)]}'
{
  "log": [
    {
      "commit": "123f94f22e3d283dfe68742b269c245b0501ad82",
      "tree": "1d40043b0909f309cf77204ea87be9e61f143e79",
      "parents": [
        "4b78c119f0ba715b4e29b190bf4d7bce810ea0d6",
        "8c215bd3890c347dfb6a2db4779755f8b9c298a9"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Jul 02 09:52:58 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Jul 02 09:52:58 2010 -0700"
      },
      "message": "Merge branch \u0027sched-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027sched-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n  sched: Cure nr_iowait_cpu() users\n  init: Fix comment\n  init, sched: Fix race between init and kthreadd\n"
    },
    {
      "commit": "8c215bd3890c347dfb6a2db4779755f8b9c298a9",
      "tree": "e6bd5de8a028babe9ec75f744977bd1424df106c",
      "parents": [
        "9715856922bf8475f5428c29b6f4a9eebc97d391"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "peterz@infradead.org",
        "time": "Thu Jul 01 09:07:17 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Jul 01 09:39:48 2010 +0200"
      },
      "message": "sched: Cure nr_iowait_cpu() users\n\nCommit 0224cf4c5e (sched: Intoduce get_cpu_iowait_time_us())\nbroke things by not making sure preemption was indeed disabled\nby the callers of nr_iowait_cpu() which took the iowait value of\nthe current cpu.\n\nThis resulted in a heap of preempt warnings. Cure this by making\nnr_iowait_cpu() take a cpu number and fix up the callers to pass\nin the right number.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Arjan van de Ven \u003carjan@infradead.org\u003e\nCc: Sergey Senozhatsky \u003csergey.senozhatsky@gmail.com\u003e\nCc: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nCc: Maxim Levitsky \u003cmaximlevitsky@gmail.com\u003e\nCc: Len Brown \u003clen.brown@intel.com\u003e\nCc: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: Jiri Slaby \u003cjslaby@suse.cz\u003e\nCc: linux-pm@lists.linux-foundation.org\nLKML-Reference: \u003c1277968037.1868.120.camel@laptop\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "f014d937d61f47761f961eba903feb2ffa1793aa",
      "tree": "4a6a9441b21711e34d567a8066950548935b9b3a",
      "parents": [
        "cf91b415c8419513ada650a932bfb32a526d4d98",
        "0d98bb2656e9bd2dfda2d089db1fe1dbdab41504"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jun 28 12:18:30 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jun 28 12:18:30 2010 -0700"
      },
      "message": "Merge branch \u0027sched-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027sched-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n  sched: Prevent compiler from optimising the sched_avg_update() loop\n  sched: Fix over-scheduling bug\n  sched: Fix PROVE_RCU vs cpu_cgroup\n"
    },
    {
      "commit": "0d98bb2656e9bd2dfda2d089db1fe1dbdab41504",
      "tree": "2172bbdd7fb21640062b2a692ded3d9cebc2382c",
      "parents": [
        "3c93717cfa51316e4dbb471e7c0f9d243359d5f8"
      ],
      "author": {
        "name": "Will Deacon",
        "email": "will.deacon@arm.com",
        "time": "Mon May 24 12:11:43 2010 -0700"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Jun 25 16:11:50 2010 +0200"
      },
      "message": "sched: Prevent compiler from optimising the sched_avg_update() loop\n\nGCC 4.4.1 on ARM has been observed to replace the while loop in\nsched_avg_update with a call to uldivmod, resulting in the\nfollowing build failure at link-time:\n\nkernel/built-in.o: In function `sched_avg_update\u0027:\n kernel/sched.c:1261: undefined reference to `__aeabi_uldivmod\u0027\n kernel/sched.c:1261: undefined reference to `__aeabi_uldivmod\u0027\nmake: *** [.tmp_vmlinux1] Error 1\n\nThis patch introduces a fake data hazard to the loop body to\nprevent the compiler optimising the loop away.\n\nSigned-off-by: Will Deacon \u003cwill.deacon@arm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nAcked-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Catalin Marinas \u003ccatalin.marinas@arm.com\u003e\nCc: Russell King \u003crmk@arm.linux.org.uk\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "8695159967957015f8dfb49315d6f88e111d90e0",
      "tree": "d575083d37a069be585d575ec036faa8765f1d0c",
      "parents": [
        "94bfa3b6692c7a3f6f119596724204ec975d3ef0"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "peterz@infradead.org",
        "time": "Tue Jun 22 11:44:53 2010 +0200"
      },
      "committer": {
        "name": "Paul E. McKenney",
        "email": "paulmck@linux.vnet.ibm.com",
        "time": "Wed Jun 23 15:14:09 2010 -0700"
      },
      "message": "sched: silence PROVE_RCU in sched_fork()\n\nBecause cgroup_fork() is ran before sched_fork() [ from copy_process() ]\nand the child\u0027s pid is not yet visible the child is pinned to its\ncgroup. Therefore we can silence this warning.\n\nA nicer solution would be moving cgroup_fork() to right after\ndup_task_struct() and exclude PF_STARTING from task_subsys_state().\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nReviewed-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n"
    },
    {
      "commit": "3c93717cfa51316e4dbb471e7c0f9d243359d5f8",
      "tree": "0c37ea18287556b42d6264d41c7093dd07f052f5",
      "parents": [
        "dc61b1d65e353d638b2445f71fb8e5b5630f2415"
      ],
      "author": {
        "name": "Alex,Shi",
        "email": "alex.shi@intel.com",
        "time": "Thu Jun 17 14:08:13 2010 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Jun 18 10:45:25 2010 +0200"
      },
      "message": "sched: Fix over-scheduling bug\n\nCommit e70971591 (\"sched: Optimize unused cgroup configuration\") introduced\nan imbalanced scheduling bug.\n\nIf we do not use CGROUP, function update_h_load won\u0027t update h_load. When the\nsystem has a large number of tasks far more than logical CPU number, the\nincorrect cfs_rq[cpu]-\u003eh_load value will cause load_balance() to pull too\nmany tasks to the local CPU from the busiest CPU. So the busiest CPU keeps\ngoing in a round robin. That will hurt performance.\n\nThe issue was found originally by a scientific calculation workload that\ndeveloped by Yanmin. With that commit, the workload performance drops\nabout 40%.\n\n CPU  before    after\n\n 00   : 2       : 7\n 01   : 1       : 7\n 02   : 11      : 6\n 03   : 12      : 7\n 04   : 6       : 6\n 05   : 11      : 7\n 06   : 10      : 6\n 07   : 12      : 7\n 08   : 11      : 6\n 09   : 12      : 6\n 10   : 1       : 6\n 11   : 1       : 6\n 12   : 6       : 6\n 13   : 2       : 6\n 14   : 2       : 6\n 15   : 1       : 6\n\nReviewed-by: Yanmin zhang \u003cyanmin.zhang@intel.com\u003e\nSigned-off-by: Alex Shi \u003calex.shi@intel.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1276754893.9452.5442.camel@debian\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "dc61b1d65e353d638b2445f71fb8e5b5630f2415",
      "tree": "07d79b2d385a380207cd889ac764b57190421fd1",
      "parents": [
        "3975d16760d4be7402d1067c548c30c427971331"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Tue Jun 08 11:40:42 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Jun 08 18:44:04 2010 +0200"
      },
      "message": "sched: Fix PROVE_RCU vs cpu_cgroup\n\nPROVE_RCU has a few issues with the cpu_cgroup because the scheduler\ntypically holds rq-\u003elock around the css rcu derefs but the generic\ncgroup code doesn\u0027t (and can\u0027t) know about that lock.\n\nProvide means to add extra checks to the css dereference and use that\nin the scheduler to annotate its users.\n\nThe addition of rq-\u003elock to these checks is correct because the\ncgroup_subsys::attach() method takes the rq-\u003elock for each task it\nmoves, therefore by holding that lock, we ensure the task is pinned to\nthe current cgroup and the RCU derefence is valid.\n\nThat leaves one genuine race in __sched_setscheduler() where we used\ntask_group() without holding any of the required locks and thus raced\nwith the cgroup code. Solve this by moving the check under the\nappropriate lock.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@linux.vnet.ibm.com\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "e51fd5e22e12b39f49b1bb60b37b300b17378a43",
      "tree": "391500ff509dc30991db38e3d54eaccfe385d1cb",
      "parents": [
        "54e88fad223c4e1d94289611a90c7fe3ebe5631b"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Mon May 31 12:37:30 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Jun 01 09:27:16 2010 +0200"
      },
      "message": "sched: Fix wake_affine() vs RT tasks\n\nMike reports that since e9e9250b (sched: Scale down cpu_power due to RT\ntasks), wake_affine() goes funny on RT tasks due to them still having a\n!0 weight and wake_affine() still subtracts that from the rq weight.\n\nSince nobody should be using se-\u003eweight for RT tasks, set the value to\nzero. Also, since we now use -\u003ecpu_power to normalize rq weights to\naccount for RT cpu usage, add that factor into the imbalance computation.\n\nReported-by: Mike Galbraith \u003cefault@gmx.de\u003e\nTested-by: Mike Galbraith \u003cefault@gmx.de\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1275316109.27810.22969.camel@twins\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "b612a0553714c6b9744ad0d03f10cac78f3a84b1",
      "tree": "9dfb5cb5d13c187ff1f54448f8441512203625d0",
      "parents": [
        "52b0ace7dfe8f70350218017a95d7cab1eb41fbb",
        "2a8e5e3637e2fc058798f5d3626f525729ffaaaf"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun May 30 08:56:39 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun May 30 08:56:39 2010 -0700"
      },
      "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:\n  ceph: clean up on forwarded aborted mds request\n  ceph: fix leak of osd authorizer\n  ceph: close out mds, osd connections before stopping auth\n  ceph: make lease code DN specific\n  fs/ceph: Use ERR_CAST\n  ceph: renew auth tickets before they expire\n  ceph: do not resend mon requests on auth ticket renewal\n  ceph: removed duplicated #includes\n  ceph: avoid possible null dereference\n  ceph: make mds requests killable, not interruptible\n  sched: add wait_for_completion_killable_timeout\n"
    },
    {
      "commit": "0aa12fb439838a85802ab8b7fbb9bcfc3e6e05cb",
      "tree": "c944cf9abba9a6afb3d1259140c73101d0e222a0",
      "parents": [
        "240ed68eb567d80dd6bab739341999a5ab0ad55d"
      ],
      "author": {
        "name": "Sage Weil",
        "email": "sage@newdream.net",
        "time": "Sat May 29 09:12:30 2010 -0700"
      },
      "committer": {
        "name": "Sage Weil",
        "email": "sage@newdream.net",
        "time": "Sat May 29 09:12:30 2010 -0700"
      },
      "message": "sched: add wait_for_completion_killable_timeout\n\nAdd missing _killable_timeout variant for wait_for_completion that will\nreturn when a timeout expires or the task is killed.\n\nCC: Ingo Molnar \u003cmingo@elte.hu\u003e\nCC: Andreas Herrmann \u003candreas.herrmann3@amd.com\u003e\nCC: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCC: Mike Galbraith \u003cefault@gmx.de\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Sage Weil \u003csage@newdream.net\u003e\n"
    },
    {
      "commit": "b7b8ff6373d4b910af081f76888395e6df53249d",
      "tree": "128a1b2cf026fb8b9791eaefb6f79f872999a5c6",
      "parents": [
        "4ada856fb0ee62f6fe3aac3de726deac0640d929"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:18 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:46 2010 -0700"
      },
      "message": "signals: kill the awful task_rq_unlock_wait() hack\n\nNow that task-\u003esignal can\u0027t go away we can revert the horrible hack added\nby ad474caca3e2a0550b7ce0706527ad5ab389a4d4 (\"fix for\naccount_group_exec_runtime(), make sure -\u003esignal can\u0027t be freed under\nrq-\u003elock\").\n\nAnd we can do more cleanups sched_stats.h/posix-cpu-timers.c later.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Alan Cox \u003calan@linux.intel.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "90b9a32d8f441369b2f97a765d2d957b531eb653",
      "tree": "3146d251a983ba12226e75c121613de6f051af8b",
      "parents": [
        "8b108c609adefd98577c35f0a41497a610041a6c",
        "4402c153cb9c549cd21d6007ef0dfac50c8d148d"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri May 21 11:08:05 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri May 21 11:08:05 2010 -0700"
      },
      "message": "Merge branch \u0027kdb-merge\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb\n\n* \u0027kdb-merge\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb: (25 commits)\n  kdb,debug_core: Allow the debug core to receive a panic notification\n  MAINTAINERS: update kgdb, kdb, and debug_core info\n  debug_core,kdb: Allow the debug core to process a recursive debug entry\n  printk,kdb: capture printk() when in kdb shell\n  kgdboc,kdb: Allow kdb to work on a non open console port\n  kgdb: Add the ability to schedule a breakpoint via a tasklet\n  mips,kgdb: kdb low level trap catch and stack trace\n  powerpc,kgdb: Introduce low level trap catching\n  x86,kgdb: Add low level debug hook\n  kgdb: remove post_primary_code references\n  kgdb,docs: Update the kgdb docs to include kdb\n  kgdboc,keyboard: Keyboard driver for kdb with kgdb\n  kgdb: gdb \"monitor\" -\u003e kdb passthrough\n  sparc,sunzilog: Add console polling support for sunzilog serial driver\n  sh,sh-sci: Use NO_POLL_CHAR in the SCIF polled console code\n  kgdb,8250,pl011: Return immediately from console poll\n  kgdb: core changes to support kdb\n  kdb: core for kgdb back end (2 of 2)\n  kdb: core for kgdb back end (1 of 2)\n  kgdb,blackfin: Add in kgdb_arch_set_pc for blackfin\n  ...\n"
    },
    {
      "commit": "7a9b149212f3716c598afe973b6261fd58453b7a",
      "tree": "477716d84c71da124448b72278e98da28aadbd3d",
      "parents": [
        "3d62e3fdce8ef265a3706c52ae1ca6ab84e30f0e",
        "e26bcf37234c67624f62d9fc95f922b8dbda1363"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 20 21:26:12 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 20 21:26:12 2010 -0700"
      },
      "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (229 commits)\n  USB: remove unused usb_buffer_alloc and usb_buffer_free macros\n  usb: musb: update gfp/slab.h includes\n  USB: ftdi_sio: fix legacy SIO-device header\n  USB: kl5usb105: reimplement using generic framework\n  USB: kl5usb105: minor clean ups\n  USB: kl5usb105: fix memory leak\n  USB: io_ti: use kfifo to implement write buffering\n  USB: io_ti: remove unsused private counter\n  USB: ti_usb: use kfifo to implement write buffering\n  USB: ir-usb: fix incorrect write-buffer length\n  USB: aircable: fix incorrect write-buffer length\n  USB: safe_serial: straighten out read processing\n  USB: safe_serial: reimplement read using generic framework\n  USB: safe_serial: reimplement write using generic framework\n  usb-storage: always print quirks\n  USB: usb-storage: trivial debug improvements\n  USB: oti6858: use port write fifo\n  USB: oti6858: use kfifo to implement write buffering\n  USB: cypress_m8: use kfifo to implement write buffering\n  USB: cypress_m8: remove unused drain define\n  ...\n\nFix up conflicts (due to usb_buffer_alloc/free renaming) in\n\tdrivers/input/tablet/acecad.c\n\tdrivers/input/tablet/kbtab.c\n\tdrivers/input/tablet/wacom_sys.c\n\tdrivers/media/video/gspca/gspca.c\n\tsound/usb/usbaudio.c\n"
    },
    {
      "commit": "67fc4e0cb931d6b4ccf21248e4199b154478ecea",
      "tree": "4cf49d00bc9ac03c3c77d91fadd13fcabc75e0c9",
      "parents": [
        "5d5314d6795f3c1c0f415348ff8c51f7de042b77"
      ],
      "author": {
        "name": "Jason Wessel",
        "email": "jason.wessel@windriver.com",
        "time": "Thu May 20 21:04:21 2010 -0500"
      },
      "committer": {
        "name": "Jason Wessel",
        "email": "jason.wessel@windriver.com",
        "time": "Thu May 20 21:04:21 2010 -0500"
      },
      "message": "kdb: core for kgdb back end (2 of 2)\n\nThis patch contains the hooks and instrumentation into kernel which\nlive outside the kernel/debug directory, which the kdb core\nwill call to run commands like lsmod, dmesg, bt etc...\n\nCC: linux-arch@vger.kernel.org\nSigned-off-by: Jason Wessel \u003cjason.wessel@windriver.com\u003e\nSigned-off-by: Martin Hicks \u003cmort@sgi.com\u003e\n"
    },
    {
      "commit": "22c43c81a51e05f61e90445ceb59d486c12fd921",
      "tree": "88582f01bf413bdc4d9d95a512116c9fe44afa33",
      "parents": [
        "24337c133ff92ba8d7c42819db17f7f2b0de3129"
      ],
      "author": {
        "name": "Michal Nazarewicz",
        "email": "m.nazarewicz@samsung.com",
        "time": "Wed May 05 12:53:11 2010 +0200"
      },
      "committer": {
        "name": "Greg Kroah-Hartman",
        "email": "gregkh@suse.de",
        "time": "Thu May 20 13:21:42 2010 -0700"
      },
      "message": "wait_event_interruptible_locked() interface\n\nNew wait_event_interruptible{,_exclusive}_locked{,_irq} macros added.\nThey work just like versions without _locked* suffix but require the\nwait queue\u0027s lock to be held.  Also __wake_up_locked() is now exported\nas to pair it with the above macros.\n\nThe use case of this new facility is when one uses wait queue\u0027s lock\nto  protect a data structure.  This may be advantageous if the\nstructure needs to be protected by a spinlock anyway.  In particular,\nwith additional spinlock the following code has to be used to wait\nfor a condition:\n\nspin_lock(\u0026data.lock);\n...\nfor (ret \u003d 0; !ret \u0026\u0026 !(condition); ) {\n\tspin_unlock(\u0026data.lock);\n\tret \u003d wait_event_interruptible(data.wqh, (condition));\n\tspin_lock(\u0026data.lock);\n}\n...\nspin_unlock(\u0026data.lock);\n\nThis looks bizarre plus wait_event_interruptible() locks the wait\nqueue\u0027s lock anyway so there is a unlock+lock sequence where it could\nbe avoided.\n\nTo avoid those problems and benefit from wait queue\u0027s lock, a code\nsimilar to the following should be used:\n\n/* Waiting */\nspin_lock(\u0026data.wqh.lock);\n...\nret \u003d wait_event_interruptible_locked(data.wqh, (condition));\n...\nspin_unlock(\u0026data.wqh.lock);\n\n/* Waiting exclusively */\nspin_lock(\u0026data.whq.lock);\n...\nret \u003d wait_event_interruptible_exclusive_locked(data.whq, (condition));\n...\nspin_unlock(\u0026data.whq.lock);\n\n/* Waking up */\nspin_lock(\u0026data.wqh.lock);\n...\nwake_up_locked(\u0026data.wqh);\n...\nspin_unlock(\u0026data.wqh.lock);\n\nWhen spin_lock_irq() is used matching versions of macros need to be\nused (*_locked_irq()).\n\nSigned-off-by: Michal Nazarewicz \u003cm.nazarewicz@samsung.com\u003e\nCc: Kyungmin Park \u003ckyungmin.park@samsung.com\u003e\nCc: Marek Szyprowski \u003cm.szyprowski@samsung.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Takashi Iwai \u003ctiwai@suse.de\u003e\nCc: David Howells \u003cdhowells@redhat.com\u003e\nCc: Andreas Herrmann \u003candreas.herrmann3@amd.com\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Mike Galbraith \u003cefault@gmx.de\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\n\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": "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": "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": "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": "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": "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": "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": "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": "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": "70bce3ba77540ebe77b8c0e1ac38d281a23fbb5e",
      "tree": "34b09a49228f0949ff49dce66a433b0dfd83a2dc",
      "parents": [
        "6eca8cc35b50af1037bc919106dd6dd332c959c2",
        "d5a30458a90597915977f06e79406b664a41b8ac"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 23 11:10:28 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 23 11:10:30 2010 +0200"
      },
      "message": "Merge branch \u0027linus\u0027 into perf/core\n\nMerge reason: merge the latest fixes, update to latest -rc.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "669c55e9f99b90e46eaa0f98a67ec53d46dc969a",
      "tree": "9f60bcf779e5ec786c05b8053b59e091edcb418c",
      "parents": [
        "74f5187ac873042f502227701ed1727e7c5fbfa9"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Fri Apr 16 14:59:29 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 23 11:02:02 2010 +0200"
      },
      "message": "sched: Pre-compute cpumask_weight(sched_domain_span(sd))\n\nDave reported that his large SPARC machines spend lots of time in\nhweight64(), try and optimize some of those needless cpumask_weight()\ninvocations (esp. with the large offstack cpumasks these are very\nexpensive indeed).\n\nReported-by: David Miller \u003cdavem@davemloft.net\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": "74f5187ac873042f502227701ed1727e7c5fbfa9",
      "tree": "b200960d04b0a955aaf9a101d6f0a4ed34f07bb2",
      "parents": [
        "09a40af5240de02d848247ab82440ad75b31ab11"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Thu Apr 22 21:50:19 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 23 11:02:02 2010 +0200"
      },
      "message": "sched: Cure load average vs NO_HZ woes\n\nChase reported that due to us decrementing calc_load_task prematurely\n(before the next LOAD_FREQ sample), the load average could be scewed\nby as much as the number of CPUs in the machine.\n\nThis patch, based on Chase\u0027s patch, cures the problem by keeping the\ndelta of the CPU going into NO_HZ idle separately and folding that in\non the next LOAD_FREQ update.\n\nThis restores the balance and we get strict LOAD_FREQ period samples.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nAcked-by: Chase Douglas \u003cchase.douglas@canonical.com\u003e\nLKML-Reference: \u003c1271934490.1776.343.camel@laptop\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "4b402210486c6414fe5fbfd85934a0a22da56b04",
      "tree": "23e7052c710e0443ccd895a1000b2bdd7723ab51",
      "parents": [
        "d5a30458a90597915977f06e79406b664a41b8ac"
      ],
      "author": {
        "name": "Benjamin Herrenschmidt",
        "email": "benh@kernel.crashing.org",
        "time": "Fri Apr 16 23:20:00 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 23 11:00:28 2010 +0200"
      },
      "message": "mutex: Don\u0027t spin when the owner CPU is offline or other weird cases\n\nDue to recent load-balancer changes that delay the task migration to\nthe next wakeup, the adaptive mutex spinning ends up in a live lock\nwhen the owner\u0027s CPU gets offlined because the cpu_online() check\nlives before the owner running check.\n\nThis patch changes mutex_spin_on_owner() to return 0 (don\u0027t spin) in\nany case where we aren\u0027t sure about the owner struct validity or CPU\nnumber, and if the said CPU is offline. There is no point going back \u0026\nre-evaluate spinning in corner cases like that, let\u0027s just go to\nsleep.\n\nSigned-off-by: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1271212509.13059.135.camel@pasglop\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "09a40af5240de02d848247ab82440ad75b31ab11",
      "tree": "1f0fa5e5c391d8fbf76587f687d131f9b7ae4609",
      "parents": [
        "b257c14ceb1194a6181144210056d38f22127189"
      ],
      "author": {
        "name": "Mike Galbraith",
        "email": "efault@gmx.de",
        "time": "Thu Apr 15 07:29:59 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Apr 15 09:36:47 2010 +0200"
      },
      "message": "sched: Fix UP update_avg() build warning\n\nupdate_avg() is only used for SMP builds, move it to the nearest\nSMP block.\n\nReported-by: Stephen Rothwell \u003csfr@canb.auug.org.au\u003e\nSigned-off-by: Mike Galbraith \u003cefault@gmx.de\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nLKML-Reference: \u003c1271309399.14779.17.camel@marge.simson.net\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "b257c14ceb1194a6181144210056d38f22127189",
      "tree": "c803925f1d5bf2237e7495d306bf43929df0c952",
      "parents": [
        "371fd7e7a56a5c136d31aa980011bd2f131c3ef5",
        "2ba3abd8186f24c7fb418927025b4e2120e3a362"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Apr 15 09:35:24 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Apr 15 09:36:16 2010 +0200"
      },
      "message": "Merge branch \u0027linus\u0027 into sched/core\n\nMerge reason: merge the latest fixes, update to -rc4.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "2aedd192f799c362ccefc3c316f0c4bd5154126b",
      "tree": "080ead7bd2c4ae496ef82e9633eadc1d1af28946",
      "parents": [
        "cf90bfe2ebaf9d32f37acbebb7425c280fd6cd30",
        "84fba5ec91f11c0efb27d0ed6098f7447491f0df"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Apr 08 08:37:05 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Apr 08 08:37:05 2010 -0700"
      },
      "message": "Merge branch \u0027sched-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027sched-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n  sched: Fix sched_getaffinity()\n"
    },
    {
      "commit": "ca7e0c612005937a4a5a75d3fed90459993de65c",
      "tree": "b574fc0f0189b52ffc87ba20c418228db556faa1",
      "parents": [
        "8141d0050d76e5695011b5ab577ec66fb51a998c",
        "f5284e7635787224dda1a2bf82a4c56b1c75671f"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Apr 08 13:36:36 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Apr 08 13:37:18 2010 +0200"
      },
      "message": "Merge branch \u0027linus\u0027 into perf/core\n\nSemantic conflict: arch/x86/kernel/cpu/perf_event_intel_ds.c\n\nMerge reason: pick up latest fixes, fix the conflict\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "84fba5ec91f11c0efb27d0ed6098f7447491f0df",
      "tree": "ca48cd8f7baddf29c2bcfc3cc0c7853298449f7b",
      "parents": [
        "db217dece3003df0841bacf9556b5c06aa097dae"
      ],
      "author": {
        "name": "Anton Blanchard",
        "email": "anton@samba.org",
        "time": "Tue Apr 06 17:02:19 2010 +1000"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Apr 06 10:01:35 2010 +0200"
      },
      "message": "sched: Fix sched_getaffinity()\n\ntaskset on 2.6.34-rc3 fails on one of my ppc64 test boxes with\nthe following error:\n\n  sched_getaffinity(0, 16, 0x10029650030) \u003d -1 EINVAL (Invalid argument)\n\nThis box has 128 threads and 16 bytes is enough to cover it.\n\nCommit cd3d8031eb4311e516329aee03c79a08333141f1 (sched:\nsched_getaffinity(): Allow less than NR_CPUS length) is\ncomparing this 16 bytes agains nr_cpu_ids.\n\nFix it by comparing nr_cpu_ids to the number of bits in the\ncpumask we pass in.\n\nSigned-off-by: Anton Blanchard \u003canton@samba.org\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Sharyathi Nagesh \u003csharyath@in.ibm.com\u003e\nCc: Ulrich Drepper \u003cdrepper@redhat.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Jack Steiner \u003csteiner@sgi.com\u003e\nCc: Russ Anderson \u003crja@sgi.com\u003e\nCc: Mike Travis \u003ctravis@sgi.com\u003e\nLKML-Reference: \u003c20100406070218.GM5594@kryten\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "336f5899d287f06d8329e208fc14ce50f7ec9698",
      "tree": "9b762d450d5eb248a6ff8317badb7e223d93ed58",
      "parents": [
        "a4ab2773205e8b94c18625455f85e3b6bb9d7ad6",
        "db217dece3003df0841bacf9556b5c06aa097dae"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Mon Apr 05 11:37:28 2010 +0900"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Mon Apr 05 11:37:28 2010 +0900"
      },
      "message": "Merge branch \u0027master\u0027 into export-slabh\n"
    },
    {
      "commit": "371fd7e7a56a5c136d31aa980011bd2f131c3ef5",
      "tree": "cf52014018e8258acd8bcfd486d855f098a02c03",
      "parents": [
        "cc87f76a601d2d256118f7bab15e35254356ae21"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Wed Mar 24 16:38:48 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 02 20:12:05 2010 +0200"
      },
      "message": "sched: Add enqueue/dequeue flags\n\nIn order to reduce the dependency on TASK_WAKING rework the enqueue\ninterface to support a proper flags field.\n\nReplace the int wakeup, bool head arguments with an int flags argument\nand create the following flags:\n\n  ENQUEUE_WAKEUP - the enqueue is a wakeup of a sleeping task,\n  ENQUEUE_WAKING - the enqueue has relative vruntime due to\n                   having sched_class::task_waking() called,\n  ENQUEUE_HEAD - the waking task should be places on the head\n                 of the priority queue (where appropriate).\n\nFor symmetry also convert sched_class::dequeue() to a flags scheme.\n\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": "cc87f76a601d2d256118f7bab15e35254356ae21",
      "tree": "1fea5a4ad226e030cdeb14c82f12dc8e766be8b2",
      "parents": [
        "65cc8e4859ff29a9ddc989c88557d6059834c2a2"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Fri Mar 26 12:22:14 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 02 20:12:04 2010 +0200"
      },
      "message": "sched: Fix nr_uninterruptible count\n\nThe cpuload calculation in calc_load_account_active() assumes\nrq-\u003enr_uninterruptible will not change on an offline cpu after\nmigrate_nr_uninterruptible(). However the recent migrate on wakeup\nchanges broke that and would result in decrementing the offline cpu\u0027s\nrq-\u003enr_uninterruptible.\n\nFix this by accounting the nr_uninterruptible on the waking cpu.\n\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": "65cc8e4859ff29a9ddc989c88557d6059834c2a2",
      "tree": "7f12c2532a92d607b5c52fa71c1799631a7a91ff",
      "parents": [
        "0017d735092844118bef006696a750a0e4ef6ebd"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Thu Mar 25 21:05:16 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 02 20:12:04 2010 +0200"
      },
      "message": "sched: Optimize task_rq_lock()\n\nNow that we hold the rq-\u003elock over set_task_cpu() again, we can do\naway with most of the TASK_WAKING checks and reduce them again to\nset_cpus_allowed_ptr().\n\nRemoves some conditionals from scheduling hot-paths.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "0017d735092844118bef006696a750a0e4ef6ebd",
      "tree": "8ed1540aaeb63da726f93da12950a8eaa0e0a3e0",
      "parents": [
        "9084bb8246ea935b98320554229e2f371f7f52fa"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Wed Mar 24 18:34:10 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 02 20:12:03 2010 +0200"
      },
      "message": "sched: Fix TASK_WAKING vs fork deadlock\n\nOleg noticed a few races with the TASK_WAKING usage on fork.\n\n - since TASK_WAKING is basically a spinlock, it should be IRQ safe\n - since we set TASK_WAKING (*) without holding rq-\u003elock it could\n   be there still is a rq-\u003elock holder, thereby not actually\n   providing full serialization.\n\n(*) in fact we clear PF_STARTING, which in effect enables TASK_WAKING.\n\nCure the second issue by not setting TASK_WAKING in sched_fork(), but\nonly temporarily in wake_up_new_task() while calling select_task_rq().\n\nCure the first by holding rq-\u003elock around the select_task_rq() call,\nthis will disable IRQs, this however requires that we push down the\nrq-\u003elock release into select_task_rq_fair()\u0027s cgroup stuff.\n\nBecause select_task_rq_fair() still needs to drop the rq-\u003elock we\ncannot fully get rid of TASK_WAKING.\n\nReported-by: Oleg Nesterov \u003coleg@redhat.com\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": "9084bb8246ea935b98320554229e2f371f7f52fa",
      "tree": "8478d18125e3b4a7e0a31d702647dee1830d23ef",
      "parents": [
        "6a1bdc1b577ebcb65f6603c57f8347309bc4ab13"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Mon Mar 15 10:10:27 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 02 20:12:03 2010 +0200"
      },
      "message": "sched: Make select_fallback_rq() cpuset friendly\n\nIntroduce cpuset_cpus_allowed_fallback() helper to fix the cpuset problems\nwith select_fallback_rq(). It can be called from any context and can\u0027t use\nany cpuset locks including task_lock(). It is called when the task doesn\u0027t\nhave online cpus in -\u003ecpus_allowed but ttwu/etc must be able to find a\nsuitable cpu.\n\nI am not proud of this patch. Everything which needs such a fat comment\ncan\u0027t be good even if correct. But I\u0027d prefer to not change the locking\nrules in the code I hardly understand, and in any case I believe this\nsimple change make the code much more correct compared to deadlocks we\ncurrently have.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c20100315091027.GA9155@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "6a1bdc1b577ebcb65f6603c57f8347309bc4ab13",
      "tree": "516130eedf782dd14505bd111e06bcfad9923b07",
      "parents": [
        "30da688ef6b76e01969b00608202fff1eed2accc"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Mon Mar 15 10:10:23 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 02 20:12:03 2010 +0200"
      },
      "message": "sched: _cpu_down(): Don\u0027t play with current-\u003ecpus_allowed\n\n_cpu_down() changes the current task\u0027s affinity and then recovers it at\nthe end. The problems are well known: we can\u0027t restore old_allowed if it\nwas bound to the now-dead-cpu, and we can race with the userspace which\ncan change cpu-affinity during unplug.\n\n_cpu_down() should not play with current-\u003ecpus_allowed at all. Instead,\ntake_cpu_down() can migrate the caller of _cpu_down() after __cpu_disable()\nremoves the dying cpu from cpu_online_mask.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c20100315091023.GA9148@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "30da688ef6b76e01969b00608202fff1eed2accc",
      "tree": "f4068cb8cf29f1d93d8489b162f41b7ac15a3d0c",
      "parents": [
        "c1804d547dc098363443667609c272d1e4d15ee8"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Mon Mar 15 10:10:19 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 02 20:12:02 2010 +0200"
      },
      "message": "sched: sched_exec(): Remove the select_fallback_rq() logic\n\nsched_exec()-\u003eselect_task_rq() reads/updates -\u003ecpus_allowed lockless.\nThis can race with other CPUs updating our -\u003ecpus_allowed, and this\nlooks meaningless to me.\n\nThe task is current and running, it must have online cpus in -\u003ecpus_allowed,\nthe fallback mode is bogus. And, if -\u003esched_class returns the \"wrong\" cpu,\nthis likely means we raced with set_cpus_allowed() which was called\nfor reason, why should sched_exec() retry and call -\u003eselect_task_rq()\nagain?\n\nChange the code to call sched_class-\u003eselect_task_rq() directly and do\nnothing if the returned cpu is wrong after re-checking under rq-\u003elock.\n\nFrom now task_struct-\u003ecpus_allowed is always stable under TASK_WAKING,\nselect_fallback_rq() is always called under rq-lock or the caller or\nthe caller owns TASK_WAKING (select_task_rq).\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c20100315091019.GA9141@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "c1804d547dc098363443667609c272d1e4d15ee8",
      "tree": "c05ecb82cfb14b550c8d2242f5b0d4ad7e87bc52",
      "parents": [
        "1445c08d06c5594895b4fae952ef8a457e89c390"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Mon Mar 15 10:10:14 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 02 20:12:02 2010 +0200"
      },
      "message": "sched: move_task_off_dead_cpu(): Remove retry logic\n\nThe previous patch preserved the retry logic, but it looks unneeded.\n\n__migrate_task() can only fail if we raced with migration after we dropped\nthe lock, but in this case the caller of set_cpus_allowed/etc must initiate\nmigration itself if -\u003eon_rq \u003d\u003d T.\n\nWe already fixed p-\u003ecpus_allowed, the changes in active/online masks must\nbe visible to racer, it should migrate the task to online cpu correctly.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c20100315091014.GA9138@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "1445c08d06c5594895b4fae952ef8a457e89c390",
      "tree": "e6fe92454d978ec8b7b84511661c7c5965307bf8",
      "parents": [
        "897f0b3c3ff40b443c84e271bef19bd6ae885195"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Mon Mar 15 10:10:10 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 02 20:12:01 2010 +0200"
      },
      "message": "sched: move_task_off_dead_cpu(): Take rq-\u003elock around select_fallback_rq()\n\nmove_task_off_dead_cpu()-\u003eselect_fallback_rq() reads/updates -\u003ecpus_allowed\nlockless. We can race with set_cpus_allowed() running in parallel.\n\nChange it to take rq-\u003elock around select_fallback_rq(). Note that it is not\ntrivial to move this spin_lock() into select_fallback_rq(), we must recheck\nthe task was not migrated after we take the lock and other callers do not\nneed this lock.\n\nTo avoid the races with other callers of select_fallback_rq() which rely on\nTASK_WAKING, we also check p-\u003estate !\u003d TASK_WAKING and do nothing otherwise.\nThe owner of TASK_WAKING must update -\u003ecpus_allowed and choose the correct\nCPU anyway, and the subsequent __migrate_task() is just meaningless because\np-\u003ese.on_rq must be false.\n\nAlternatively, we could change select_task_rq() to take rq-\u003elock right\nafter it calls sched_class-\u003eselect_task_rq(), but this looks a bit ugly.\n\nAlso, change it to not assume irqs are disabled and absorb __migrate_task_irq().\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c20100315091010.GA9131@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "897f0b3c3ff40b443c84e271bef19bd6ae885195",
      "tree": "6b969149bb59591a1c9485de405639db6c4208d6",
      "parents": [
        "25c2d55c00c6097e6792ebf21e31342f23b9b768"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Mon Mar 15 10:10:03 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 02 20:12:01 2010 +0200"
      },
      "message": "sched: Kill the broken and deadlockable cpuset_lock/cpuset_cpus_allowed_locked code\n\nThis patch just states the fact the cpusets/cpuhotplug interaction is\nbroken and removes the deadlockable code which only pretends to work.\n\n- cpuset_lock() doesn\u0027t really work. It is needed for\n  cpuset_cpus_allowed_locked() but we can\u0027t take this lock in\n  try_to_wake_up()-\u003eselect_fallback_rq() path.\n\n- cpuset_lock() is deadlockable. Suppose that a task T bound to CPU takes\n  callback_mutex. If cpu_down(CPU) happens before T drops callback_mutex\n  stop_machine() preempts T, then migration_call(CPU_DEAD) tries to take\n  cpuset_lock() and hangs forever because CPU is already dead and thus\n  T can\u0027t be scheduled.\n\n- cpuset_cpus_allowed_locked() is deadlockable too. It takes task_lock()\n  which is not irq-safe, but try_to_wake_up() can be called from irq.\n\nKill them, and change select_fallback_rq() to use cpu_possible_mask, like\nwe currently do without CONFIG_CPUSETS.\n\nAlso, with or without this patch, with or without CONFIG_CPUSETS, the\ncallers of select_fallback_rq() can race with each other or with\nset_cpus_allowed() pathes.\n\nThe subsequent patches try to to fix these problems.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c20100315091003.GA9123@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "47a70985e5c093ae03d8ccf633c70a93761d86f2",
      "tree": "cabda69d97cd880d9b3de382d41b6b7736575a8f",
      "parents": [
        "269484a492d9177072ee11ec8c9bff71d256837a"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Tue Mar 30 18:58:29 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 02 20:11:05 2010 +0200"
      },
      "message": "sched: set_cpus_allowed_ptr(): Don\u0027t use rq-\u003emigration_thread after unlock\n\nTrivial typo fix. rq-\u003emigration_thread can be NULL after\ntask_rq_unlock(), this is why we have \"mt\" which should be\n used instead.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c20100330165829.GA18284@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "c9494727cf293ae2ec66af57547a3e79c724fec2",
      "tree": "44ae197b64fa7530ee695a90ad31326dda06f1e1",
      "parents": [
        "6427462bfa50f50dc6c088c07037264fcc73eca1",
        "42be79e37e264557f12860fa4cc84b4de3685954"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 02 20:02:55 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 02 20:03:08 2010 +0200"
      },
      "message": "Merge branch \u0027linus\u0027 into sched/core\n\nMerge reason: update to latest upstream\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "ec5e61aabeac58670691bd0613388d16697d0d81",
      "tree": "59838509358f27334874b90756505785cde29b02",
      "parents": [
        "75ec5a245c7763c397f31ec8964d0a46c54a7386",
        "8bb39f9aa068262732fe44b965d7a6eb5a5a7d67"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 02 19:37:50 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 02 19:38:10 2010 +0200"
      },
      "message": "Merge branch \u0027perf/urgent\u0027 into perf/core\n\nConflicts:\n\tarch/x86/kernel/cpu/perf_event.c\n\nMerge reason: Resolve the conflict, pick up fixes\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "5a0e3ad6af8660be21ca98a971cd00f331318c05",
      "tree": "5bfb7be11a03176a87296a43ac6647975c00a1d1",
      "parents": [
        "ed391f4ebf8f701d3566423ce8f17e614cde9806"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Wed Mar 24 17:04:11 2010 +0900"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Mar 30 22:02:32 2010 +0900"
      },
      "message": "include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h\n\npercpu.h is included by sched.h and module.h and thus ends up being\nincluded when building most .c files.  percpu.h includes slab.h which\nin turn includes gfp.h making everything defined by the two files\nuniversally available and complicating inclusion dependencies.\n\npercpu.h -\u003e slab.h dependency is about to be removed.  Prepare for\nthis change by updating users of gfp and slab facilities include those\nheaders directly instead of assuming availability.  As this conversion\nneeds to touch large number of source files, the following script is\nused as the basis of conversion.\n\n  http://userweb.kernel.org/~tj/misc/slabh-sweep.py\n\nThe script does the followings.\n\n* Scan files for gfp and slab usages and update includes such that\n  only the necessary includes are there.  ie. if only gfp is used,\n  gfp.h, if slab is used, slab.h.\n\n* When the script inserts a new include, it looks at the include\n  blocks and try to put the new include such that its order conforms\n  to its surrounding.  It\u0027s put in the include block which contains\n  core kernel includes, in the same order that the rest are ordered -\n  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there\n  doesn\u0027t seem to be any matching order.\n\n* If the script can\u0027t find a place to put a new include (mostly\n  because the file doesn\u0027t have fitting include block), it prints out\n  an error message indicating which .h file needs to be added to the\n  file.\n\nThe conversion was done in the following steps.\n\n1. The initial automatic conversion of all .c files updated slightly\n   over 4000 files, deleting around 700 includes and adding ~480 gfp.h\n   and ~3000 slab.h inclusions.  The script emitted errors for ~400\n   files.\n\n2. Each error was manually checked.  Some didn\u0027t need the inclusion,\n   some needed manual addition while adding it to implementation .h or\n   embedding .c file was more appropriate for others.  This step added\n   inclusions to around 150 files.\n\n3. The script was run again and the output was compared to the edits\n   from #2 to make sure no file was left behind.\n\n4. Several build tests were done and a couple of problems were fixed.\n   e.g. lib/decompress_*.c used malloc/free() wrappers around slab\n   APIs requiring slab.h to be added manually.\n\n5. The script was run on all .h files but without automatically\n   editing them as sprinkling gfp.h and slab.h inclusions around .h\n   files could easily lead to inclusion dependency hell.  Most gfp.h\n   inclusion directives were ignored as stuff from gfp.h was usually\n   wildly available and often used in preprocessor macros.  Each\n   slab.h inclusion directive was examined and added manually as\n   necessary.\n\n6. percpu.h was updated not to include slab.h.\n\n7. Build test were done on the following configurations and failures\n   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my\n   distributed build env didn\u0027t work with gcov compiles) and a few\n   more options had to be turned off depending on archs to make things\n   build (like ipr on powerpc/64 which failed due to missing writeq).\n\n   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.\n   * powerpc and powerpc64 SMP allmodconfig\n   * sparc and sparc64 SMP allmodconfig\n   * ia64 SMP allmodconfig\n   * s390 SMP allmodconfig\n   * alpha SMP allmodconfig\n   * um on x86_64 SMP allmodconfig\n\n8. percpu.h modifications were reverted so that it could be applied as\n   a separate patch and serve as bisection point.\n\nGiven the fact that I had only a couple of failures from tests on step\n6, I\u0027m fairly confident about the coverage of this conversion patch.\nIf there is a breakage, it\u0027s likely to be something in one of the arch\nheaders which should be easily discoverable easily on most builds of\nthe specific arch.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nGuess-its-ok-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: Lee Schermerhorn \u003cLee.Schermerhorn@hp.com\u003e\n"
    },
    {
      "commit": "faa4602e47690fb11221e00f9b9697c8dc0d4b19",
      "tree": "af667d1cdff7dc63b6893ee3f27a1f2503229ed1",
      "parents": [
        "7c5ecaf7666617889f337296c610815b519abfa9"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Thu Mar 25 14:51:50 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Mar 26 11:33:55 2010 +0100"
      },
      "message": "x86, perf, bts, mm: Delete the never used BTS-ptrace code\n\nSupport for the PMU\u0027s BTS features has been upstreamed in\nv2.6.32, but we still have the old and disabled ptrace-BTS,\nas Linus noticed it not so long ago.\n\nIt\u0027s buggy: TIF_DEBUGCTLMSR is trampling all over that MSR without\nregard for other uses (perf) and doesn\u0027t provide the flexibility\nneeded for perf either.\n\nIts users are ptrace-block-step and ptrace-bts, since ptrace-bts\nwas never used and ptrace-block-step can be implemented using a\nmuch simpler approach.\n\nSo axe all 3000 lines of it. That includes the *locked_memory*()\nAPIs in mm/mlock.c as well.\n\nReported-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Markus Metzger \u003cmarkus.t.metzger@intel.com\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLKML-Reference: \u003c20100325135413.938004390@chello.nl\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "8bc037fb89bb3104b9ae290d18c877624cd7d9cc",
      "tree": "33a95e7bf529ea6bdb28d1dda86f49450f9dc883",
      "parents": [
        "c890692bf37671b5b78a1870d55d6d87e1c8a509"
      ],
      "author": {
        "name": "KOSAKI Motohiro",
        "email": "kosaki.motohiro@jp.fujitsu.com",
        "time": "Wed Mar 17 09:36:58 2010 +0900"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Mar 17 10:48:49 2010 +0100"
      },
      "message": "sched: Use proper type in sched_getaffinity()\n\nUsing the proper type fixes the following compiler warning:\n\n  kernel/sched.c:4850: warning: comparison of distinct pointer types lacks a cast\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: torvalds@linux-foundation.org\nCc: travis@sgi.com\nCc: peterz@infradead.org\nCc: drepper@redhat.com\nCc: rja@sgi.com\nCc: sharyath@in.ibm.com\nCc: steiner@sgi.com\nLKML-Reference: \u003c20100317090046.4C79.A69D9226@jp.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "c890692bf37671b5b78a1870d55d6d87e1c8a509",
      "tree": "70ffb80cf62eabaeabf334d08ae88aa63eccb5be",
      "parents": [
        "cd3d8031eb4311e516329aee03c79a08333141f1"
      ],
      "author": {
        "name": "Andrew Morton",
        "email": "akpm@linux-foundation.org",
        "time": "Thu Mar 11 14:08:43 2010 -0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Mar 16 11:13:42 2010 +0100"
      },
      "message": "kernel/sched.c: Suppress unused var warning\n\nOn UP:\n\n  kernel/sched.c: In function \u0027wake_up_new_task\u0027:\n  kernel/sched.c:2631: warning: unused variable \u0027cpu\u0027\n\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "cd3d8031eb4311e516329aee03c79a08333141f1",
      "tree": "b01d378aa94300acdbeef84c01f81ef405505bb1",
      "parents": [
        "a3d3203e4bb40f253b1541e310dc0f9305be7c84"
      ],
      "author": {
        "name": "KOSAKI Motohiro",
        "email": "kosaki.motohiro@jp.fujitsu.com",
        "time": "Fri Mar 12 16:15:36 2010 +0900"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon Mar 15 08:28:44 2010 +0100"
      },
      "message": "sched: sched_getaffinity(): Allow less than NR_CPUS length\n\n[ Note, this commit changes the syscall ABI for \u003e 1024 CPUs systems. ]\n\nRecently, some distro decided to use NR_CPUS\u003d4096 for mysterious reasons.\nUnfortunately, glibc sched interface has the following definition:\n\n\t# define __CPU_SETSIZE  1024\n\t# define __NCPUBITS     (8 * sizeof (__cpu_mask))\n\ttypedef unsigned long int __cpu_mask;\n\ttypedef struct\n\t{\n\t  __cpu_mask __bits[__CPU_SETSIZE / __NCPUBITS];\n\t} cpu_set_t;\n\nIt mean, if NR_CPUS is bigger than 1024, cpu_set_t makes an\nABI issue ...\n\nMore recently, Sharyathi Nagesh reported following test program makes\nmisterious syscall failure:\n\n -----------------------------------------------------------------------\n #define _GNU_SOURCE\n #include\u003cstdio.h\u003e\n #include\u003cerrno.h\u003e\n #include\u003csched.h\u003e\n\n int main()\n {\n     cpu_set_t set;\n     if (sched_getaffinity(0, sizeof(cpu_set_t), \u0026set) \u003c 0)\n         printf(\"\\n Call is failing with:%d\", errno);\n }\n -----------------------------------------------------------------------\n\nBecause the kernel assumes len argument of sched_getaffinity() is bigger\nthan NR_CPUS. But now it is not correct.\n\nNow we are faced with the following annoying dilemma, due to\nthe limitations of the glibc interface built in years ago:\n\n (1) if we change glibc\u0027s __CPU_SETSIZE definition, we lost\n     binary compatibility of _all_ application.\n\n (2) if we don\u0027t change it, we also lost binary compatibility of\n     Sharyathi\u0027s use case.\n\nThen, I would propse to change the rule of the len argument of\nsched_getaffinity().\n\nOld:\n\tlen should be bigger than NR_CPUS\nNew:\n\tlen should be bigger than maximum possible cpu id\n\nThis creates the following behavior:\n\n (A) In the real 4096 cpus machine, the above test program still\n     return -EINVAL.\n\n (B) NR_CPUS\u003d4096 but the machine have less than 1024 cpus (almost\n     all machines in the world), the above can run successfully.\n\nFortunatelly, BIG SGI machine is mainly used for HPC use case. It means\nthey can rebuild their programs.\n\nIOW we hope they are not annoyed by this issue ...\n\nReported-by: Sharyathi Nagesh \u003csharyath@in.ibm.com\u003e\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Ulrich Drepper \u003cdrepper@redhat.com\u003e\nAcked-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Jack Steiner \u003csteiner@sgi.com\u003e\nCc: Russ Anderson \u003crja@sgi.com\u003e\nCc: Mike Travis \u003ctravis@sgi.com\u003e\nLKML-Reference: \u003c20100312161316.9520.A69D9226@jp.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "80a186074e72e2cd61f6716d90cf32ce54981a56",
      "tree": "c5f75a83498df0ea2109067b797ec7986479dda0",
      "parents": [
        "15c989d4d14b82f43cae7efc6a7794cdd556f274",
        "3d07467b7aa91623b31d7b5888a123a2c8c8e9cc"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Mar 13 14:46:18 2010 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Mar 13 14:46:18 2010 -0800"
      },
      "message": "Merge branch \u0027sched-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027sched-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n  sched: Fix pick_next_highest_task_rt() for cgroups\n  sched: Cleanup: remove unused variable in try_to_wake_up()\n  x86: Fix sched_clock_cpu for systems with unsynchronized TSC\n"
    },
    {
      "commit": "c6ee36c423c3ed1fb86bb3eabba9fc256a300d16",
      "tree": "a7c98864e3a5c84fac57e8f0ce8777f83df81372",
      "parents": [
        "f2e74eeac03ffb779d64b66a643c5e598145a28b"
      ],
      "author": {
        "name": "Mike Galbraith",
        "email": "efault@gmx.de",
        "time": "Thu Mar 11 17:16:43 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Mar 11 18:32:53 2010 +0100"
      },
      "message": "sched: Remove SYNC_WAKEUPS feature\n\nSync wakeups are critical functionality with a long history.  Remove it, we don\u0027t\nneed the branch or icache footprint.\n\nSigned-off-by: Mike Galbraith \u003cefault@gmx.de\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1268301817.6785.47.camel@marge.simson.net\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "a64692a3afd85fe048551ab89142fd5ca99a0dbd",
      "tree": "7d2800efb7fb9e3aa5c99ab883004932fdc362c6",
      "parents": [
        "e12f31d3e5d36328c7fbd0fce40a95e70b59152c"
      ],
      "author": {
        "name": "Mike Galbraith",
        "email": "efault@gmx.de",
        "time": "Thu Mar 11 17:16:20 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Mar 11 18:32:50 2010 +0100"
      },
      "message": "sched: Cleanup/optimize clock updates\n\nNow that we no longer depend on the clock being updated prior to enqueueing\non migratory wakeup, we can clean up a bit, placing calls to update_rq_clock()\nexactly where they are needed, ie on enqueue, dequeue and schedule events.\n\nIn the case of a freshly enqueued task immediately preempting, we can skip the\nupdate during preemption, as the clock was just updated by the enqueue event.\nWe also save an unneeded call during a migratory wakeup by not updating the\nprevious runqueue, where update_curr() won\u0027t be invoked.\n\nSigned-off-by: Mike Galbraith \u003cefault@gmx.de\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1268301199.6785.32.camel@marge.simson.net\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "e12f31d3e5d36328c7fbd0fce40a95e70b59152c",
      "tree": "3eaee7fede5ba830395d2e527fdfe60f1aba73f4",
      "parents": [
        "b42e0c41a422a212ddea0666d5a3a0e3c35206db"
      ],
      "author": {
        "name": "Mike Galbraith",
        "email": "efault@gmx.de",
        "time": "Thu Mar 11 17:15:51 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Mar 11 18:32:50 2010 +0100"
      },
      "message": "sched: Remove avg_overlap\n\nBoth avg_overlap and avg_wakeup had an inherent problem in that their accuracy\nwas detrimentally affected by cross-cpu wakeups, this because we are missing\nthe necessary call to update_curr().  This can\u0027t be fixed without increasing\noverhead in our already too fat fastpath.\n\nAdditionally, with recent load balancing changes making us prefer to place tasks\nin an idle cache domain (which is good for compute bound loads), communicating\ntasks suffer when a sync wakeup, which would enable affine placement, is turned\ninto a non-sync wakeup by SYNC_LESS.  With one task on the runqueue, wake_affine()\nrejects the affine wakeup request, leaving the unfortunate where placed, taking\nfrequent cache misses.\n\nRemove it, and recover some fastpath cycles.\n\nSigned-off-by: Mike Galbraith \u003cefault@gmx.de\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1268301121.6785.30.camel@marge.simson.net\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "b42e0c41a422a212ddea0666d5a3a0e3c35206db",
      "tree": "443cf5918548cab86c3f9f3f34a1b700d809070b",
      "parents": [
        "39c0cbe2150cbd848a25ba6cdb271d1ad46818ad"
      ],
      "author": {
        "name": "Mike Galbraith",
        "email": "efault@gmx.de",
        "time": "Thu Mar 11 17:15:38 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Mar 11 18:32:50 2010 +0100"
      },
      "message": "sched: Remove avg_wakeup\n\nTesting the load which led to this heuristic (nfs4 kbuild) shows that it has\noutlived it\u0027s usefullness.  With intervening load balancing changes, I cannot\nsee any difference with/without, so recover there fastpath cycles.\n\nSigned-off-by: Mike Galbraith \u003cefault@gmx.de\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1268301062.6785.29.camel@marge.simson.net\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "39c0cbe2150cbd848a25ba6cdb271d1ad46818ad",
      "tree": "7b9c356b39a2b50219398ce534d7d64e7ab4bf06",
      "parents": [
        "41acab8851a0408c1d5ad6c21a07456f88b54d40"
      ],
      "author": {
        "name": "Mike Galbraith",
        "email": "efault@gmx.de",
        "time": "Thu Mar 11 17:17:13 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Mar 11 18:32:49 2010 +0100"
      },
      "message": "sched: Rate-limit nohz\n\nEntering nohz code on every micro-idle is costing ~10% throughput for netperf\nTCP_RR when scheduling cross-cpu.  Rate limiting entry fixes this, but raises\nticks a bit.  On my Q6600, an idle box goes from ~85 interrupts/sec to 128.\n\nThe higher the context switch rate, the more nohz entry costs.  With this patch\nand some cycle recovery patches in my tree, max cross cpu context switch rate is\nimproved by ~16%, a large portion of which of which is this ratelimiting.\n\nSigned-off-by: Mike Galbraith \u003cefault@gmx.de\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1268301003.6785.28.camel@marge.simson.net\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "41acab8851a0408c1d5ad6c21a07456f88b54d40",
      "tree": "28b23b930571c1f6dfd5c4e8129a2a7ea2056307",
      "parents": [
        "3d07467b7aa91623b31d7b5888a123a2c8c8e9cc"
      ],
      "author": {
        "name": "Lucas De Marchi",
        "email": "lucas.de.marchi@gmail.com",
        "time": "Wed Mar 10 23:37:45 2010 -0300"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Mar 11 15:22:28 2010 +0100"
      },
      "message": "sched: Implement group scheduler statistics in one struct\n\nPut all statistic fields of sched_entity in one struct, sched_statistics,\nand embed it into sched_entity.\n\nThis change allows to memset the sched_statistics to 0 when needed (for\ninstance when forking), avoiding bugs of non initialized fields.\n\nSigned-off-by: Lucas De Marchi \u003clucas.de.marchi@gmail.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1268275065-18542-1-git-send-email-lucas.de.marchi@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "ab3b3aa5dd01b3aaa6b15caee113b21b1b6520c4",
      "tree": "22801ccd492e5b6927e77aacf24aa61010b3363c",
      "parents": [
        "14be1f7454ea96ee614467a49cf018a1a383b189"
      ],
      "author": {
        "name": "Dan Carpenter",
        "email": "error27@gmail.com",
        "time": "Sat Mar 06 14:17:52 2010 +0300"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Mar 11 13:59:59 2010 +0100"
      },
      "message": "sched: Cleanup: remove unused variable in try_to_wake_up()\n\nWe haven\u0027t used the \"orig_rq\" variable since\n055a00865d \"Fix/add missing update_rq_clock() calls\"\n\nSigned-off-by: Dan Carpenter \u003cerror27@gmail.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Andreas Herrmann \u003candreas.herrmann3@amd.com\u003e\nCc: Gautham R Shenoy \u003cego@in.ibm.com\u003e\nCc: efault@gmx.de\nLKML-Reference: \u003c20100306111752.GL4958@bicker\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "c9be0a36f9bf392a7984473124a67a12964df11f",
      "tree": "23fcf49f277d9a093b2b29831811219410ad7b05",
      "parents": [
        "3d03ba4d1dd2246adff5a9ff1194a539b3bc05a7"
      ],
      "author": {
        "name": "Andi Kleen",
        "email": "andi@firstfloor.org",
        "time": "Tue Jan 05 12:47:58 2010 +0100"
      },
      "committer": {
        "name": "Greg Kroah-Hartman",
        "email": "gregkh@suse.de",
        "time": "Sun Mar 07 17:04:47 2010 -0800"
      },
      "message": "sysdev: Pass attribute in sysdev_class attributes show/store\n\nPassing the attribute to the low level IO functions allows all kinds\nof cleanups, by sharing low level IO code without requiring\nan own function for every piece of data.\n\nAlso drivers can extend the attributes with own data fields\nand use that in the low level function.\n\nSimilar to sysdev_attributes and normal attributes.\n\nThis is a tree-wide sweep, converting everything in one go.\n\nNo functional changes in this patch other than passing the new\nargument everywhere.\n\nTested on x86, the non x86 parts are uncompiled.\n\nSigned-off-by: Andi Kleen \u003cak@linux.intel.com\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\n\n\n"
    },
    {
      "commit": "78d7d407b62a021e6d2e8dc24c0b90e390ab58a1",
      "tree": "8c1074b84db4b977bad6802a3701e0113c0a7739",
      "parents": [
        "d4bb527438b4181cd3c564ae04dd344c381283a1"
      ],
      "author": {
        "name": "Jiri Slaby",
        "email": "jslaby@suse.cz",
        "time": "Fri Mar 05 13:42:54 2010 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Mar 06 11:26:33 2010 -0800"
      },
      "message": "kernel core: use helpers for rlimits\n\nMake sure compiler won\u0027t do weird things with limits.  E.g.  fetching them\ntwice may return 2 different values after writable limits are implemented.\n\nI.e.  either use rlimit helpers added in commit 3e10e716abf3 (\"resource:\nadd helpers for fetching rlimits\") or ACCESS_ONCE if not applicable.\n\nSigned-off-by: Jiri Slaby \u003cjslaby@suse.cz\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: john stultz \u003cjohnstul@us.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": "0a135ba14d71fb84c691a5386aff5049691fe6d7",
      "tree": "adb1de887dd6839d69d2fc16ffa2a10ff63298fa",
      "parents": [
        "4850f524b2c4c8a4e9f8ef4dd9c7c4afde2f2b2c",
        "a29d8b8e2d811a24bbe49215a0f0c536b72ebc18"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Mar 03 07:34:18 2010 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Mar 03 07:34:18 2010 -0800"
      },
      "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:\n  percpu: add __percpu sparse annotations to what\u0027s left\n  percpu: add __percpu sparse annotations to fs\n  percpu: add __percpu sparse annotations to core kernel subsystems\n  local_t: Remove leftover local.h\n  this_cpu: Remove pageset_notifier\n  this_cpu: Page allocator conversion\n  percpu, x86: Generic inc / dec percpu instructions\n  local_t: Move local.h include to ringbuffer.c and ring_buffer_benchmark.c\n  module: Use this_cpu_xx to dynamically allocate counters\n  local_t: Remove cpu_local_xx macros\n  percpu: refactor the code in pcpu_[de]populate_chunk()\n  percpu: remove compile warnings caused by __verify_pcpu_ptr()\n  percpu: make accessors check for percpu pointer in sparse\n  percpu: add __percpu for sparse.\n  percpu: make access macros universal\n  percpu: remove per_cpu__ prefix.\n"
    },
    {
      "commit": "f66ffdedbf0fc059a92219bb08c1dbcac88f074b",
      "tree": "9db4ad51764455123130e82fb7acf4f0a0be58ce",
      "parents": [
        "2531216f236cb2a1f39ffa12a4a9339541e52191",
        "dd5feea14a7de4edbd9f36db1a2db785de91b88d"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun Feb 28 10:31:01 2010 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun Feb 28 10:31:01 2010 -0800"
      },
      "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: (25 commits)\n  sched: Fix SCHED_MC regression caused by change in sched cpu_power\n  sched: Don\u0027t use possibly stale sched_class\n  kthread, sched: Remove reference to kthread_create_on_cpu\n  sched: cpuacct: Use bigger percpu counter batch values for stats counters\n  percpu_counter: Make __percpu_counter_add an inline function on UP\n  sched: Remove member rt_se from struct rt_rq\n  sched: Change usage of rt_rq-\u003ert_se to rt_rq-\u003etg-\u003ert_se[cpu]\n  sched: Remove unused update_shares_locked()\n  sched: Use for_each_bit\n  sched: Queue a deboosted task to the head of the RT prio queue\n  sched: Implement head queueing for sched_rt\n  sched: Extend enqueue_task to allow head queueing\n  sched: Remove USER_SCHED\n  sched: Fix the place where group powers are updated\n  sched: Assume *balance is valid\n  sched: Remove load_balance_newidle()\n  sched: Unify load_balance{,_newidle}()\n  sched: Add a lock break for PREEMPT\u003dy\n  sched: Remove from fwd decls\n  sched: Remove rq_iterator from move_one_task\n  ...\n\nFix up trivial conflicts in kernel/sched.c\n"
    },
    {
      "commit": "2531216f236cb2a1f39ffa12a4a9339541e52191",
      "tree": "74ca94a99a00ebca463ca67458b8099728cece15",
      "parents": [
        "6556a6743549defc32e5f90ee2cb1ecd833a44c3",
        "0970d2992dfd7d5ec2c787417cf464f01eeaf42a"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun Feb 28 10:23:41 2010 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun Feb 28 10:23:41 2010 -0800"
      },
      "message": "Merge branch \u0027sched-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027sched-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n  sched: Fix race between ttwu() and task_rq_lock()\n  sched: Fix SMT scheduler regression in find_busiest_queue()\n  sched: Fix sched_mv_power_savings for !SMT\n  kernel/sched.c: Suppress unused var warning\n"
    },
    {
      "commit": "6556a6743549defc32e5f90ee2cb1ecd833a44c3",
      "tree": "622306583d4a3c13235a8bfc012854c125c597f1",
      "parents": [
        "e0d272429a34ff143bfa04ee8e29dd4eed2964c7",
        "1dd2980d990068e20045b90c424518cc7f3657ff"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun Feb 28 10:20:25 2010 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun Feb 28 10:20:25 2010 -0800"
      },
      "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: (172 commits)\n  perf_event, amd: Fix spinlock initialization\n  perf_event: Fix preempt warning in perf_clock()\n  perf tools: Flush maps on COMM events\n  perf_events, x86: Split PMU definitions into separate files\n  perf annotate: Handle samples not at objdump output addr boundaries\n  perf_events, x86: Remove superflous MSR writes\n  perf_events: Simplify code by removing cpu argument to hw_perf_group_sched_in()\n  perf_events, x86: AMD event scheduling\n  perf_events: Add new start/stop PMU callbacks\n  perf_events: Report the MMAP pgoff value in bytes\n  perf annotate: Defer allocating sym_priv-\u003ehist array\n  perf symbols: Improve debugging information about symtab origins\n  perf top: Use a macro instead of a constant variable\n  perf symbols: Check the right return variable\n  perf/scripts: Tag syscall_name helper as not yet available\n  perf/scripts: Add perf-trace-python Documentation\n  perf/scripts: Remove unnecessary PyTuple resizes\n  perf/scripts: Add syscall tracing scripts\n  perf/scripts: Add Python scripting engine\n  perf/scripts: Remove check-perf-trace from listed scripts\n  ...\n\nFix trivial conflict in tools/perf/util/probe-event.c\n"
    },
    {
      "commit": "497f0ab39cd25bed317b29482c147c967f7ecd1f",
      "tree": "34c90806c174ae423112f86a4055c07af7734b4b",
      "parents": [
        "d11c563dd20ff35da5652c3e1c989d9e10e1d6d0"
      ],
      "author": {
        "name": "Paul E. McKenney",
        "email": "paulmck@linux.vnet.ibm.com",
        "time": "Mon Feb 22 17:04:51 2010 -0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Feb 25 10:34:47 2010 +0100"
      },
      "message": "sched: Better name for for_each_domain_rd\n\nAs suggested by Peter Ziljstra, make better choice of name\nfor for_each_domain_rd(), containing \"rcu_dereference\", given\nthat it is but a wrapper for rcu_dereference_check().  The name\nrcu_dereference_check_sched_domain() does that and provides a\nseparate per-subsystem name space.\n\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\nLKML-Reference: \u003c1266887105-1528-7-git-send-email-paulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "d11c563dd20ff35da5652c3e1c989d9e10e1d6d0",
      "tree": "b189f50de7a01d7603935d4da7e755d764dfe67e",
      "parents": [
        "a898def29e4119bc01ebe7ca97423181f4c0ea2d"
      ],
      "author": {
        "name": "Paul E. McKenney",
        "email": "paulmck@linux.vnet.ibm.com",
        "time": "Mon Feb 22 17:04:50 2010 -0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Feb 25 10:34:26 2010 +0100"
      },
      "message": "sched: Use lockdep-based checking on rcu_dereference()\n\nUpdate the rcu_dereference() usages to take advantage of the new\nlockdep-based checking.\n\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\nLKML-Reference: \u003c1266887105-1528-6-git-send-email-paulmck@linux.vnet.ibm.com\u003e\n[ -v2: fix allmodconfig missing symbol export build failure on x86 ]\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "83ab0aa0d5623d823444db82c3b3c34d7ec364ae",
      "tree": "7ec14a5e163cb2e17fbfe06b368b4969b78879bd",
      "parents": [
        "6e40f5bbbc734231bc5809d3eb785e3c21f275d7"
      ],
      "author": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Wed Feb 17 09:05:48 2010 +0100"
      },
      "committer": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Wed Feb 17 11:58:18 2010 +0100"
      },
      "message": "sched: Don\u0027t use possibly stale sched_class\n\nsetscheduler() saves task-\u003esched_class outside of the rq-\u003elock held\nregion for a check after the setscheduler changes have become\neffective. That might result in checking a stale value.\n\nrtmutex_setprio() has the same problem, though it is protected by\np-\u003epi_lock against setscheduler(), but for correctness sake (and to\navoid bad examples) it needs to be fixed as well.\n\nRetrieve task-\u003esched_class inside of the rq-\u003elock held region.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nAcked-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: stable@kernel.org\n"
    },
    {
      "commit": "43cf38eb5cea91245502df3fcee4dbfc1c74dd1c",
      "tree": "a58ea87af1f07b8aed4941db074f44103f321f6e",
      "parents": [
        "ab386128f20c44c458a90039ab1bdc265ac474c9"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Feb 02 14:38:57 2010 +0900"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Wed Feb 17 11:17:38 2010 +0900"
      },
      "message": "percpu: add __percpu sparse annotations to core kernel subsystems\n\nAdd __percpu sparse annotations to core subsystems.\n\nThese annotations are to make sparse consider percpu variables to be\nin a different address space and warn if accessed without going\nthrough percpu accessors.  This patch doesn\u0027t affect normal builds.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nAcked-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Jens Axboe \u003caxboe@kernel.dk\u003e\nCc: linux-mm@kvack.org\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nCc: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Eric Biederman \u003cebiederm@xmission.com\u003e\n"
    },
    {
      "commit": "6e40f5bbbc734231bc5809d3eb785e3c21f275d7",
      "tree": "8520fc84d9643502ebe86233cefcd774e2babf72",
      "parents": [
        "301ba0457f1ed853fc08e57785f8c87fe7e49c68",
        "0970d2992dfd7d5ec2c787417cf464f01eeaf42a"
      ],
      "author": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Tue Feb 16 16:48:56 2010 +0100"
      },
      "committer": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Tue Feb 16 16:48:56 2010 +0100"
      },
      "message": "Merge branch \u0027sched/urgent\u0027 into sched/core\n\nConflicts: kernel/sched.c\n\nNecessary due to the urgent fixes which conflict with the code move\nfrom sched.c to sched_fair.c\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n"
    },
    {
      "commit": "0970d2992dfd7d5ec2c787417cf464f01eeaf42a",
      "tree": "5f0077dcafda733ef3f1e41d218a473978ce6a9f",
      "parents": [
        "9000f05c6d1607f79c0deacf42b09693be673f4c"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Mon Feb 15 14:45:54 2010 +0100"
      },
      "committer": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Tue Feb 16 15:13:59 2010 +0100"
      },
      "message": "sched: Fix race between ttwu() and task_rq_lock()\n\nThomas found that due to ttwu() changing a task\u0027s cpu without holding\nthe rq-\u003elock, task_rq_lock() might end up locking the wrong rq.\n\nAvoid this by serializing against TASK_WAKING.\n\nReported-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1266241712.15770.420.camel@laptop\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n"
    },
    {
      "commit": "9000f05c6d1607f79c0deacf42b09693be673f4c",
      "tree": "de24233877ccf6008bd65278820251bac442fa97",
      "parents": [
        "28f5318167adf23b16c844b9c2253f355cb21796"
      ],
      "author": {
        "name": "Suresh Siddha",
        "email": "suresh.b.siddha@intel.com",
        "time": "Fri Feb 12 17:14:22 2010 -0800"
      },
      "committer": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Tue Feb 16 15:13:59 2010 +0100"
      },
      "message": "sched: Fix SMT scheduler regression in find_busiest_queue()\n\nFix a SMT scheduler performance regression that is leading to a scenario\nwhere SMT threads in one core are completely idle while both the SMT threads\nin another core (on the same socket) are busy.\n\nThis is caused by this commit (with the problematic code highlighted)\n\n   commit bdb94aa5dbd8b55e75f5a50b61312fe589e2c2d1\n   Author: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\n   Date:   Tue Sep 1 10:34:38 2009 +0200\n\n   sched: Try to deal with low capacity\n\n   @@ -4203,15 +4223,18 @@ find_busiest_queue()\n   ...\n\tfor_each_cpu(i, sched_group_cpus(group)) {\n   +\tunsigned long power \u003d power_of(i);\n\n   ...\n\n   -\twl \u003d weighted_cpuload(i);\n   +\twl \u003d weighted_cpuload(i) * SCHED_LOAD_SCALE;\n   +\twl /\u003d power;\n\n   -\tif (rq-\u003enr_running \u003d\u003d 1 \u0026\u0026 wl \u003e imbalance)\n   +\tif (capacity \u0026\u0026 rq-\u003enr_running \u003d\u003d 1 \u0026\u0026 wl \u003e imbalance)\n\t\tcontinue;\n\nOn a SMT system, power of the HT logical cpu will be 589 and\nthe scheduler load imbalance (for scenarios like the one mentioned above)\ncan be approximately 1024 (SCHED_LOAD_SCALE). The above change of scaling\nthe weighted load with the power will result in \"wl \u003e imbalance\" and\nultimately resulting in find_busiest_queue() return NULL, causing\nload_balance() to think that the load is well balanced. But infact\none of the tasks can be moved to the idle core for optimal performance.\n\nWe don\u0027t need to use the weighted load (wl) scaled by the cpu power to\ncompare with  imabalance. In that condition, we already know there is only a\nsingle task \"rq-\u003enr_running \u003d\u003d 1\" and the comparison between imbalance,\nwl is to make sure that we select the correct priority thread which matches\nimbalance. So we really need to compare the imabalnce with the original\nweighted load of the cpu and not the scaled load.\n\nBut in other conditions where we want the most hammered(busiest) cpu, we can\nuse scaled load to ensure that we consider the cpu power in addition to the\nactual load on that cpu, so that we can move the load away from the\nguy that is getting most hammered with respect to the actual capacity,\nas compared with the rest of the cpu\u0027s in that busiest group.\n\nFix it.\n\nReported-by: Ma Ling \u003cling.ma@intel.com\u003e\nInitial-Analysis-by: Zhang, Yanmin \u003cyanmin_zhang@linux.intel.com\u003e\nSigned-off-by: Suresh Siddha \u003csuresh.b.siddha@intel.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1266023662.2808.118.camel@sbs-t61.sc.intel.com\u003e\nCc: stable@kernel.org [2.6.32.x]\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n"
    },
    {
      "commit": "fa535a77bd3fa32b9215ba375d6a202fe73e1dd6",
      "tree": "a82c7c10a3a6eaf19e873863c98a0d5c83fd965e",
      "parents": [
        "0c9cf2efd74dbc90354e2ccc7dbd6bad68ec6c4d"
      ],
      "author": {
        "name": "Anton Blanchard",
        "email": "anton@samba.org",
        "time": "Tue Feb 02 14:46:13 2010 -0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon Feb 08 08:57:37 2010 +0100"
      },
      "message": "sched: cpuacct: Use bigger percpu counter batch values for stats counters\n\nWhen CONFIG_VIRT_CPU_ACCOUNTING and CONFIG_CGROUP_CPUACCT are\nenabled we can call cpuacct_update_stats with values much larger\nthan percpu_counter_batch.  This means the call to\npercpu_counter_add will always add to the global count which is\nprotected by a spinlock and we end up with a global spinlock in\nthe scheduler.\n\nBased on an idea by KOSAKI Motohiro, this patch scales the batch\nvalue by cputime_one_jiffy such that we have the same batch\nlimit as we would if CONFIG_VIRT_CPU_ACCOUNTING was disabled.\nHis patch did this once at boot but that initialisation happened\ntoo early on PowerPC (before time_init) and it was never updated\nat runtime as a result of a hotplug cpu add/remove.\n\nThis patch instead scales percpu_counter_batch by\ncputime_one_jiffy at runtime, which keeps the batch correct even\nafter cpu hotplug operations.  We cap it at INT_MAX in case of\noverflow.\n\nFor architectures that do not support\nCONFIG_VIRT_CPU_ACCOUNTING, cputime_one_jiffy is the constant 1\nand gcc is smart enough to optimise min(s32\npercpu_counter_batch, INT_MAX) to just percpu_counter_batch at\nleast on x86 and PowerPC.  So there is no need to add an #ifdef.\n\nOn a 64 thread PowerPC box with CONFIG_VIRT_CPU_ACCOUNTING and\nCONFIG_CGROUP_CPUACCT enabled, a context switch microbenchmark\nis 234x faster and almost matches a CONFIG_CGROUP_CPUACCT\ndisabled kernel:\n\n CONFIG_CGROUP_CPUACCT disabled:   16906698 ctx switches/sec\n CONFIG_CGROUP_CPUACCT enabled:       61720 ctx switches/sec\n CONFIG_CGROUP_CPUACCT + patch:\t   16663217 ctx switches/sec\n\nTested with:\n\n wget http://ozlabs.org/~anton/junkcode/context_switch.c\n make context_switch\n for i in `seq 0 63`; do taskset -c $i ./context_switch \u0026 done\n vmstat 1\n\nSigned-off-by: Anton Blanchard \u003canton@samba.org\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nTested-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: \"Luck, Tony\" \u003ctony.luck@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "6d3e0907b8b239d16720d144e2675ecf10d3bc3b",
      "tree": "e0b0743b5f6f82b057cafc4f3687396a6e01a0b4",
      "parents": [
        "23577256953c870de9b724c3a2611ce7be6a1e4e",
        "50200df462023b187d80a99a52f5f2cfe3c86c26"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon Feb 08 08:55:43 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon Feb 08 08:55:46 2010 +0100"
      },
      "message": "Merge branch \u0027sched/urgent\u0027 into sched/core\n\nMerge reason: Merge dependent fix, update to latest -rc.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "50200df462023b187d80a99a52f5f2cfe3c86c26",
      "tree": "6337bc5150b89461b2dd80332ce0cf8069df2819",
      "parents": [
        "29275254caedfedce960cfe6df24b90cb04fe431"
      ],
      "author": {
        "name": "Andrew Morton",
        "email": "akpm@linux-foundation.org",
        "time": "Tue Feb 02 14:46:13 2010 -0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon Feb 08 08:53:19 2010 +0100"
      },
      "message": "kernel/sched.c: Suppress unused var warning\n\nOn UP:\n\n kernel/sched.c: In function \u0027wake_up_new_task\u0027:\n kernel/sched.c:2631: warning: unused variable \u0027cpu\u0027\n\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "23577256953c870de9b724c3a2611ce7be6a1e4e",
      "tree": "3985914f7728d2353933cf2ff72af1bd07295e1c",
      "parents": [
        "74b7eb5885415ed41d012f432398d1b697115b5f"
      ],
      "author": {
        "name": "Yong Zhang",
        "email": "yong.zhang0@gmail.com",
        "time": "Fri Jan 29 14:58:47 2010 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Feb 04 09:57:33 2010 +0100"
      },
      "message": "sched: Remove member rt_se from struct rt_rq\n\nIt\u0027s a duplicate of tg-\u003ert_se[cpu] and the only usage is\nsched_rt_rq_dequeue() and sched_rt_rq_enqueue(). After the\nfirst patch to those two function. rt_se can be removed.\n\nSigned-off-by: Yong Zhang \u003cyong.zhang0@gmail.com\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c2674af741001282258q38781619u653ca4a7dd267347@mail.gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "4a461c85b643258e305eb5a3aced34009db2f818",
      "tree": "fa5a05156908bfe89c0e3113afee40a1048987fe",
      "parents": [
        "90fdbdb48442a03c72cae5463e6edb64cb3a3a7d"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "peterz@infradead.org",
        "time": "Mon Feb 01 11:13:39 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Feb 02 06:58:27 2010 +0100"
      },
      "message": "sched: Remove unused update_shares_locked()\n\nCommit f492e12ef050e02bf0185b6b57874992591b9be1 (\"sched: Remove\nload_balance_newidle()\") removed the only user of this function,\nso remove it too.\n\nReported-by: Stephen Rothwell \u003csfr@canb.auug.org.au\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1265019219.24455.128.camel@laptop\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "ae7f6711d6231c9ba54feb5ba9856c3775e482f8",
      "tree": "89070c82204b2503348e4fd6c51d25a169375545",
      "parents": [
        "64abebf731df87e6f4ae7d9ffc340bdf0c033e44",
        "b23ff0e9330e4b11e18af984d50573598e10e7f9"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Jan 29 09:24:57 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Jan 29 10:36:22 2010 +0100"
      },
      "message": "Merge branch \u0027perf/urgent\u0027 into perf/core\n\nMerge reason: We want to queue up a dependent patch. Also update to\n              later -rc\u0027s.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "60db48cacb9b253d5607a5ff206112a59cd09e34",
      "tree": "7fc9be93263ae40381cdafe3cb31c4521e88f2dd",
      "parents": [
        "37dad3fce97f01e5149d69de0833d8452c0e862e"
      ],
      "author": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Wed Jan 20 20:59:06 2010 +0000"
      },
      "committer": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Fri Jan 22 18:09:59 2010 +0100"
      },
      "message": "sched: Queue a deboosted task to the head of the RT prio queue\n\nrtmutex_set_prio() is used to implement priority inheritance for\nfutexes. When a task is deboosted it gets enqueued at the tail of its\nRT priority list. This is violating the POSIX scheduling semantics:\n\nrt priority list X contains two runnable tasks A and B\n\ntask A\t runs with priority X and holds mutex M\ntask C\t preempts A and is blocked on mutex M \n     \t -\u003e task A is boosted to priority of task C (Y)\ntask A\t unlocks the mutex M and deboosts itself\n     \t -\u003e A is dequeued from rt priority list Y\n\t -\u003e A is enqueued to the tail of rt priority list X\ntask C\t schedules away\ntask B\t runs\n\nThis is wrong as task A did not schedule away and therefor violates\nthe POSIX scheduling semantics.\n\nEnqueue the task to the head of the priority list instead. \n\nReported-by: Mathias Weber \u003cmathias.weber.mw1@roche.com\u003e\nReported-by: Carsten Emde \u003ccbe@osadl.org\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nAcked-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nTested-by: Carsten Emde \u003ccbe@osadl.org\u003e\nTested-by: Mathias Weber \u003cmathias.weber.mw1@roche.com\u003e\nLKML-Reference: \u003c20100120171629.809074113@linutronix.de\u003e\n"
    },
    {
      "commit": "ea87bb7853168434f4a82426dd1ea8421f9e604d",
      "tree": "fcadec9b0fd1c57e4d1b625e2492c13c852972f1",
      "parents": [
        "7c9414385ebfdd87cc542d4e7e3bb0dbb2d3ce25"
      ],
      "author": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Wed Jan 20 20:58:57 2010 +0000"
      },
      "committer": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Fri Jan 22 18:09:59 2010 +0100"
      },
      "message": "sched: Extend enqueue_task to allow head queueing\n\nThe ability of enqueueing a task to the head of a SCHED_FIFO priority\nlist is required to fix some violations of POSIX scheduling policy.\n\nExtend the related functions with a \"head\" argument.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nAcked-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nTested-by: Carsten Emde \u003ccbe@osadl.org\u003e\nTested-by: Mathias Weber \u003cmathias.weber.mw1@roche.com\u003e\nLKML-Reference: \u003c20100120171629.734886007@linutronix.de\u003e\n\n"
    },
    {
      "commit": "fabf318e5e4bda0aca2b0d617b191884fda62703",
      "tree": "651b2ee4fb8f393d2fe93f133a5ec6129cb7a8e8",
      "parents": [
        "6d558c3ac9b6508d26fd5cadccce51fc9d726b1c"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Thu Jan 21 21:04:57 2010 +0100"
      },
      "committer": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Thu Jan 21 23:25:31 2010 +0100"
      },
      "message": "sched: Fix fork vs hotplug vs cpuset namespaces\n\nThere are a number of issues:\n\n1) TASK_WAKING vs cgroup_clone (cpusets)\n\ncopy_process():\n\n  sched_fork()\n    child-\u003estate \u003d TASK_WAKING; /* waiting for wake_up_new_task() */\n  if (current-\u003ensproxy !\u003d p-\u003ensproxy)\n     ns_cgroup_clone()\n       cgroup_clone()\n         mutex_lock(inode-\u003ei_mutex)\n         mutex_lock(cgroup_mutex)\n         cgroup_attach_task()\n\t   ss-\u003ecan_attach()\n           ss-\u003eattach() [ -\u003e cpuset_attach() ]\n             cpuset_attach_task()\n               set_cpus_allowed_ptr();\n                 while (child-\u003estate \u003d\u003d TASK_WAKING)\n                   cpu_relax();\nwill deadlock the system.\n\n\n2) cgroup_clone (cpusets) vs copy_process\n\nSo even if the above would work we still have:\n\ncopy_process():\n\n  if (current-\u003ensproxy !\u003d p-\u003ensproxy)\n     ns_cgroup_clone()\n       cgroup_clone()\n         mutex_lock(inode-\u003ei_mutex)\n         mutex_lock(cgroup_mutex)\n         cgroup_attach_task()\n\t   ss-\u003ecan_attach()\n           ss-\u003eattach() [ -\u003e cpuset_attach() ]\n             cpuset_attach_task()\n               set_cpus_allowed_ptr();\n  ...\n\n  p-\u003ecpus_allowed \u003d current-\u003ecpus_allowed\n\nover-writing the modified cpus_allowed.\n\n\n3) fork() vs hotplug\n\n  if we unplug the child\u0027s cpu after the sanity check when the child\n  gets attached to the task_list but before wake_up_new_task() shit\n  will meet with fan.\n\nSolve all these issues by moving fork cpu selection into\nwake_up_new_task().\n\nReported-by: Serge E. Hallyn \u003cserue@us.ibm.com\u003e\nTested-by: Serge E. Hallyn \u003cserue@us.ibm.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1264106190.4283.1314.camel@laptop\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n"
    },
    {
      "commit": "7c9414385ebfdd87cc542d4e7e3bb0dbb2d3ce25",
      "tree": "beb51d7d0d543d72e2754cff807df5c399f2d376",
      "parents": [
        "871e35bc9733f273eaf5ceb69bbd0423b58e5285"
      ],
      "author": {
        "name": "Dhaval Giani",
        "email": "dhaval.giani@gmail.com",
        "time": "Wed Jan 20 13:26:18 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Jan 21 13:40:18 2010 +0100"
      },
      "message": "sched: Remove USER_SCHED\n\nRemove the USER_SCHED feature. It has been scheduled to be removed in\n2.6.34 as per http://marc.info/?l\u003dlinux-kernel\u0026m\u003d125728479022976\u0026w\u003d2\n\nSigned-off-by: Dhaval Giani \u003cdhaval.giani@gmail.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1263990378.24844.3.camel@localhost\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "3d45fd804a95055ecab5b3eed81f5ab2dbb047a2",
      "tree": "3ac7d2dbe75c4e406864b7d8c895f9318f308575",
      "parents": [
        "1e3c88bdeb1260edc341e45c9fb8efd182a5c511"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Thu Dec 17 17:12:46 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Jan 21 13:40:09 2010 +0100"
      },
      "message": "sched: Remove the sched_class load_balance methods\n\nTake out the sched_class methods for load-balancing.\n\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": "1e3c88bdeb1260edc341e45c9fb8efd182a5c511",
      "tree": "532da8871a2a1954ecaa1bb35bdfa7386087fd7d",
      "parents": [
        "6d686f4564f3fc7c6e678852919e48ad331d276b"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Thu Dec 17 17:00:43 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Jan 21 13:40:08 2010 +0100"
      },
      "message": "sched: Move load balance code into sched_fair.c\n\nStraight fwd code movement.\n\nSince non of the load-balance abstractions are used anymore, do away with\nthem and simplify the code some. In preparation move the code around.\n\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": "6d558c3ac9b6508d26fd5cadccce51fc9d726b1c",
      "tree": "dbad2aa9c5874ea7ee5fff1f9f32b0be208c3df6",
      "parents": [
        "50b926e439620c469565e8be0f28be78f5fca1ce"
      ],
      "author": {
        "name": "Yong Zhang",
        "email": "yong.zhang0@gmail.com",
        "time": "Mon Jan 11 14:21:25 2010 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Jan 21 13:39:04 2010 +0100"
      },
      "message": "sched: Reassign prev and switch_count when reacquire_kernel_lock() fail\n\nAssume A-\u003eB schedule is processing, if B have acquired BKL before and it\nneed reschedule this time. Then on B\u0027s context, it will go to\nneed_resched_nonpreemptible for reschedule. But at this time, prev and\nswitch_count are related to A. It\u0027s wrong and will lead to incorrect\nscheduler statistics.\n\nSigned-off-by: Yong Zhang \u003cyong.zhang0@gmail.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c2674af741001102238w7b0ddcadref00d345e2181d11@mail.gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "8381f65d097dad90416808314737dd7d3ae38ea9",
      "tree": "7cd0db1b5b719a629962571fdc26fd69bdee573c",
      "parents": [
        "cf5531148ff34938840d6da775c0a4ace442d573"
      ],
      "author": {
        "name": "Jamie Iles",
        "email": "jamie.iles@picochip.com",
        "time": "Fri Jan 08 15:27:33 2010 +0000"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Jan 13 10:43:08 2010 +0100"
      },
      "message": "sched/perf: Make sure irqs are disabled for perf_event_task_sched_in()\n\nperf_event_task_sched_in() expects interrupts to be disabled,\nbut on architectures with __ARCH_WANT_INTERRUPTS_ON_CTXSW\ndefined, this isn\u0027t true. If this is defined, disable irqs\naround the call in finish_task_switch().\n\nSigned-off-by: Jamie Iles \u003cjamie.iles@picochip.com\u003e\nAcked-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Russell King - ARM Linux \u003clinux@arm.linux.org.uk\u003e\nLKML-Reference: \u003c1262964453-27370-1-git-send-email-jamie.iles@picochip.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "61405fea92c42d072d9b8bd189689f1502a838af",
      "tree": "013ea3e7ed71f4114004d5852d40b6e89e128f76",
      "parents": [
        "9c443dfdd31eddea6cbe6ee0ca469fbcc4e1dc3b",
        "1703f2c321a8a531c393e137a82602e16c6061cb"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Jan 13 09:58:37 2010 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Jan 13 10:08:50 2010 +0100"
      },
      "message": "Merge branch \u0027perf/urgent\u0027 into perf/core\n\nMerge reason: queue up dependent patch, update to -rc4\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "d894837f23f491aa7ed167aae767fc07cfe6e6e6",
      "tree": "33ee2a3526d3ed9889d385233c9f2feb4bdbc835",
      "parents": [
        "6b7b284958d47b77d06745b36bc7f36dab769d9b"
      ],
      "author": {
        "name": "Simon Kagstrom",
        "email": "simon.kagstrom@netinsight.net",
        "time": "Wed Dec 23 11:08:18 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon Dec 28 10:50:13 2009 +0100"
      },
      "message": "sched: might_sleep(): Make file parameter const char *\n\nFixes a warning when building with g++:\n\n warning: deprecated conversion from string constant to \u0027char*\u0027\n\nAnd the file parameter use is constant, so mark it as such.\n\nSigned-off-by: Simon Kagstrom \u003csimon.kagstrom@netinsight.net\u003e\nCc: peterz@infradead.org\nLKML-Reference: \u003c20091223110818.442d848e@marrow.netinsight.se\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "49f474331e563a6ecf3b1e87ec27ec5482b3e4f1",
      "tree": "e3e4b5c718fd3d35ce01d4fe015886d9f3336760",
      "parents": [
        "4cf40131a5cf4918e83b3756e58a1fc9e984f8ef"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Sun Dec 27 11:51:52 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon Dec 28 09:21:33 2009 +0100"
      },
      "message": "perf events: Remove arg from perf sched hooks\n\nSince we only ever schedule the local cpu, there is no need to pass the\ncpu number to the perf sched hooks.\n\nThis micro-optimizes things a bit.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\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": "0c69774e6ce94364cfaa8bdeb18061edc414bc5a",
      "tree": "b83fdb55af2f9b9dddcab4a273739ebe1c810594",
      "parents": [
        "f7b84a6ba7eaeba4e1df8feddca1473a7db369a5"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "peterz@infradead.org",
        "time": "Tue Dec 22 15:43:19 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Dec 23 10:04:10 2009 +0100"
      },
      "message": "sched: Revert 738d2be, simplify set_task_cpu()\n\nEffectively reverts 738d2be4301007f054541c5c4bf7fb6a361c9b3a.\n\nAs demonstrated by Eric, we really need to call __set_task_cpu()\nearly in the fork() path to properly initialize the various task\nstate -- specifically the cgroup state through set_task_rq().\n\n[ we could probably fix this by explicitly calling\n  __set_task_cpu() from   sched_fork(), but lets try that for the\n  next cycle and simply revert to the old behaviour for now. ]\n\nReported-by: Eric Paris \u003ceparis@redhat.com\u003e\nTested-by: Eric Paris \u003ceparis@redhat.com\u003e,\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: efault@gmx.de\nLKML-Reference: \u003c1261492999.4937.36.camel@laptop\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "70f1120527797adb31c68bdc6f1b45e182c342c7",
      "tree": "d2b5f85f3c0f7c9a162828362d3e5f587df56e20",
      "parents": [
        "3df0fc5b2e9d8092dcaeb5ae0b6753d85c851d66"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "peterz@infradead.org",
        "time": "Sun Dec 20 17:36:27 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sun Dec 20 23:31:23 2009 +0100"
      },
      "message": "sched: Fix hotplug hang\n\nThe hot-unplug kstopmachine usage does a wakeup after\ndeactivating the cpu, hence we cannot use cpu_active()\nhere but must rely on the good olde online.\n\nReported-by: Sachin Sant \u003csachinp@in.ibm.com\u003e\nReported-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nTested-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nLKML-Reference: \u003c1261326987.4314.24.camel@laptop\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "3df0fc5b2e9d8092dcaeb5ae0b6753d85c851d66",
      "tree": "078c78047dd9eca67174955a1d1b622da3fe8da8",
      "parents": [
        "dd59f6c76b265ed2ff18b497d6105a9511b1feb1"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "peterz@infradead.org",
        "time": "Sun Dec 20 14:23:57 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sun Dec 20 19:05:02 2009 +0100"
      },
      "message": "sched: Restore printk sanity\n\nRevert the braindead pr_* crap. (Commit 663997d \"sched: Use\npr_fmt() and pr_\u003clevel\u003e()\")\n\nIt\u0027s dumb and causes stupid \"sched: \" strings all over the place.\n\nSigned-off-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nAcked-by: Mike Galbraith \u003cefault@gmx.de\u003e\nCc: Joe Perches \u003cjoe@perches.com\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLKML-Reference: \u003c1261315437.4314.6.camel@laptop\u003e\n[ i dont mind the pr_*() patterns that much - but Peter dislikes them with a vengence. ]\n[ - v2: remove spurious diffstat from changelog :-/ ]\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "077614ee1e93245a3b9a4e1213659405dbeb0ba6",
      "tree": "246e441967d7973d9e3addc6bade207db86d2575",
      "parents": [
        "e1781538cf5c870ab696e9b8f0a5c498d3900f2f"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Thu Dec 17 13:16:31 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Dec 17 13:22:46 2009 +0100"
      },
      "message": "sched: Fix broken assertion\n\nThere\u0027s a preemption race in the set_task_cpu() debug check in\nthat when we get preempted after setting task-\u003estate we\u0027d still\nbe on the rq proper, but fail the test.\n\nCheck for preempted tasks, since those are always on the RQ.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c20091217121830.137155561@chello.nl\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "234da7bcdc7aaa935846534c3b726dbc79a9cdd5",
      "tree": "a391afd465d6493a9f1bb274c225bab4d303aad0",
      "parents": [
        "416eb39556a03d1c7e52b0791e9052ccd71db241"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Wed Dec 16 20:21:05 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Dec 17 09:46:44 2009 +0100"
      },
      "message": "sched: Teach might_sleep() about preemptible RCU\n\nIn practice, it is harmless to voluntarily sleep in a\nrcu_read_lock() section if we are running under preempt rcu, but\nit is illegal if we build a kernel running non-preemptable rcu.\n\nCurrently, might_sleep() doesn\u0027t notice sleepable operations\nunder rcu_read_lock() sections if we are running under\npreemptable rcu because preempt_count() is left untouched after\nrcu_read_lock() in this case. But we want developers who test\ntheir changes under such config to notice the \"sleeping while\natomic\" issues.\n\nSo we add rcu_read_lock_nesting to prempt_count() in\nmight_sleep() checks.\n\n[ v2: Handle rcu-tiny ]\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nReviewed-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nLKML-Reference: \u003c1260991265-8451-1-git-send-regression-fweisbec@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "416eb39556a03d1c7e52b0791e9052ccd71db241",
      "tree": "66390e3d4f53721bc643d24d96d5da339f4c34f8",
      "parents": [
        "738d2be4301007f054541c5c4bf7fb6a361c9b3a"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Dec 17 06:05:49 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Dec 17 06:05:49 2009 +0100"
      },
      "message": "sched: Make warning less noisy\n\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Mike Galbraith \u003cefault@gmx.de\u003e\nLKML-Reference: \u003c20091216170517.807938893@chello.nl\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "738d2be4301007f054541c5c4bf7fb6a361c9b3a",
      "tree": "6d37c04fa3b35d5fe820ab2df1088ba596fefe38",
      "parents": [
        "88ec22d3edb72b261f8628226cd543589a6d5e1b"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Wed Dec 16 18:04:42 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Dec 16 19:01:59 2009 +0100"
      },
      "message": "sched: Simplify set_task_cpu()\n\nRearrange code a bit now that its a simpler function.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Mike Galbraith \u003cefault@gmx.de\u003e\nLKML-Reference: \u003c20091216170518.269101883@chello.nl\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    }
  ],
  "next": "88ec22d3edb72b261f8628226cd543589a6d5e1b"
}