nTo implement these new policies, this patch checks if we are dealing\nwith a kernel address breakpoint, if so and if the exclude_kernel\nparameter is set, we tell the user that the breakpoint is invalid,\nwhich makes a good generic ptrace protection.\nIf we don\u0027t have exclude_kernel, ensure the user has the right\nprivileges as kernel breakpoints are quite sensitive (risk of\ntrap recursion attacks and global performance impacts).\n\n[ Paul Mundt: keep addr space check for sh signal delivery and fix\n double function declaration]\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Will Deacon \u003cwill.deacon@arm.com\u003e\nCc: Mahesh Salgaonkar \u003cmahesh@linux.vnet.ibm.com\u003e\nCc: K. Prasad \u003cprasad@linux.vnet.ibm.com\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Jason Wessel \u003cjason.wessel@windriver.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Paul Mundt \u003clethal@linux-sh.org\u003e\n" }, { "commit": "87e9b2024659c614a876ce359a57e98a47b5ef37", "tree": "5a9449e181d59e2142e5424fe68bea225597476a", "parents": [ "73266fc1df2f94cf72b3beba3eee3b88ed0b0664" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Sat Apr 17 18:11:59 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Sat May 01 04:32:09 2010 +0200" }, "message": "hw-breakpoints: Check disabled breakpoints again\n\nWe stopped checking disabled breakpoints because we weren\u0027t\nallowing breakpoints on NULL addresses. And gdb tends to set\nNULL addresses on inactive breakpoints.\n\nBut refusing NULL addresses was actually a regression that has\nbeen fixed now. There is no reason anymore to not validate\ninactive breakpoint settings.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nAcked-by: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Will Deacon \u003cwill.deacon@arm.com\u003e\nCc: Mahesh Salgaonkar \u003cmahesh@linux.vnet.ibm.com\u003e\nCc: K. Prasad \u003cprasad@linux.vnet.ibm.com\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Jason Wessel \u003cjason.wessel@windriver.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "913769f24eadcd38a936ffae41d9b4895ec02e43", "tree": "b1786f5789aa015f488a834a675c20120791bce3", "parents": [ "8795d7717c467bea7b0a0649d44a258e09f34db2" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Thu Apr 15 23:10:43 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Fri Apr 30 19:15:56 2010 +0200" }, "message": "lockdep: Simplify debug atomic ops\n\nSimplify debug_atomic_inc/dec by using this_cpu_inc/dec() instead\nof doing it through an indirect get_cpu_var() and a manual\nincrementation.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\n" }, { "commit": "8795d7717c467bea7b0a0649d44a258e09f34db2", "tree": "33d0dc56ef918bfc7dd615162be20e77899147c5", "parents": [ "868c522b1b75fd3fd3e6a636b4c344ac08edf13a" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Thu Apr 15 23:10:42 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Fri Apr 30 19:15:49 2010 +0200" }, "message": "lockdep: Fix redundant_hardirqs_on incremented with irqs enabled\n\nWhen a path restore the flags while irqs are already enabled, we\nupdate the per cpu var redundant_hardirqs_on in a racy fashion\nand debug_atomic_inc() warns about this situation.\n\nIn this particular case, loosing a few hits in a stat is not a big\ndeal, so increment it without protection.\n\nv2: Don\u0027t bother with disabling irq, we can miss one count in\n rare situations\n\nReported-by: Stephen Rothwell \u003csfr@canb.auug.org.au\u003e\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\n" }, { "commit": "868c522b1b75fd3fd3e6a636b4c344ac08edf13a", "tree": "d85b984d9818abc3ccc0237eb53b710d9e96c39e", "parents": [ "bd6d29c25bb1a24a4c160ec5de43e0004e01f72b", "66f41d4c5c8a5deed66fdcc84509376c9a0bf9d8" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Fri Apr 30 19:11:13 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Fri Apr 30 19:12:47 2010 +0200" }, "message": "Merge commit \u0027v2.6.34-rc6\u0027 into core/locking\n\nMerge reason: Further lockdep patches depend on per cpu updates\nmade in -rc1.\n" }, { "commit": "8b46f880841aac821af8efa6581bb0e46b8b9845", "tree": "4172415abf0f8cbbdd7367023cf521e7a56b9a3a", "parents": [ "8b08ca52f5942c21564bbb90ccfb61053f2c26a1" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Apr 21 13:02:08 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Apr 30 12:03:17 2010 +0200" }, "message": "rcu: Fix RCU lockdep splat on freezer_fork path\n\nAdd an RCU read-side critical section to suppress this false\npositive.\n\nLocated-by: Eric Paris \u003ceparis@parisplace.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nAcked-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: laijs@cn.fujitsu.com\nCc: dipankar@in.ibm.com\nCc: mathieu.desnoyers@polymtl.ca\nCc: josh@joshtriplett.org\nCc: dvhltc@us.ibm.com\nCc: niv@us.ibm.com\nCc: peterz@infradead.org\nCc: rostedt@goodmis.org\nCc: Valdis.Kletnieks@vt.edu\nCc: dhowells@redhat.com\nCc: eric.dumazet@gmail.com\nLKML-Reference: \u003c1271880131-3951-2-git-send-email-paulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "8b08ca52f5942c21564bbb90ccfb61053f2c26a1", "tree": "3fbba8114fdad7d077390c206ae17c38fbc85cb8", "parents": [ "4b402210486c6414fe5fbfd85934a0a22da56b04" ], "author": { "name": "Peter Zijlstra", "email": "peterz@infradead.org", "time": "Wed Apr 21 13:02:07 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Apr 30 12:03:17 2010 +0200" }, "message": "rcu: Fix RCU lockdep splat in set_task_cpu on fork path\n\nAdd an RCU read-side critical section to suppress this false\npositive.\n\nLocated-by: Eric Paris \u003ceparis@parisplace.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: laijs@cn.fujitsu.com\nCc: dipankar@in.ibm.com\nCc: mathieu.desnoyers@polymtl.ca\nCc: josh@joshtriplett.org\nCc: dvhltc@us.ibm.com\nCc: niv@us.ibm.com\nCc: peterz@infradead.org\nCc: rostedt@goodmis.org\nCc: Valdis.Kletnieks@vt.edu\nCc: dhowells@redhat.com\nCc: eric.dumazet@gmail.com\nLKML-Reference: \u003c1271880131-3951-1-git-send-email-paulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "3ca50496c2677a2b3fdd3ede86660fd1433beac6", "tree": "97a76d8479a8d8a96e04ed0694b8dbf89457bfcc", "parents": [ "462b04e28a7ec1339c892117c3f20a40e55d0e83", "66f41d4c5c8a5deed66fdcc84509376c9a0bf9d8" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Apr 30 09:56:41 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Apr 30 09:56:44 2010 +0200" }, "message": "Merge commit \u0027v2.6.34-rc6\u0027 into perf/core\n\nMerge reason: update to the latest -rc.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "47dd5be2d6a82b8153e059a1d09eb3879d485bfd", "tree": "8d67407e8c3e00d303bd59bf97ecad5d08b4dd19", "parents": [ "66f41d4c5c8a5deed66fdcc84509376c9a0bf9d8" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Fri Apr 30 07:23:51 2010 +0200" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Fri Apr 30 07:24:51 2010 +0200" }, "message": "workqueue: flush_delayed_work: keep the original workqueue for re-queueing\n\nflush_delayed_work() always uses keventd_wq for re-queueing,\nbut it should use the workqueue this dwork was queued on.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "37e44bc50d91df1fe7edcf6f02fe168c6d802e64", "tree": "40058a2b27e94400dc4345ba13b334fb732ae532", "parents": [ "e330b3bcd83199dd63a819d8d12e40f9edae6c77" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Tue Apr 27 21:04:24 2010 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Apr 27 21:04:24 2010 -0400" }, "message": "tracing: Fix sleep time function profiling\n\nWhen sleep_time is off the function profiler ignores the time that a task\nis scheduled out. When the task is scheduled out a timestamp is taken.\nWhen the task is scheduled back in, the timestamp is compared to the\ncurrent time and the saved calltimes are adjusted accordingly.\n\nBut when stopping the function profiler, the sched switch hook that\ndoes this adjustment was stopped before shutting down the tracer.\nThis allowed some tasks to not get their timestamps set when they\nscheduled out. When the function profiler started again, this would\nskew the times of the scheduler functions.\n\nThis patch moves the stopping of the sched switch to after the function\nprofiler is stopped. It also ignores zero set calltimes, which may\nhappen on start up.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "e330b3bcd83199dd63a819d8d12e40f9edae6c77", "tree": "45d488ed1f112db14ca180af5f4d2d09515a1f09", "parents": [ "07271aa42d13378e67ebd79ea9ca1c4a5e2ad46f" ], "author": { "name": "Chase Douglas", "email": "chase.douglas@canonical.com", "time": "Mon Apr 26 14:02:05 2010 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Apr 27 18:23:15 2010 -0400" }, "message": "tracing: Show sample std dev in function profiling\n\nWhen combined with function graph tracing the ftrace function profiler\nalso prints the average run time of functions. While this gives us some\ngood information, it doesn\u0027t tell us anything about the variance of the\nrun times of the function. This change prints out the s^2 sample\nstandard deviation alongside the average.\n\nThis change adds one entry to the profile record structure. This\nincreases the memory footprint of the function profiler by 1/3 on a\n32-bit system, and by 1/5 on a 64-bit system when function graphing is\nenabled, though the memory is only allocated when the profiler is turned\non. During the profiling, one extra line of code adds the squared\ncalltime to the new record entry, so this should not adversly affect\nperformance.\n\nNote that the square of the sample standard deviation is printed because\nthere is no sqrt implementation for unsigned long long in the kernel.\n\nSigned-off-by: Chase Douglas \u003cchase.douglas@canonical.com\u003e\nLKML-Reference: \u003c1272304925-2436-1-git-send-email-chase.douglas@canonical.com\u003e\n\n[ fixed comment about ns^2 -\u003e us^2 conversion ]\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "a838b2e634405fb89ddbf4fa9412acb33911911f", "tree": "987cb7b9bb5f7558b72760ba18a0979ac19212fd", "parents": [ "72c9ddfd4c5bf54ef03cfdf57026416cb678eeba" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Tue Apr 27 13:26:58 2010 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Apr 27 13:26:58 2010 -0400" }, "message": "ring-buffer: Make benchmark handle missed events\n\nWith the addition of the \"missed events\" flags that is stored in the\ncommit field of the ring buffer page, the ring_buffer_benchmark\nwas not updated to handle this. If events are missed, then the\nmissed events flag is set in the ring buffer page, the benchmark\nwill count that flag as part of the size of the page and will hit the BUG()\nwhen it tries to read beyond the page.\n\nThe solution is simply to have the ring buffer benchmark mask off\nthe extra bits.\n\nReported-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "72c9ddfd4c5bf54ef03cfdf57026416cb678eeba", "tree": "bd2c2b6b411975a8219d7138ba7699ee5d324e77", "parents": [ "62b915f1060996a8e1f69be50e3b8e9e43b710cb" ], "author": { "name": "David Miller", "email": "davem@davemloft.net", "time": "Tue Apr 20 15:47:11 2010 -0700" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Apr 27 13:06:35 2010 -0400" }, "message": "ring-buffer: Make non-consuming read less expensive with lots of cpus.\n\nWhen performing a non-consuming read, a synchronize_sched() is\nperformed once for every cpu which is actively tracing.\n\nThis is very expensive, and can make it take several seconds to open\nup the \u0027trace\u0027 file with lots of cpus.\n\nOnly one synchronize_sched() call is actually necessary. What is\ndesired is for all cpus to see the disabling state change. So we\ntransform the existing sequence:\n\n\tfor_each_cpu() {\n\t\tring_buffer_read_start();\n\t}\n\nwhere each ring_buffer_start() call performs a synchronize_sched(),\ninto the following:\n\n\tfor_each_cpu() {\n\t\tring_buffer_read_prepare();\n\t}\n\tring_buffer_read_prepare_sync();\n\tfor_each_cpu() {\n\t\tring_buffer_read_start();\n\t}\n\nwherein only the single ring_buffer_read_prepare_sync() call needs to\ndo the synchronize_sched().\n\nThe first phase, via ring_buffer_read_prepare(), allocates the \u0027iter\u0027\nmemory and increments -\u003erecord_disabled.\n\nIn the second phase, ring_buffer_read_prepare_sync() makes sure this\n-\u003erecord_disabled state is visible fully to all cpus.\n\nAnd in the final third phase, the ring_buffer_read_start() calls reset\nthe \u0027iter\u0027 objects allocated in the first phase since we now know that\nnone of the cpus are adding trace entries any more.\n\nThis makes openning the \u0027trace\u0027 file nearly instantaneous on a\nsparc64 Niagara2 box with 128 cpus tracing.\n\nSigned-off-by: David S. Miller \u003cdavem@davemloft.net\u003e\nLKML-Reference: \u003c20100420.154711.11246950.davem@davemloft.net\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "62b915f1060996a8e1f69be50e3b8e9e43b710cb", "tree": "26741f065b30b67022d680c3bc2afbda319638e1", "parents": [ "d7a8d9e907cc294ec7a4a7046d1886375fbcc82e" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Fri Apr 02 19:01:22 2010 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Apr 27 12:36:53 2010 -0400" }, "message": "tracing: Add graph output support for irqsoff tracer\n\nAdd function graph output to irqsoff tracer.\n\nThe graph output is enabled by setting new \u0027display-graph\u0027 trace option.\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLKML-Reference: \u003c1270227683-14631-4-git-send-email-jolsa@redhat.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "b8bc1389b74c2b66255651a6fcfae56c78b6e63f", "tree": "dc3d2b1d6beab0dd44ed0dda2e0aa1cc2a99be44", "parents": [ "5534ecb2dda04345e8243901e0e49599228b4273" ], "author": { "name": "Alessio Igor Bogani", "email": "abogani@texware.it", "time": "Sun Apr 25 13:18:48 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Mon Apr 26 23:42:51 2010 +0200" }, "message": "ptrace: Cleanup useless header\n\nBKL isn\u0027t present anymore into this file thus we can safely remove\nsmp_lock.h inclusion.\n\nSigned-off-by: Alessio Igor Bogani \u003cabogani@texware.it\u003e\nCc: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\n" } ], "next": "d7a8d9e907cc294ec7a4a7046d1886375fbcc82e" }