)]}'
{
  "log": [
    {
      "commit": "affee4b294a0fc97d67c8a77dc080c4dd262a79e",
      "tree": "5b3fd79640ad7940e0abbed193a192d3919f259d",
      "parents": [
        "c34056a3fdde777c079cc8a70785c2602f2586cb"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:12 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:12 2010 +0200"
      },
      "message": "workqueue: reimplement work flushing using linked works\n\nA work is linked to the next one by having WORK_STRUCT_LINKED bit set\nand these links can be chained.  When a linked work is dispatched to a\nworker, all linked works are dispatched to the worker\u0027s newly added\n-\u003escheduled queue and processed back-to-back.\n\nCurrently, as there\u0027s only single worker per cwq, having linked works\ndoesn\u0027t make any visible behavior difference.  This change is to\nprepare for multiple shared workers per cpu.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n"
    },
    {
      "commit": "c34056a3fdde777c079cc8a70785c2602f2586cb",
      "tree": "583cc13af000d1c085b1f951f8975eee78cea54c",
      "parents": [
        "73f53c4aa732eced5fcb1844d3d452c30905f20f"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:11 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:11 2010 +0200"
      },
      "message": "workqueue: introduce worker\n\nSeparate out worker thread related information to struct worker from\nstruct cpu_workqueue_struct and implement helper functions to deal\nwith the new struct worker.  The only change which is visible outside\nis that now workqueue worker are all named \"kworker/CPUID:WORKERID\"\nwhere WORKERID is allocated from per-cpu ida.\n\nThis is in preparation of concurrency managed workqueue where shared\nmultiple workers would be available per cpu.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n"
    },
    {
      "commit": "73f53c4aa732eced5fcb1844d3d452c30905f20f",
      "tree": "6185ebab8337d33de9ca9c3d19fc5217bc4ee6bc",
      "parents": [
        "0f900049cbe2767d47c2a62b54f0e822e1d66840"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:11 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:11 2010 +0200"
      },
      "message": "workqueue: reimplement workqueue flushing using color coded works\n\nReimplement workqueue flushing using color coded works.  wq has the\ncurrent work color which is painted on the works being issued via\ncwqs.  Flushing a workqueue is achieved by advancing the current work\ncolors of cwqs and waiting for all the works which have any of the\nprevious colors to drain.\n\nCurrently there are 16 possible colors, one is reserved for no color\nand 15 colors are useable allowing 14 concurrent flushes.  When color\nspace gets full, flush attempts are batched up and processed together\nwhen color frees up, so even with many concurrent flushers, the new\nimplementation won\u0027t build up huge queue of flushers which has to be\nprocessed one after another.\n\nOnly works which are queued via __queue_work() are colored.  Works\nwhich are directly put on queue using insert_work() use NO_COLOR and\ndon\u0027t participate in workqueue flushing.  Currently only works used\nfor work-specific flush fall in this category.\n\nThis new implementation leaves only cleanup_workqueue_thread() as the\nuser of flush_cpu_workqueue().  Just make its users use\nflush_workqueue() and kthread_stop() directly and kill\ncleanup_workqueue_thread().  As workqueue flushing doesn\u0027t use barrier\nrequest anymore, the comment describing the complex synchronization\naround it in cleanup_workqueue_thread() is removed together with the\nfunction.\n\nThis new implementation is to allow having and sharing multiple\nworkers per cpu.\n\nPlease note that one more bit is reserved for a future work flag by\nthis patch.  This is to avoid shifting bits and updating comments\nlater.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n"
    },
    {
      "commit": "0f900049cbe2767d47c2a62b54f0e822e1d66840",
      "tree": "b7d2ce3e00ef49c038d0641a860b98b4c24fb203",
      "parents": [
        "1537663f5763892cacf1409ac0efef1b4f332d1e"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:11 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:11 2010 +0200"
      },
      "message": "workqueue: update cwq alignement\n\nwork-\u003edata field is used for two purposes.  It points to cwq it\u0027s\nqueued on and the lower bits are used for flags.  Currently, two bits\nare reserved which is always safe as 4 byte alignment is guaranteed on\nevery architecture.  However, future changes will need more flag bits.\n\nOn SMP, the percpu allocator is capable of honoring larger alignment\n(there are other users which depend on it) and larger alignment works\njust fine.  On UP, percpu allocator is a thin wrapper around\nkzalloc/kfree() and don\u0027t honor alignment request.\n\nThis patch introduces WORK_STRUCT_FLAG_BITS and implements\nalloc/free_cwqs() which guarantees max(1 \u003c\u003c WORK_STRUCT_FLAG_BITS,\n__alignof__(unsigned long long) alignment both on SMP and UP.  On SMP,\nsimply wrapping percpu allocator is enough.  On UP, extra space is\nallocated so that cwq can be aligned and the original pointer can be\nstored after it which is used in the free path.\n\n* Alignment problem on UP is reported by Michal Simek.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nReported-by: Michal Simek \u003cmichal.simek@petalogix.com\u003e\n"
    },
    {
      "commit": "1537663f5763892cacf1409ac0efef1b4f332d1e",
      "tree": "b2fe110d52315438c71b16f14d8a1b043b91deb4",
      "parents": [
        "64166699752006f1a23a9cf7c96ae36654ccfc2c"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:11 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:11 2010 +0200"
      },
      "message": "workqueue: kill cpu_populated_map\n\nWorker management is about to be overhauled.  Simplify things by\nremoving cpu_populated_map, creating workers for all possible cpus and\nmaking single threaded workqueues behave more like multi threaded\nones.\n\nAfter this patch, all cwqs are always initialized, all workqueues are\nlinked on the workqueues list and workers for all possibles cpus\nalways exist.  This also makes CPU hotplug support simpler - checking\n-\u003ecpus_allowed before processing works in worker_thread() and flushing\ncwqs on CPU_POST_DEAD are enough.\n\nWhile at it, make get_cwq() always return the cwq for the specified\ncpu, add target_cwq() for cases where single thread distinction is\nnecessary and drop all direct usage of per_cpu_ptr() on wq-\u003ecpu_wq.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n"
    },
    {
      "commit": "64166699752006f1a23a9cf7c96ae36654ccfc2c",
      "tree": "ef4d825be9526409102bff79ca8bb1dd60aa2443",
      "parents": [
        "a62428c0ae54a39e411251e836c3fe3dc11a5f5f"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:11 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:11 2010 +0200"
      },
      "message": "workqueue: temporarily remove workqueue tracing\n\nStrip tracing code from workqueue and remove workqueue tracing.  This\nis temporary measure till concurrency managed workqueue is complete.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\n"
    },
    {
      "commit": "a62428c0ae54a39e411251e836c3fe3dc11a5f5f",
      "tree": "364b1f65ac8c54d852a7863eebdf2a8d8dbde6f9",
      "parents": [
        "22df02bb3fab24af97bff4c69cc6fd8529fc66fe"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:10 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:10 2010 +0200"
      },
      "message": "workqueue: separate out process_one_work()\n\nSeparate out process_one_work() out of run_workqueue().  This patch\ndoesn\u0027t cause any behavior change.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n"
    },
    {
      "commit": "22df02bb3fab24af97bff4c69cc6fd8529fc66fe",
      "tree": "125b00589e5abe4dc941a1dba467cd50563ad195",
      "parents": [
        "97e37d7b9e65a6ac939f796f91081135b7a08acc"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:10 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:10 2010 +0200"
      },
      "message": "workqueue: define masks for work flags and conditionalize STATIC flags\n\nWork flags are about to see more traditional mask handling.  Define\nWORK_STRUCT_*_BIT as the bit position constant and redefine\nWORK_STRUCT_* as bit masks.  Also, make WORK_STRUCT_STATIC_* flags\nconditional\n\nWhile at it, re-define these constants as enums and use\nWORK_STRUCT_STATIC instead of hard-coding 2 in\nWORK_DATA_STATIC_INIT().\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n"
    },
    {
      "commit": "97e37d7b9e65a6ac939f796f91081135b7a08acc",
      "tree": "1125644ee13ecf0825688502aa4a7495008cc88e",
      "parents": [
        "4690c4ab56c71919893ca25252f2dd65b58188c7"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:10 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:10 2010 +0200"
      },
      "message": "workqueue: merge feature parameters into flags\n\nCurrently, __create_workqueue_key() takes @singlethread and\n@freezeable paramters and store them separately in workqueue_struct.\nMerge them into a single flags parameter and field and use\nWQ_FREEZEABLE and WQ_SINGLE_THREAD.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n"
    },
    {
      "commit": "4690c4ab56c71919893ca25252f2dd65b58188c7",
      "tree": "dcdb5b7dd2104db2dc8babe66064dd6f5022247f",
      "parents": [
        "c790bce0481857412c964c5e9d46d56e41c4b051"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:10 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:10 2010 +0200"
      },
      "message": "workqueue: misc/cosmetic updates\n\nMake the following updates in preparation of concurrency managed\nworkqueue.  None of these changes causes any visible behavior\ndifference.\n\n* Add comments and adjust indentations to data structures and several\n  functions.\n\n* Rename wq_per_cpu() to get_cwq() and swap the position of two\n  parameters for consistency.  Convert a direct per_cpu_ptr() access\n  to wq-\u003ecpu_wq to get_cwq().\n\n* Add work_static() and Update set_wq_data() such that it sets the\n  flags part to WORK_STRUCT_PENDING | WORK_STRUCT_STATIC if static |\n  @extra_flags.\n\n* Move santiy check on work-\u003eentry emptiness from queue_work_on() to\n  __queue_work() which all queueing paths share.\n\n* Make __queue_work() take @cpu and @wq instead of @cwq.\n\n* Restructure flush_work() and __create_workqueue_key() to make them\n  easier to modify.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n"
    },
    {
      "commit": "c790bce0481857412c964c5e9d46d56e41c4b051",
      "tree": "82e87167b78bbf3456a53d057b1b741c250a0b76",
      "parents": [
        "8fec62b2d9d0c80b594d0d85678bfdf57a70df1b"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:09 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:09 2010 +0200"
      },
      "message": "workqueue: kill RT workqueue\n\nWith stop_machine() converted to use cpu_stop, RT workqueue doesn\u0027t\nhave any user left.  Kill RT workqueue support.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n"
    },
    {
      "commit": "82805ab77d25643f579d90397dcd34f05d1b750a",
      "tree": "4e5fd250d8625e032250fd02101c3b6ce595cbbf",
      "parents": [
        "7bc465605ffa90b281d6b774fcb13911636a6d45"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:09 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:09 2010 +0200"
      },
      "message": "kthread: implement kthread_data()\n\nImplement kthread_data() which takes @task pointing to a kthread and\nreturns @data specified when creating the kthread.  The caller is\nresponsible for ensuring the validity of @task when calling this\nfunction.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n"
    },
    {
      "commit": "b56c0d8937e665a27d90517ee7a746d0aa05af46",
      "tree": "fefff33fe3bbebfc8d60ba581e5343dc6cb56a70",
      "parents": [
        "53c5f5ba42c194cb13dd3083ed425f2c5b1ec439"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:09 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 29 10:07:09 2010 +0200"
      },
      "message": "kthread: implement kthread_worker\n\nImplement simple work processor for kthread.  This is to ease using\nkthread.  Single thread workqueue used to be used for things like this\nbut workqueue won\u0027t guarantee fixed kthread association anymore to\nenable worker sharing.\n\nThis can be used in cases where specific kthread association is\nnecessary, for example, when it should have RT priority or be assigned\nto certain cgroup.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\n"
    },
    {
      "commit": "53c5f5ba42c194cb13dd3083ed425f2c5b1ec439",
      "tree": "72aea970204f3cbf8bd159a8936b36fc61b55718",
      "parents": [
        "7e27d6e778cd87b6f2415515d7127eba53fe5d02",
        "21aa9af03d06cb1d19a3738e5cf12acff984e69b"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Sun Jun 13 18:19:48 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Sun Jun 13 18:19:48 2010 +0200"
      },
      "message": "Merge branch \u0027sched-wq\u0027 of ../wq into cmwq-base\n"
    },
    {
      "commit": "85ca7886f566ae387a57a37bc0ffab25e3e117b5",
      "tree": "d170966b3352b3463669492648861795aad0fb92",
      "parents": [
        "7c8d20d40f29e7c08332d406d7a65678dece4627",
        "16106822b67e0a5eb228aebf47e33d6cad1e91b6"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Jun 10 09:30:09 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Jun 10 09:30:09 2010 -0700"
      },
      "message": "Merge branch \u0027perf-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027perf-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n  tracing: Fix null pointer deref with SEND_SIG_FORCED\n  perf: Fix signed comparison in perf_adjust_period()\n  powerpc/oprofile: fix potential buffer overrun in op_model_cell.c\n  perf symbols: Set the DSO long name when using symbol_conf.vmlinux_name\n"
    },
    {
      "commit": "21aa9af03d06cb1d19a3738e5cf12acff984e69b",
      "tree": "e205a742a4a9baf098b4e3d428c04f4d3a065bca",
      "parents": [
        "9ed3811a6c0d6b66e6cd47a5d7b9136386dce743"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 08 21:40:37 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 08 21:40:37 2010 +0200"
      },
      "message": "sched: add hooks for workqueue\n\nConcurrency managed workqueue needs to know when workers are going to\nsleep and waking up.  Using these two hooks, cmwq keeps track of the\ncurrent concurrency level and throttles execution of new works if it\u0027s\ntoo high and wakes up another worker from the sleep hook if it becomes\ntoo low.\n\nThis patch introduces PF_WQ_WORKER to identify workqueue workers and\nadds the following two hooks.\n\n* wq_worker_waking_up(): called when a worker is woken up.\n\n* wq_worker_sleeping(): called when a worker is going to sleep and may\n  return a pointer to a local task which should be woken up.  The\n  returned task is woken up using try_to_wake_up_local() which is\n  simplified ttwu which is called under rq lock and can only wake up\n  local tasks.\n\nBoth hooks are currently defined as noop in kernel/workqueue_sched.h.\nLater cmwq implementation will replace them with proper\nimplementation.\n\nThese hooks are hard coded as they\u0027ll always be enabled.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nAcked-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Mike Galbraith \u003cefault@gmx.de\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "9ed3811a6c0d6b66e6cd47a5d7b9136386dce743",
      "tree": "6a1e92b3e51978c7e32f1afdf98b1966a3d65818",
      "parents": [
        "3a101d0548e925ab16ca6aaa8cf4f767d322ddb0"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Thu Dec 03 15:08:03 2009 +0900"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 08 21:40:36 2010 +0200"
      },
      "message": "sched: refactor try_to_wake_up()\n\nFactor ttwu_activate() and ttwu_woken_up() out of try_to_wake_up().\nThe factoring out doesn\u0027t affect try_to_wake_up() much\ncode-generation-wise.  Depending on configuration options, it ends up\ngenerating the same object code as before or slightly different one\ndue to different register assignment.\n\nThis is to help future implementation of try_to_wake_up_local().\n\nMike Galbraith suggested rename to ttwu_post_activation() from\nttwu_woken_up() and comment update in try_to_wake_up().\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nAcked-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Mike Galbraith \u003cefault@gmx.de\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "3a101d0548e925ab16ca6aaa8cf4f767d322ddb0",
      "tree": "b90d8c5f2efe30fcfa49a00fdea037567c6cd46f",
      "parents": [
        "50a323b73069b169385a8ac65633dee837a7d13f"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 08 21:40:36 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 08 21:40:36 2010 +0200"
      },
      "message": "sched: adjust when cpu_active and cpuset configurations are updated during cpu on/offlining\n\nCurrently, when a cpu goes down, cpu_active is cleared before\nCPU_DOWN_PREPARE starts and cpuset configuration is updated from a\ndefault priority cpu notifier.  When a cpu is coming up, it\u0027s set\nbefore CPU_ONLINE but cpuset configuration again is updated from the\nsame cpu notifier.\n\nFor cpu notifiers, this presents an inconsistent state.  Threads which\na CPU_DOWN_PREPARE notifier expects to be bound to the CPU can be\nmigrated to other cpus because the cpu is no more inactive.\n\nFix it by updating cpu_active in the highest priority cpu notifier and\ncpuset configuration in the second highest when a cpu is coming up.\nDown path is updated similarly.  This guarantees that all other cpu\nnotifiers see consistent cpu_active and cpuset configuration.\n\ncpuset_track_online_cpus() notifier is converted to\ncpuset_update_active_cpus() which just updates the configuration and\nnow called from cpuset_cpu_[in]active() notifiers registered from\nsched_init_smp().  If cpuset is disabled, cpuset_update_active_cpus()\ndegenerates into partition_sched_domains() making separate notifier\nfor !CONFIG_CPUSETS unnecessary.\n\nThis problem is triggered by cmwq.  During CPU_DOWN_PREPARE, hotplug\ncallback creates a kthread and kthread_bind()s it to the target cpu,\nand the thread is expected to run on that cpu.\n\n* Ingo\u0027s test discovered __cpuinit/exit markups were incorrect.\n  Fixed.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\n"
    },
    {
      "commit": "50a323b73069b169385a8ac65633dee837a7d13f",
      "tree": "020820efb3af12486981381a1e087c1907fdeeb8",
      "parents": [
        "3975d16760d4be7402d1067c548c30c427971331"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 08 21:40:36 2010 +0200"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Jun 08 21:40:36 2010 +0200"
      },
      "message": "sched: define and use CPU_PRI_* enums for cpu notifier priorities\n\nInstead of hardcoding priority 10 and 20 in sched and perf, collect\nthem into CPU_PRI_* enums.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\n"
    },
    {
      "commit": "f6ab91add6355e231e1c47897027b2a6ee4fa268",
      "tree": "74dffdf3b78c290d38a78b73788dce64e4c1e857",
      "parents": [
        "58cc1a9e3b11a84e66c4d3a4cc9073f2cb0ecabb"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Fri Jun 04 15:18:01 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Jun 08 18:43:00 2010 +0200"
      },
      "message": "perf: Fix signed comparison in perf_adjust_period()\n\nFrederic reported that frequency driven swevents didn\u0027t work properly\nand even caused a division-by-zero error.\n\nIt turns out there are two bugs, the division-by-zero comes from a\nfailure to deal with that in perf_calculate_period().\n\nThe other was more interesting and turned out to be a wrong comparison\nin perf_adjust_period(). The comparison was between an s64 and u64 and\ngot implicitly converted to an unsigned comparison. The problem is\nthat period_left is typically \u003c 0, so it ended up being always true.\n\nCure this by making the local period variables s64.\n\nReported-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nTested-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: \u003cstable@kernel.org\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "90ec7819737d42a0ad1c2df1ff56016facae3c6e",
      "tree": "0dac92b38de5cb13764b5f3de33346359928deda",
      "parents": [
        "8ce655e737dc395e115ecdce143a43b9b6127f46",
        "9bea7f23952d5948f8e5dfdff4de09bb9981fb5f"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Jun 04 21:09:48 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Jun 04 21:09:48 2010 -0700"
      },
      "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:\n  module: fix bne2 \"gave up waiting for init of module libcrc32c\"\n  module: verify_export_symbols under the lock\n  module: move find_module check to end\n  module: make locking more fine-grained.\n  module: Make module sysfs functions private.\n  module: move sysfs exposure to end of load_module\n  module: fix kdb\u0027s illicit use of struct module_use.\n  module: Make the \u0027usage\u0027 lists be two-way\n"
    },
    {
      "commit": "9bea7f23952d5948f8e5dfdff4de09bb9981fb5f",
      "tree": "9cb7231bcf901fe4198142b9b054ce5ae6ce34c8",
      "parents": [
        "be593f4ce4eb1bd40e38fdc403371f149f6f12eb"
      ],
      "author": {
        "name": "Rusty Russell",
        "email": "rusty@rustcorp.com.au",
        "time": "Sat Jun 05 11:17:37 2010 -0600"
      },
      "committer": {
        "name": "Rusty Russell",
        "email": "rusty@rustcorp.com.au",
        "time": "Sat Jun 05 11:17:37 2010 +0930"
      },
      "message": "module: fix bne2 \"gave up waiting for init of module libcrc32c\"\n\nProblem: it\u0027s hard to avoid an init routine stumbling over a\nrequest_module these days.  And it\u0027s not clear it\u0027s always a bad idea:\nfor example, a module like kvm with dynamic dependencies on kvm-intel\nor kvm-amd would be neater if it could simply request_module the right\none.\n\nIn this particular case, it\u0027s libcrc32c:\n\n\tlibcrc32c_mod_init\n\t crypto_alloc_shash\n\t  crypto_alloc_tfm\n\t   crypto_find_alg\n\t    crypto_alg_mod_lookup\n\t     crypto_larval_lookup\n\t      request_module\n\nIf another module is waiting inside resolve_symbol() for libcrc32c to\nfinish initializing (ie. bne2 depends on libcrc32c) then it does so\nholding the module lock, and our request_module() can\u0027t make progress\nuntil that is released.\n\nWaiting inside resolve_symbol() without the lock isn\u0027t all that hard:\nwe just need to pass the -EBUSY up the call chain so we can sleep\nwhere we don\u0027t hold the lock.  Error reporting is a bit trickier: we\nneed to copy the name of the unfinished module before releasing the\nlock.\n\nOther notes:\n1) This also fixes a theoretical issue where a weak dependency would allow\n   symbol version mismatches to be ignored.\n2) We rename use_module to ref_module to make life easier for the only\n   external user (the out-of-tree ksplice patches).\n\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Tim Abbot \u003ctabbott@ksplice.com\u003e\nTested-by: Brandon Philips \u003cbphilips@suse.de\u003e\n"
    },
    {
      "commit": "be593f4ce4eb1bd40e38fdc403371f149f6f12eb",
      "tree": "693aee53e2d87a8ae92b6276d2aef766e8154814",
      "parents": [
        "3bafeb6247042dcbb72b0141ec7c7107de9f0b99"
      ],
      "author": {
        "name": "Rusty Russell",
        "email": "rusty@rustcorp.com.au",
        "time": "Sat Jun 05 11:17:37 2010 -0600"
      },
      "committer": {
        "name": "Rusty Russell",
        "email": "rusty@rustcorp.com.au",
        "time": "Sat Jun 05 11:17:37 2010 +0930"
      },
      "message": "module: verify_export_symbols under the lock\n\nIt disabled preempt so it was \"safe\", but nothing stops another module\nslipping in before this module is added to the global list now we don\u0027t\nhold the lock the whole time.\n\nSo we check this just after we check for duplicate modules, and just\nbefore we put the module in the global list.\n\n(find_symbol finds symbols in coming and going modules, too).\n\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\n"
    },
    {
      "commit": "3bafeb6247042dcbb72b0141ec7c7107de9f0b99",
      "tree": "f9b8f2437455332cd64d94bedb0836ac0f2b6fd9",
      "parents": [
        "75676500f8298f0ee89db12db97294883c4b768e"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jun 05 11:17:36 2010 -0600"
      },
      "committer": {
        "name": "Rusty Russell",
        "email": "rusty@rustcorp.com.au",
        "time": "Sat Jun 05 11:17:37 2010 +0930"
      },
      "message": "module: move find_module check to end\n\nI think Rusty may have made the lock a bit _too_ finegrained there, and\ndidn\u0027t add it to some places that needed it. It looks, for example, like\nPATCH 1/2 actually drops the lock in places where it\u0027s needed\n(\"find_module()\" is documented to need it, but now load_module() didn\u0027t\nhold it at all when it did the find_module()).\n\nRather than adding a new \"module_loading\" list, I think we should be able\nto just use the existing \"modules\" list, and just fix up the locking a\nbit.\n\nIn fact, maybe we could just move the \"look up existing module\" a bit\nlater - optimistically assuming that the module doesn\u0027t exist, and then\njust undoing the work if it turns out that we were wrong, just before\nadding ourselves to the list.\n\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\n"
    },
    {
      "commit": "75676500f8298f0ee89db12db97294883c4b768e",
      "tree": "fbd74f1b6bfd258fac980c6cc3d4fa9eafa47d51",
      "parents": [
        "6407ebb271fc34440b306f305e1efb7685eece26"
      ],
      "author": {
        "name": "Rusty Russell",
        "email": "rusty@rustcorp.com.au",
        "time": "Sat Jun 05 11:17:36 2010 -0600"
      },
      "committer": {
        "name": "Rusty Russell",
        "email": "rusty@rustcorp.com.au",
        "time": "Sat Jun 05 11:17:36 2010 +0930"
      },
      "message": "module: make locking more fine-grained.\n\nKay Sievers \u003ckay.sievers@vrfy.org\u003e reports that we still have some\ncontention over module loading which is slowing boot.\n\nLinus also disliked a previous \"drop lock and regrab\" patch to fix the\nbne2 \"gave up waiting for init of module libcrc32c\" message.\n\nThis is more ambitious: we only grab the lock where we need it.\n\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nCc: Brandon Philips \u003cbrandon@ifup.org\u003e\nCc: Kay Sievers \u003ckay.sievers@vrfy.org\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "6407ebb271fc34440b306f305e1efb7685eece26",
      "tree": "dd3fa7484bcaa4499138d2249dbed24f003fdf85",
      "parents": [
        "80a3d1bb410e000e176931a076cdf19a1e89a955"
      ],
      "author": {
        "name": "Rusty Russell",
        "email": "rusty@rustcorp.com.au",
        "time": "Sat Jun 05 11:17:36 2010 -0600"
      },
      "committer": {
        "name": "Rusty Russell",
        "email": "rusty@rustcorp.com.au",
        "time": "Sat Jun 05 11:17:36 2010 +0930"
      },
      "message": "module: Make module sysfs functions private.\n\nThese were placed in the header in ef665c1a06 to get the various\nSYSFS/MODULE config combintations to compile.\n\nThat may have been necessary then, but it\u0027s not now.  These functions\nare all local to module.c.\n\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nCc: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\n"
    },
    {
      "commit": "80a3d1bb410e000e176931a076cdf19a1e89a955",
      "tree": "6883bbc3b2032d9604374513ccfd496dd63e76ba",
      "parents": [
        "c8e21ced08b39ef8dfe7236fb2a923a95f645262"
      ],
      "author": {
        "name": "Rusty Russell",
        "email": "rusty@rustcorp.com.au",
        "time": "Sat Jun 05 11:17:36 2010 -0600"
      },
      "committer": {
        "name": "Rusty Russell",
        "email": "rusty@rustcorp.com.au",
        "time": "Sat Jun 05 11:17:36 2010 +0930"
      },
      "message": "module: move sysfs exposure to end of load_module\n\nThis means a little extra work, but is more logical: we don\u0027t put\nanything in sysfs until we\u0027re about to put the module into the\nglobal list an parse its parameters.\n\nThis also gives us a logical place to put duplicate module detection\nin the next patch.\n\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\n"
    },
    {
      "commit": "c8e21ced08b39ef8dfe7236fb2a923a95f645262",
      "tree": "da34400daf3049814b459b9c8ba507d90abfe2bc",
      "parents": [
        "2c02dfe7fe3fba97a5665d329d039d2415ea5607"
      ],
      "author": {
        "name": "Rusty Russell",
        "email": "rusty@rustcorp.com.au",
        "time": "Sat Jun 05 11:17:35 2010 -0600"
      },
      "committer": {
        "name": "Rusty Russell",
        "email": "rusty@rustcorp.com.au",
        "time": "Sat Jun 05 11:17:36 2010 +0930"
      },
      "message": "module: fix kdb\u0027s illicit use of struct module_use.\n\nLinus changed the structure, and luckily this didn\u0027t compile any more.\n\nReported-by: Stephen Rothwell \u003csfr@canb.auug.org.au\u003e\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nCc: Jason Wessel \u003cjason.wessel@windriver.com\u003e\nCc: Martin Hicks \u003cmort@sgi.com\u003e\n"
    },
    {
      "commit": "2c02dfe7fe3fba97a5665d329d039d2415ea5607",
      "tree": "7f50644bbfcc119cb85e21642a76eabfaf77b8ad",
      "parents": [
        "ad8456361fa19068cf49b50a4f98e41b73c08e76"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon May 31 12:19:37 2010 -0700"
      },
      "committer": {
        "name": "Rusty Russell",
        "email": "rusty@rustcorp.com.au",
        "time": "Sat Jun 05 11:17:35 2010 +0930"
      },
      "message": "module: Make the \u0027usage\u0027 lists be two-way\n\nWhen adding a module that depends on another one, we used to create a\none-way list of \"modules_which_use_me\", so that module unloading could\nsee who needs a module.\n\nIt\u0027s actually quite simple to make that list go both ways: so that we\nnot only can see \"who uses me\", but also see a list of modules that are\n\"used by me\".\n\nIn fact, we always wanted that list in \"module_unload_free()\": when we\nunload a module, we want to also release all the other modules that are\nused by that module.  But because we didn\u0027t have that list, we used to\nfirst iterate over all modules, and then iterate over each \"used by me\"\nlist of that module.\n\nBy making the list two-way, we simplify module_unload_free(), and it\nallows for some trivial fixes later too.\n\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e (cleaned \u0026 rebased)\n"
    },
    {
      "commit": "d2dd328b7f7bc6cebe167648289337755944ad2a",
      "tree": "5d664a2db1ac209f7537452ddc02597972f7aa37",
      "parents": [
        "c1518f12bab97a6d409a25aaccb02dc8895800f3",
        "1abec4fdbb142e3ccb6ce99832fae42129134a96"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Jun 04 15:37:44 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Jun 04 15:37:44 2010 -0700"
      },
      "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.dk/linux-2.6-block\n\n* \u0027for-linus\u0027 of git://git.kernel.dk/linux-2.6-block: (27 commits)\n  block: make blk_init_free_list and elevator_init idempotent\n  block: avoid unconditionally freeing previously allocated request_queue\n  pipe: change /proc/sys/fs/pipe-max-pages to byte sized interface\n  pipe: change the privilege required for growing a pipe beyond system max\n  pipe: adjust minimum pipe size to 1 page\n  block: disable preemption before using sched_clock()\n  cciss: call BUG() earlier\n  Preparing 8.3.8rc2\n  drbd: Reduce verbosity\n  drbd: use drbd specific ratelimit instead of global printk_ratelimit\n  drbd: fix hang on local read errors while disconnected\n  drbd: Removed the now empty w_io_error() function\n  drbd: removed duplicated #includes\n  drbd: improve usage of MSG_MORE\n  drbd: need to set socket bufsize early to take effect\n  drbd: improve network latency, TCP_QUICKACK\n  drbd: Revert \"drbd: Create new current UUID as late as possible\"\n  brd: support discard\n  Revert \"writeback: fix WB_SYNC_NONE writeback from umount\"\n  Revert \"writeback: ensure that WB_SYNC_NONE writeback with sb pinned is sync\"\n  ...\n"
    },
    {
      "commit": "9e506f7adce8e6165a104d3d78fddd8ff0cdccf8",
      "tree": "9ddfd67eec7e8a7dc73fb0ced97cc06e54a35c63",
      "parents": [
        "94b3dd0f7bb393d93e84a173b1df9b8b64c83ac4"
      ],
      "author": {
        "name": "Akinobu Mita",
        "email": "akinobu.mita@gmail.com",
        "time": "Fri Jun 04 14:15:04 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Jun 04 15:21:45 2010 -0700"
      },
      "message": "kernel/: fix BUG_ON checks for cpu notifier callbacks direct call\n\nThe commit 80b5184cc537718122e036afe7e62d202b70d077 (\"kernel/: convert cpu\nnotifier to return encapsulate errno value\") changed the return value of\ncpu notifier callbacks.\n\nThose callbacks don\u0027t return NOTIFY_BAD on failures anymore.  But there\nare a few callbacks which are called directly at init time and checking\nthe return value.\n\nI forgot to change BUG_ON checking by the direct callers in the commit.\n\nSigned-off-by: Akinobu Mita \u003cakinobu.mita@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "94b3dd0f7bb393d93e84a173b1df9b8b64c83ac4",
      "tree": "11f49a1614e8321a6b4335f7a5022a487838397d",
      "parents": [
        "007d08678eb87478b65b3f229960c81dd7c7b8f3"
      ],
      "author": {
        "name": "Greg Thelen",
        "email": "gthelen@google.com",
        "time": "Fri Jun 04 14:15:03 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Jun 04 15:21:45 2010 -0700"
      },
      "message": "cgroups: alloc_css_id() increments hierarchy depth\n\nChild groups should have a greater depth than their parents.  Prior to\nthis change, the parent would incorrectly report zero memory usage for\nchild cgroups when use_hierarchy is enabled.\n\ntest script:\n  mount -t cgroup none /cgroups -o memory\n  cd /cgroups\n  mkdir cg1\n\n  echo 1 \u003e cg1/memory.use_hierarchy\n  mkdir cg1/cg11\n\n  echo $$ \u003e cg1/cg11/tasks\n  dd if\u003d/dev/zero of\u003d/tmp/foo bs\u003d1M count\u003d1\n\n  echo\n  echo CHILD\n  grep cache cg1/cg11/memory.stat\n\n  echo\n  echo PARENT\n  grep cache cg1/memory.stat\n\n  echo $$ \u003e tasks\n  rmdir cg1/cg11 cg1\n  cd /\n  umount /cgroups\n\nUsing fae9c79, a recent patch that changed alloc_css_id() depth computation,\nthe parent incorrectly reports zero usage:\n  root@ubuntu:~# ./test\n  1+0 records in\n  1+0 records out\n  1048576 bytes (1.0 MB) copied, 0.0151844 s, 69.1 MB/s\n\n  CHILD\n  cache 1048576\n  total_cache 1048576\n\n  PARENT\n  cache 0\n  total_cache 0\n\nWith this patch, the parent correctly includes child usage:\n  root@ubuntu:~# ./test\n  1+0 records in\n  1+0 records out\n  1048576 bytes (1.0 MB) copied, 0.0136827 s, 76.6 MB/s\n\n  CHILD\n  cache 1052672\n  total_cache 1052672\n\n  PARENT\n  cache 0\n  total_cache 1052672\n\nSigned-off-by: Greg Thelen \u003cgthelen@google.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: \u003cstable@kernel.org\u003e\t\t[2.6.34.x]\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "485d527686850d68a0e9006dd9904f19f122485e",
      "tree": "8400c646135bb4ce68f137004298e1be7fdbd913",
      "parents": [
        "d6d03f9158516b50d0d343158e3f33bcff1e4ca5"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Fri Jun 04 14:14:58 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Jun 04 15:21:45 2010 -0700"
      },
      "message": "sys_personality: change sys_personality() to accept \"unsigned int\" instead of u_long\n\ntask_struct-\u003epesonality is \"unsigned int\", but sys_personality() paths use\n\"unsigned long pesonality\".  This means that every assignment or\ncomparison is not right.  In particular, if this argument does not fit\ninto \"unsigned int\" __set_personality() changes the caller\u0027s personality\nand then sys_personality() returns -EINVAL.\n\nTurn this argument into \"unsigned int\" and avoid overflows.  Obviously,\nthis is the user-visible change, we just ignore the upper bits.  But this\ncan\u0027t break the sane application.\n\nThere is another thing which can confuse the poorly written applications.\nUser-space thinks that this syscall returns int, not long.  This means\nthat the returned value can be negative and look like the error code.  But\nnote that libc won\u0027t be confused and thus errno won\u0027t be set, and with\nthis patch the user-space can never get -1 unless sys_personality() really\nfails.  And, most importantly, the negative RET !\u003d -1 is only possible if\nthat app previously called personality(RET).\n\nPointed-out-by: Wenming Zhang \u003cwezhang@redhat.com\u003e\nSuggested-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: \"H. Peter Anvin\" \u003chpa@zytor.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "39d112100e561686ab1e2b19c57984163ad6c1fa",
      "tree": "19b3cd50345306de6f95b58b4a35e8f725786b9b",
      "parents": [
        "167b7129042a4b4c09bb4ede5482ff79340a3999",
        "02f726949f2be0967aa4871dd4e47d3967779b26"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Jun 03 15:47:51 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Jun 03 15:47:51 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, trace: Fix sched_switch() prev_state argument\n  sched: Fix wake_affine() vs RT tasks\n  sched: Make sure timers have migrated before killing the migration_thread\n"
    },
    {
      "commit": "f150dba6d4a1e275b62ca76572c2786c71b91e85",
      "tree": "1fb8ed0a64f69431e8a3304a1b346a19979028b9",
      "parents": [
        "636667a545b2d16797f27002a65d688c195c9b60",
        "c6df8d5ab87a246942d138321e1721edbb69f6e1"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Jun 03 15:45:26 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Jun 03 15:45:26 2010 -0700"
      },
      "message": "Merge branch \u0027perf-fixes-for-linus-2\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027perf-fixes-for-linus-2\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n  perf: Fix crash in swevents\n  perf buildid-list: Fix --with-hits event processing\n  perf scripts python: Give field dict to unhandled callback\n  perf hist: fix objdump output parsing\n  perf-record: Check correct pid when forking\n  perf: Do the comm inheritance per thread in event__process_task\n  perf: Use event__process_task from perf sched\n  perf: Process comm events by tid\n  blktrace: Fix new kernel-doc warnings\n  perf_events: Fix unincremented buffer base on partial copy\n  perf_events: Fix event scheduling issues introduced by transactional API\n  perf_events, trace: Fix perf_trace_destroy(), mutex went missing\n  perf_events, trace: Fix probe unregister race\n  perf_events: Fix races in group composition\n  perf_events: Fix races and clean up perf_event and perf_mmap_data interaction\n"
    },
    {
      "commit": "c6df8d5ab87a246942d138321e1721edbb69f6e1",
      "tree": "4fa2965d148c3e7ea456ab889d278d5c16d25d17",
      "parents": [
        "da3fd1a0010ccc9fe6fd5ae2b9e85e1aacc03e4d"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Thu Jun 03 11:21:20 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Jun 03 17:03:08 2010 +0200"
      },
      "message": "perf: Fix crash in swevents\n\nFrederic reported that because swevents handling doesn\u0027t disable IRQs\nanymore, we can get a recursion of perf_adjust_period(), once from\noverflow handling and once from the tick.\n\nIf both call -\u003edisable, we get a double hlist_del_rcu() and trigger\na LIST_POISON2 dereference.\n\nSince we don\u0027t actually need to stop/start a swevent to re-programm\nthe hardware (lack of hardware to program), simply nop out these\ncallbacks for the swevent pmu.\n\nReported-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1275557609.27810.35218.camel@twins\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "ff9da691c0498ff81fdd014e7a0731dab2337dac",
      "tree": "429dc9ea36c9927954ed3a32f03d28730e693c8b",
      "parents": [
        "419f8367ea37e5adc5d95479e8fd5554b92b49fe"
      ],
      "author": {
        "name": "Jens Axboe",
        "email": "jaxboe@fusionio.com",
        "time": "Thu Jun 03 14:54:39 2010 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jaxboe@fusionio.com",
        "time": "Thu Jun 03 14:54:39 2010 +0200"
      },
      "message": "pipe: change /proc/sys/fs/pipe-max-pages to byte sized interface\n\nThis changes the interface to be based on bytes instead. The API\nmatches that of F_SETPIPE_SZ in that it rounds up the passed in\nsize so that the resulting page array is a power-of-2 in size.\n\nThe proc file is renamed to /proc/sys/fs/pipe-max-size to\nreflect this change.\n\nSigned-off-by: Jens Axboe \u003cjaxboe@fusionio.com\u003e\n"
    },
    {
      "commit": "5c113fbeed7a5a192d8431a768965f8a45c16475",
      "tree": "af33ad559690221cc1b015c50ff804fd51c5da2b",
      "parents": [
        "1f73897861b8ef0be64ff4b801f8d6f830f683b5"
      ],
      "author": {
        "name": "Daniel J Blueman",
        "email": "daniel.blueman@gmail.com",
        "time": "Tue Jun 01 12:15:11 2010 +0100"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Jun 01 09:22:50 2010 -0700"
      },
      "message": "fix cpu_chain section mismatch...\n\nIn commit e9fb7631ebcd (\"cpu-hotplug: introduce cpu_notify(),\n__cpu_notify(), cpu_notify_nofail()\") the new helper functions access\ncpu_chain.  As a result, it shouldn\u0027t be marked __cpuinitdata (via\nsection mismatch warning).\n\nAlternatively, the helper functions should be forced inline, or marked\n__ref or __cpuinit.  In the meantime, this patch silences the warning\nthe trivial way.\n\nSigned-off-by: Daniel J Blueman \u003cdaniel.blueman@gmail.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "1f73897861b8ef0be64ff4b801f8d6f830f683b5",
      "tree": "b4bae8f12e1422113910d8cb00a19d010dc4a52f",
      "parents": [
        "b904d7131d116900524bd36ec170dcd97846bfd3",
        "64ffc9ff424c65adcffe7d590018cc75e2d5d42a"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Jun 01 08:55:52 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Jun 01 08:55:52 2010 -0700"
      },
      "message": "Merge branch \u0027for-35\u0027 of git://repo.or.cz/linux-kbuild\n\n* \u0027for-35\u0027 of git://repo.or.cz/linux-kbuild: (81 commits)\n  kbuild: Revert part of e8d400a to resolve a conflict\n  kbuild: Fix checking of scm-identifier variable\n  gconfig: add support to show hidden options that have prompts\n  menuconfig: add support to show hidden options which have prompts\n  gconfig: remove show_debug option\n  gconfig: remove dbg_print_ptype() and dbg_print_stype()\n  kconfig: fix zconfdump()\n  kconfig: some small fixes\n  add random binaries to .gitignore\n  kbuild: Include gen_initramfs_list.sh and the file list in the .d file\n  kconfig: recalc symbol value before showing search results\n  .gitignore: ignore *.lzo files\n  headerdep: perlcritic warning\n  scripts/Makefile.lib: Align the output of LZO\n  kbuild: Generate modules.builtin in make modules_install\n  Revert \"kbuild: specify absolute paths for cscope\"\n  kbuild: Do not unnecessarily regenerate modules.builtin\n  headers_install: use local file handles\n  headers_check: fix perl warnings\n  export_report: fix perl warnings\n  ...\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": "293a7cfeedc2b2380a7c7274902323c3cf5f7575",
      "tree": "00576870400cb640fe92ea3f525338e6e3733a2e",
      "parents": [
        "67a3e12b05e055c0415c556a315a3d3eb637e29e"
      ],
      "author": {
        "name": "Rusty Russell",
        "email": "rusty@rustcorp.com.au",
        "time": "Mon May 31 19:53:50 2010 +0930"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon May 31 11:21:32 2010 -0700"
      },
      "message": "module: fix reference to mod-\u003epercpu after freeing module.\n\nRafael sees a sometimes crash at precpu_modfree from kernel/module.c; it\nonly occurred with another (since-reverted) patch, but that patch simply\nchanged timing to uncover this bug, it was otherwise unrelated.\n\nThe comment about the mod being freed is self-explanatory, but neither\nTejun nor I read it.  This bug was introduced in 259354deaa, after it\nhad previously been fixed in 6e2b75740b.  How embarrassing.\n\nReported-by: \"Rafael J. Wysocki\" \u003crjw@sisk.pl\u003e\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nEmbarrassingly-Acked-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Masami Hiramatsu \u003cmhiramat@redhat.com\u003e\nTested-by: \"Rafael J. Wysocki\" \u003crjw@sisk.pl\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "546cf44a1b507c1cbb5cf42bbe6169780567f36f",
      "tree": "ab0373b82198dcae5870fa2af1916102894069f1",
      "parents": [
        "74048f895fa8cbf8119b4999f1f44881a825f954"
      ],
      "author": {
        "name": "Randy Dunlap",
        "email": "randy.dunlap@oracle.com",
        "time": "Sat May 29 11:45:07 2010 -0700"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon May 31 09:58:20 2010 +0200"
      },
      "message": "blktrace: Fix new kernel-doc warnings\n\nFix blktrace.c kernel-doc warnings:\n Warning(kernel/trace/blktrace.c:858): No description found for parameter \u0027ignore\u0027\n Warning(kernel/trace/blktrace.c:890): No description found for parameter \u0027ignore\u0027\n\nSigned-off-by: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nCc: Jens Axboe \u003cjens.axboe@oracle.com\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nLKML-Reference: \u003c20100529114507.c466fc1e.randy.dunlap@oracle.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "74048f895fa8cbf8119b4999f1f44881a825f954",
      "tree": "16c38467e68c730d459dd64cee7f749f1745c782",
      "parents": [
        "90151c35b19633e0cab5a6c80f1ba4a51e7c913b"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Thu May 27 21:34:58 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon May 31 08:46:10 2010 +0200"
      },
      "message": "perf_events: Fix unincremented buffer base on partial copy\n\nIf a sample size crosses to the next page boundary, the copy\nwill be made in more than one step. However we forget to advance\nthe source offset for the next copy, leading to unexpected double\ncopies that completely mess up the traces.\n\nThis fixes various kinds of bad traces that have irrelevant\ndata inside, as an example:\n\n\tgeany-4979  [001]  5758.077775: sched_switch: prev_comm\u003d! prev_pid\u003d121\n\t\tprev_prio\u003d0 prev_state\u003dS|D|Z|X|x \u003d\u003d\u003e next_comm\u003d next_pid\u003d7497072\n\t\tnext_prio\u003d0\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1274988898-5639-1-git-send-regression-fweisbec@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "90151c35b19633e0cab5a6c80f1ba4a51e7c913b",
      "tree": "448c86520eef5b9dc0f06c59a8a96abfd4096fab",
      "parents": [
        "2e97942fe57864588774f173cf4cd7bb68968b76"
      ],
      "author": {
        "name": "Stephane Eranian",
        "email": "eranian@google.com",
        "time": "Tue May 25 16:23:10 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon May 31 08:46:10 2010 +0200"
      },
      "message": "perf_events: Fix event scheduling issues introduced by transactional API\n\nThe transactional API patch between the generic and model-specific\ncode introduced several important bugs with event scheduling, at\nleast on X86. If you had pinned events, e.g., watchdog,  and were\nover-committing the PMU, you would get bogus counts. The bug was\nshowing up on Intel CPU because events would move around more\noften that on AMD. But the problem also existed on AMD, though\nharder to expose.\n\nThe issues were:\n\n - group_sched_in() was missing a cancel_txn() in the error path\n\n - cpuc-\u003en_added was not properly maintained, leading to missing\n   actions in hw_perf_enable(), i.e., n_running being 0. You cannot\n   update n_added until you know the transaction has succeeded. In\n   case of failed transaction n_added was not adjusted back.\n\n - in case of failed transactions, event_sched_out() was called\n   and eventually invoked x86_disable_event() to touch the HW reg.\n   But with transactions, on X86, event_sched_in() does not touch\n   HW registers, it simply collects events into a list. Thus, you\n   could end up calling x86_disable_event() on a counter which\n   did not correspond to the current event when idx !\u003d -1.\n\nThe patch modifies the generic and X86 code to avoid all those problems.\n\nFirst, we keep track of the number of events added last. In case the\ntransaction fails, we substract them from n_added. This approach is\nnecessary (as opposed to delaying updates to n_added) because not all\nevent updates use the transaction API, e.g., single events.\n\nSecond, we encapsulate the event_sched_in() and event_sched_out() in\ngroup_sched_in() inside the transaction. That makes the operations\nsymmetrical and you can also detect that you are inside a transaction\nand skip the HW reg access by checking cpuc-\u003egroup_flag.\n\nWith this patch, you can now overcommit the PMU even with pinned\nsystem-wide events present and still get valid counts.\n\nSigned-off-by: Stephane Eranian \u003ceranian@google.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1274796225.5882.1389.camel@twins\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "2e97942fe57864588774f173cf4cd7bb68968b76",
      "tree": "bf0eeda8c13a6e851ad755b7114ceaa82c51fd97",
      "parents": [
        "3771f0771154675d4a0ca780be2411f3cc357208"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Fri May 21 16:22:33 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon May 31 08:46:09 2010 +0200"
      },
      "message": "perf_events, trace: Fix perf_trace_destroy(), mutex went missing\n\nSteve spotted I forgot to do the destroy under event_mutex.\n\nReported-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1274451913.1674.1707.camel@laptop\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "3771f0771154675d4a0ca780be2411f3cc357208",
      "tree": "106512f307e2aa0a89f92c01598d5fa75903af47",
      "parents": [
        "8a49542c0554af7d0073aac0ee73ee65b807ef34"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Fri May 21 12:31:09 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon May 31 08:46:09 2010 +0200"
      },
      "message": "perf_events, trace: Fix probe unregister race\n\ntracepoint_probe_unregister() does not synchronize against the probe\ncallbacks, so do that explicitly. This properly serializes the callbacks\nand the free of the data used therein.\n\nAlso, use this_cpu_ptr() where possible.\n\nAcked-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1274438476.1674.1702.camel@laptop\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "8a49542c0554af7d0073aac0ee73ee65b807ef34",
      "tree": "73e82ee5a624012ac723c3af21bb1945b7bd675f",
      "parents": [
        "ac9721f3f54b27a16c7e1afb2481e7ee95a70318"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Thu May 27 15:47:49 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon May 31 08:46:09 2010 +0200"
      },
      "message": "perf_events: Fix races in group composition\n\nGroup siblings don\u0027t pin each-other or the parent, so when we destroy\nevents we must make sure to clean up all cross referencing pointers.\n\nIn particular, for destruction of a group leader we must be able to\nfind all its siblings and remove their reference to it.\n\nThis means that detaching an event from its context must not detach it\nfrom the group, otherwise we can end up failing to clear all pointers.\n\nSolve this by clearly separating the attachment to a context and\nattachment to a group, and keep the group composed until we destroy\nthe events.\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": "ac9721f3f54b27a16c7e1afb2481e7ee95a70318",
      "tree": "a9f21d60c7c4c1910696553a6f8273edcca03c64",
      "parents": [
        "67a3e12b05e055c0415c556a315a3d3eb637e29e"
      ],
      "author": {
        "name": "Peter Zijlstra",
        "email": "a.p.zijlstra@chello.nl",
        "time": "Thu May 27 12:54:41 2010 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon May 31 08:46:08 2010 +0200"
      },
      "message": "perf_events: Fix races and clean up perf_event and perf_mmap_data interaction\n\nIn order to move toward separate buffer objects, rework the whole\nperf_mmap_data construct to be a more self-sufficient entity, one\nwith its own lifetime rules.\n\nThis greatly sanitizes the whole output redirection code, which\nwas riddled with bugs and races.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: \u003cstable@kernel.org\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "54e88fad223c4e1d94289611a90c7fe3ebe5631b",
      "tree": "c9c9f27bf4e1e9851ee75145960607f194b3313b",
      "parents": [
        "67a3e12b05e055c0415c556a315a3d3eb637e29e"
      ],
      "author": {
        "name": "Amit K. Arora",
        "email": "aarora@linux.vnet.ibm.com",
        "time": "Tue May 25 18:53:46 2010 +0530"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon May 31 08:37:44 2010 +0200"
      },
      "message": "sched: Make sure timers have migrated before killing the migration_thread\n\nProblem: In a stress test where some heavy tests were running along with\nregular CPU offlining and onlining, a hang was observed. The system seems\nto be hung at a point where migration_call() tries to kill the\nmigration_thread of the dying CPU, which just got moved to the current\nCPU. This migration thread does not get a chance to run (and die) since\nrt_throttled is set to 1 on current, and it doesn\u0027t get cleared as the\nhrtimer which is supposed to reset the rt bandwidth\n(sched_rt_period_timer) is tied to the CPU which we just marked dead!\n\nSolution: This patch pushes the killing of migration thread to\n\"CPU_POST_DEAD\" event. By then all the timers (including\nsched_rt_period_timer) should have got migrated (along with other\ncallbacks).\n\nSigned-off-by: Amit Arora \u003caarora@in.ibm.com\u003e\nSigned-off-by: Gautham R Shenoy \u003cego@in.ibm.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nLKML-Reference: \u003c20100525132346.GA14986@amitarora.in.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "fa7eadab4b4aec0139d2429e6f8d13375ff8a658",
      "tree": "91b4ef421d415b782ff54cc89296268903fc9552",
      "parents": [
        "bc7d352c5e76c74c628a39b99777a1bdddde5e81",
        "fd6be105b883244127a734ac9f14ae94a022dcc0"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun May 30 12:35:15 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun May 30 12:35:15 2010 -0700"
      },
      "message": "Merge branch \u0027core-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027core-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n  mutex: Fix optimistic spinning vs. BKL\n"
    },
    {
      "commit": "bc7d352c5e76c74c628a39b99777a1bdddde5e81",
      "tree": "3cc0a80defb54d284e2a9a1e69b1224064921775",
      "parents": [
        "b3f2f6cd1ff935ecac9a5346904b899d7af689fe",
        "92af1abde4f2d74c9e5f7b670a1971779ed0b051"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun May 30 12:35:01 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun May 30 12:35:01 2010 -0700"
      },
      "message": "Merge branch \u0027perf-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027perf-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n  perf tui: Fix last use_browser problem related to .perfconfig\n  perf symbols: Add the build id cache to the vmlinux path\n  perf tui: Reset use_browser if stdout is not a tty\n  ring-buffer: Move zeroing out excess in page to ring buffer code\n  ring-buffer: Reset \"real_end\" when page is filled\n"
    },
    {
      "commit": "e9a5f426b85e429bffaee4e0b086b1e742a39fa6",
      "tree": "65ba763309c5d771c1f179af5b36fce996742b1c",
      "parents": [
        "97ef6f7449da6ceddf9a90fa8851f607b67283dd"
      ],
      "author": {
        "name": "Rafael J. Wysocki",
        "email": "rjw@sisk.pl",
        "time": "Thu May 27 22:16:22 2010 +0200"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun May 30 09:06:00 2010 -0700"
      },
      "message": "CPU: Avoid using unititialized error variable in disable_nonboot_cpus()\n\nIf there\u0027s only one CPU online when disable_nonboot_cpus() is called,\nthe error variable will not be initialized and that may lead to\nerroneous behavior.  Fix this issue by initializing error in\ndisable_nonboot_cpus() as appropriate.\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "35926ff5fba8245bd1c6ac04155048f6f89232b1",
      "tree": "9afc520f47e29cb3cd80462fe62858f17b1c6cfb",
      "parents": [
        "b612a0553714c6b9744ad0d03f10cac78f3a84b1"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun May 30 09:00:03 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun May 30 09:00:03 2010 -0700"
      },
      "message": "Revert \"cpusets: randomize node rotor used in cpuset_mem_spread_node()\"\n\nThis reverts commit 0ac0c0d0f837c499afd02a802f9cf52d3027fa3b, which\ncaused cross-architecture build problems for all the wrong reasons.\nIA64 already added its own version of __node_random(), but the fact is,\nthere is nothing architectural about the function, and the original\ncommit was just badly done. Revert it, since no fix is forthcoming.\n\nRequested-by: Stephen Rothwell \u003csfr@canb.auug.org.au\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\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": "29d03fa12bc02c0f8085cd6bb06d11359a4bccaf",
      "tree": "0810a1b2bad0f853b270afed55eddc595ae8d2fc",
      "parents": [
        "89ad6a6173127e5d31bea7a4a45ec23fa5bf4a17",
        "45e0fffc8a7778282e6a1514a6ae3e7ae6545111"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri May 28 10:16:27 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri May 28 10:16:27 2010 -0700"
      },
      "message": "Merge branch \u0027timers-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027timers-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n  posix_timer: Fix error path in timer_create\n  hrtimer: Avoid double seqlock\n  timers: Move local variable into else section\n  timers: Fix slack calculation really\n"
    },
    {
      "commit": "ea635c64e007061f6468ece5cc9cc62d41d4ecf2",
      "tree": "eaa7123e7749893e8f542d12cba616664bc2c848",
      "parents": [
        "d7065da038227a4d09a244e6014e0186a6bd21d0"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed May 26 17:40:29 2010 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Thu May 27 22:03:08 2010 -0400"
      },
      "message": "Fix racy use of anon_inode_getfd() in perf_event.c\n\nonce anon_inode_getfd() is called, you can\u0027t expect *anything* about\nstruct file that descriptor points to - another thread might be doing\nwhatever it likes with descriptor table at that point.\n\nCc: stable \u003cstable@kernel.org\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "c5617b200ac52e35f7e8cf05a17b0a2d50f6b3e9",
      "tree": "40d5e99660c77c5791392d349a93113c044dbf14",
      "parents": [
        "cad719d86e9dbd06634eaba6401e022c8101d6b2",
        "49c177461bfbedeccbab22bf3905db2f9da7f1c3"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 15:23:47 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 15:23:47 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: (61 commits)\n  tracing: Add __used annotation to event variable\n  perf, trace: Fix !x86 build bug\n  perf report: Support multiple events on the TUI\n  perf annotate: Fix up usage of the build id cache\n  x86/mmiotrace: Remove redundant instruction prefix checks\n  perf annotate: Add TUI interface\n  perf tui: Remove annotate from popup menu after failure\n  perf report: Don\u0027t start the TUI if -D is used\n  perf: Fix getline undeclared\n  perf: Optimize perf_tp_event_match()\n  perf: Remove more code from the fastpath\n  perf: Optimize the !vmalloc backed buffer\n  perf: Optimize perf_output_copy()\n  perf: Fix wakeup storm for RO mmap()s\n  perf-record: Share per-cpu buffers\n  perf-record: Remove -M\n  perf: Ensure that IOC_OUTPUT isn\u0027t used to create multi-writer buffers\n  perf, trace: Optimize tracepoints by using per-tracepoint-per-cpu hlist to track events\n  perf, trace: Optimize tracepoints by removing IRQ-disable from perf/tracepoint interaction\n  perf tui: Allow disabling the TUI on a per command basis in ~/.perfconfig\n  ...\n"
    },
    {
      "commit": "45e0fffc8a7778282e6a1514a6ae3e7ae6545111",
      "tree": "0a1022d1af7372169ca2b5b269b548997e2bdd83",
      "parents": [
        "174bd1994ec67a6e6191c4ed8e5dac17fa221b84"
      ],
      "author": {
        "name": "Andrey Vagin",
        "email": "avagin@openvz.org",
        "time": "Mon May 24 12:15:33 2010 -0700"
      },
      "committer": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Thu May 27 22:38:15 2010 +0200"
      },
      "message": "posix_timer: Fix error path in timer_create\n\nMove CLOCK_DISPATCH(which_clock, timer_create, (new_timer)) after all\nposible EFAULT erros.\n\n*_timer_create may allocate/get resources.\n(for example posix_cpu_timer_create does get_task_struct)\n\n[ tglx: fold the remove crappy comment patch into this ]\n\nSigned-off-by: Andrey Vagin \u003cavagin@openvz.org\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: \u003cstable@kernel.org\u003e\nReviewed-by: Stanislaw Gruszka \u003csgruszka@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n"
    },
    {
      "commit": "00b9b0af5887fed54e899e3b7f5c2ccf5e739def",
      "tree": "088cd96759cf4c1b2365c0e434dc95a8410b547c",
      "parents": [
        "e2e2400bd4faee24d11872134b7ae5bd363749c0"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 10:32:08 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 10:32:08 2010 -0700"
      },
      "message": "Avoid warning when CPU hotplug isn\u0027t enabled\n\nCommit e9fb7631ebcd (\"cpu-hotplug: introduce cpu_notify(),\n__cpu_notify(), cpu_notify_nofail()\") also introduced this annoying\nwarning:\n\n  kernel/cpu.c:157: warning: \u0027cpu_notify_nofail\u0027 defined but not used\n\nwhen CONFIG_HOTPLUG_CPU wasn\u0027t set.\n\nSo move that helper inside the #ifdef CONFIG_HOTPLUG_CPU region, and\nsimplify it while at it.\n\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "3dd6b5fb436083fdd8af7ad2baa07db19deb73b2",
      "tree": "9c97bccad863663e36224e96b00f00b5a7dbaea6",
      "parents": [
        "7d6e6d09de82cf6cff7fecdba55198b9f47b381c"
      ],
      "author": {
        "name": "Lee Schermerhorn",
        "email": "lee.schermerhorn@hp.com",
        "time": "Wed May 26 14:45:04 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:57 2010 -0700"
      },
      "message": "numa: in-kernel profiling: use cpu_to_mem() for per cpu allocations\n\nIn kernel profiling requires that we be able to allocate \"local\" memory\nfor each cpu.  Use \"cpu_to_mem()\" instead of \"cpu_to_node()\" to support\nmemoryless nodes.\n\nDepends on the \"numa_mem_id()\" patch.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Eric Whitney \u003ceric.whitney@hp.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: \"H. Peter Anvin\" \u003chpa@zytor.com\u003e\nCc: \"Luck, Tony\" \u003ctony.luck@intel.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: \u003clinux-arch@vger.kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "5b530fc18324602e1ecb70cd280c2194b2656a5e",
      "tree": "d96b7b408818606ebdc41c1895c8eb4ed03db37a",
      "parents": [
        "cccad8f9f0f1be585c9dc534857ca9c67e538836"
      ],
      "author": {
        "name": "Anton Blanchard",
        "email": "anton@samba.org",
        "time": "Wed May 26 14:44:24 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:53 2010 -0700"
      },
      "message": "panic: call console_verbose() in panic\n\nMost distros turn the console verbosity down and that means a backtrace\nafter a panic never makes it to the console.  I assume we haven\u0027t seen\nthis because a panic is often preceeded by an oops which will have called\nconsole_verbose.  There are however a lot of places we call panic\ndirectly, and they are broken.\n\nUse console_verbose like we do in the oops path to ensure a directly\ncalled panic will print a backtrace.\n\nSigned-off-by: Anton Blanchard \u003canton@samba.org\u003e\nAcked-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "f106eee10038c2ee5b6056aaf3f6d5229be6dcdd",
      "tree": "de7ce930b7119a1be00f3c7604065896d31abc9c",
      "parents": [
        "f20011457f41c11edb5ea5038ad0c8ea9f392023"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:44:11 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:52 2010 -0700"
      },
      "message": "pids: fix fork_idle() to setup -\u003epids correctly\n\ncopy_process(pid \u003d\u003e \u0026init_struct_pid) doesn\u0027t do attach_pid/etc.\n\nIt shouldn\u0027t, but this means that the idle threads run with the wrong\npids copied from the caller\u0027s task_struct. In x86 case the caller is\neither kernel_init() thread or keventd.\n\nIn particular, this means that after the series of cpu_up/cpu_down an\nidle thread (which never exits) can run with .pid pointing to nowhere.\n\nChange fork_idle() to initialize idle-\u003epids[] correctly. We only set\n.pid \u003d \u0026init_struct_pid but do not add .node to list, INIT_TASK() does\nthe same for the boot-cpu idle thread (swapper).\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Cedric Le Goater \u003cclg@fr.ibm.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: Eric Biederman \u003cebiederm@xmission.com\u003e\nCc: Herbert Poetzl \u003cherbert@13thfloor.at\u003e\nCc: Mathias Krause \u003cMathias.Krause@secunet.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: Sukadev Bhattiprolu \u003csukadev@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": "72680a191b934377430032f93af15ef50aafb3a8",
      "tree": "e6f41babe66bf642204b3d92e793f5071739b1d2",
      "parents": [
        "bd4fb654e3a0d83ca8cb138c5e3e6e65407e119c"
      ],
      "author": {
        "name": "Hedi Berriche",
        "email": "hedi@sgi.com",
        "time": "Wed May 26 14:44:06 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:51 2010 -0700"
      },
      "message": "pids: increase pid_max based on num_possible_cpus\n\nOn a system with a substantial number of processors, the early default\npid_max of 32k will not be enough.  A system with 1664 CPU\u0027s, there are\n25163 processes started before the login prompt.  It\u0027s estimated that with\n2048 CPU\u0027s we will pass the 32k limit.  With 4096, we\u0027ll reach that limit\nvery early during the boot cycle, and processes would stall waiting for an\navailable pid.\n\nThis patch increases the early maximum number of pids available, and\nincreases the minimum number of pids that can be set during runtime.\n\n[akpm@linux-foundation.org: fix warnings]\nSigned-off-by: Hedi Berriche \u003chedi@sgi.com\u003e\nSigned-off-by: Mike Travis \u003ctravis@sgi.com\u003e\nSigned-off-by: Robin Holt \u003cholt@sgi.com\u003e\nAcked-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: Alan Cox \u003calan@lxorguk.ukuu.org.uk\u003e\nCc: Greg KH \u003cgregkh@suse.de\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: John Stoffel \u003cjohn@stoffel.org\u003e\nCc: Jack Steiner \u003csteiner@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "79a6cdeb7eb54e3d2d4bb9fc5f0231b057882a87",
      "tree": "2a80342946cf206002ce5dcf32f097320f64fdd1",
      "parents": [
        "c9d221f86e43d9fb16260fe18a8cd6767f36c8a5"
      ],
      "author": {
        "name": "Lai Jiangshan",
        "email": "laijs@cn.fujitsu.com",
        "time": "Wed May 26 14:43:36 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:48 2010 -0700"
      },
      "message": "cpuhotplug: do not need cpu_hotplug_begin() when CONFIG_HOTPLUG_CPU\u003dn\n\nSince when CONFIG_HOTPLUG_CPU\u003dn, get_online_cpus() do nothing, so we don\u0027t\nneed cpu_hotplug_begin() either.\n\nThis patch moves cpu_hotplug_begin()/cpu_hotplug_done() into the code\nblock of CONFIG_HOTPLUG_CPU\u003dy.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nCc: Gautham R Shenoy \u003cego@in.ibm.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\n\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "80b5184cc537718122e036afe7e62d202b70d077",
      "tree": "d4e2b400f0e951156d64d546fd563fa5a8ab02d3",
      "parents": [
        "ad84bb5b98bf81deae97e3bcd814675d6b4e6f72"
      ],
      "author": {
        "name": "Akinobu Mita",
        "email": "akinobu.mita@gmail.com",
        "time": "Wed May 26 14:43:32 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:48 2010 -0700"
      },
      "message": "kernel/: convert cpu notifier to return encapsulate errno value\n\nBy the previous modification, the cpu notifier can return encapsulate\nerrno value.  This converts the cpu notifiers for kernel/*.c\n\nSigned-off-by: Akinobu Mita \u003cakinobu.mita@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "e6bde73b07edeb703d4c89c1daabc09c303de11f",
      "tree": "9b60a3fc2ce002b26e46611357cb5529795e7ac5",
      "parents": [
        "e9fb7631ebcdc9467cbb736337546a42f7b7f28e"
      ],
      "author": {
        "name": "Akinobu Mita",
        "email": "akinobu.mita@gmail.com",
        "time": "Wed May 26 14:43:29 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:47 2010 -0700"
      },
      "message": "cpu-hotplug: return better errno on cpu hotplug failure\n\nCurrently, onlining or offlining a CPU failure by one of the cpu notifiers\nerror always cause -EINVAL error.  (i.e.  writing 0 or 1 to\n/sys/devices/system/cpu/cpuX/online gets EINVAL)\n\nTo get better error reporting rather than always getting -EINVAL, This\nchanges cpu_notify() to return -errno value with notifier_to_errno() and\nfix the callers.  Now that cpu notifiers can return encapsulate errno\nvalue.\n\nCurrently, all cpu hotplug notifiers return NOTIFY_OK, NOTIFY_BAD, or\nNOTIFY_DONE.  So cpu_notify() can returns 0 or -EPERM with this change for\nnow.\n\n(notifier_to_errno(NOTIFY_OK) \u003d\u003d 0, notifier_to_errno(NOTIFY_DONE) \u003d\u003d 0,\nnotifier_to_errno(NOTIFY_BAD) \u003d\u003d -EPERM)\n\nForthcoming patches convert several cpu notifiers to return encapsulate\nerrno value with notifier_from_errno().\n\nSigned-off-by: Akinobu Mita \u003cakinobu.mita@gmail.com\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "e9fb7631ebcdc9467cbb736337546a42f7b7f28e",
      "tree": "1887c2a8dc858d966c3b0bd63d9026908e5eb572",
      "parents": [
        "36e15263aa5dcf3b72f1f88437e69497782b7ab8"
      ],
      "author": {
        "name": "Akinobu Mita",
        "email": "akinobu.mita@gmail.com",
        "time": "Wed May 26 14:43:28 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:47 2010 -0700"
      },
      "message": "cpu-hotplug: introduce cpu_notify(), __cpu_notify(), cpu_notify_nofail()\n\nNo functional change.  These are just wrappers of\nraw_cpu_notifier_call_chain.\n\nSigned-off-by: Akinobu Mita \u003cakinobu.mita@gmail.com\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "b3ac022cb9dc5883505a88b159d1b240ad1ef405",
      "tree": "bffa035303cbe3c5bde048ac3d3154fb57059e2d",
      "parents": [
        "dd98acf74762764fbc4382a1d9a244f11a2658cc"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:24 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:47 2010 -0700"
      },
      "message": "proc: turn signal_struct-\u003ecount into \"int nr_threads\"\n\nNo functional changes, just s/atomic_t count/int nr_threads/.\n\nWith the recent changes this counter has a single user, get_nr_threads()\nAnd, none of its callers need the really accurate number of threads, not\nto mention each caller obviously races with fork/exit.  It is only used to\nreport this value to the user-space, except first_tid() uses it to avoid\nthe unnecessary while_each_thread() loop in the unlikely case.\n\nIt is a bit sad we need a word in struct signal_struct for this, perhaps\nwe can change get_nr_threads() to approximate the number of threads using\nsignal-\u003elive and kill -\u003enr_threads later.\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\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": "5089a9768041206c76fac299ccd82a528c24c254",
      "tree": "88c7951ab137bc04db3ca02ef8bfeef2536472e2",
      "parents": [
        "7e49827cc937a742ae02078b483e3eb78f791a2a"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:22 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:47 2010 -0700"
      },
      "message": "proc_sched_show_task(): use get_nr_threads()\n\nTrivial, use get_nr_threads() helper to read signal-\u003ecount which we are\ngoing to change.\n\nLike other callers, proc_sched_show_task() doesn\u0027t need the exactly\nprecise nr_threads.\n\nDavid said:\n\n: Note that get_nr_threads() isn\u0027t completely equivalent (it can return 0\n: where proc_sched_show_task() will display a 1).  But I don\u0027t think this\n: should be a problem.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: David Howells \u003cdhowells@redhat.com\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": "6e1be45aa6ba6a36c0312f65ecf311135c73001d",
      "tree": "3ea540e0ee249259e40e26c38215981b466075ad",
      "parents": [
        "97101eb41d0d3c97543878ce40e0b8a8b2747ed7"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:21 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:47 2010 -0700"
      },
      "message": "check_unshare_flags: kill the bogus CLONE_SIGHAND/sig-\u003ecount check\n\ncheck_unshare_flags(CLONE_SIGHAND) adds CLONE_THREAD to *flags_ptr if the\ntask is multithreaded to ensure unshare_thread() will fail.\n\nNot only this is a bit strange way to return the error, this is absolutely\nmeaningless.  If signal-\u003ecount \u003e 1 then sighand-\u003ecount must be also \u003e 1,\nand unshare_sighand() will fail anyway.\n\nIn fact, all CLONE_THREAD/SIGHAND/VM checks inside sys_unshare() do not\nlook right.  Fortunately this code doesn\u0027t really work anyway.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Veaceslav Falico \u003cvfalico@redhat.com\u003e\nCc: Stanislaw Gruszka \u003csgruszka@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": "97101eb41d0d3c97543878ce40e0b8a8b2747ed7",
      "tree": "d33299c8d4787d3b578ea432fdaceb965a2acd97",
      "parents": [
        "a705be6b5e8b05f2ae51536ec709de921960326c"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:20 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:46 2010 -0700"
      },
      "message": "exit: move taskstats_tgid_free() from __exit_signal() to free_signal_struct()\n\nMove taskstats_tgid_free() from __exit_signal() to free_signal_struct().\n\nThis way signal-\u003estats never points to nowhere and we can read -\u003estats\nlockless.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Roland McGrath \u003croland@redhat.com\u003e\nCc: Veaceslav Falico \u003cvfalico@redhat.com\u003e\nCc: Stanislaw Gruszka \u003csgruszka@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": "a705be6b5e8b05f2ae51536ec709de921960326c",
      "tree": "a4d71651807dabe2dc48bd36cf2e954d7ef967a8",
      "parents": [
        "d40e48e02f3785b9342ee4eb3d7cc9f12981b7f5"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:19 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:46 2010 -0700"
      },
      "message": "kill the obsolete thread_group_cputime_free() helper\n\nKill the empty thread_group_cputime_free() helper.  It was needed to free\nthe per-cpu data which we no longer have.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Roland McGrath \u003croland@redhat.com\u003e\nCc: Veaceslav Falico \u003cvfalico@redhat.com\u003e\nCc: Stanislaw Gruszka \u003csgruszka@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": "d40e48e02f3785b9342ee4eb3d7cc9f12981b7f5",
      "tree": "05f900ae17f4727c0e8b8c2c84d41b1cee7c13b0",
      "parents": [
        "b7b8ff6373d4b910af081f76888395e6df53249d"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:19 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:46 2010 -0700"
      },
      "message": "exit: __exit_signal: use thread_group_leader() consistently\n\nCleanup:\n\n- Add the boolean, group_dead \u003d thread_group_leader(), for clarity.\n\n- Do not test/set sig \u003d\u003d NULL to detect the all-dead case, use this\n  boolean.\n\n- Pass this boolen to __unhash_process() and use it instead of another\n  thread_group_leader() call which needs -\u003egroup_leader.\n\n  This can be considered as microoptimization, but hopefully this also\n  allows us do do other cleanups later.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Roland McGrath \u003croland@redhat.com\u003e\nCc: Veaceslav Falico \u003cvfalico@redhat.com\u003e\nCc: Stanislaw Gruszka \u003csgruszka@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": "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": "4ada856fb0ee62f6fe3aac3de726deac0640d929",
      "tree": "8dd3efbc19f6e1f1dac2ff7afdcd9658fb08b814",
      "parents": [
        "ea6d290ca34c4fd91b7348338c0cc7bdeff94a35"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:17 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:46 2010 -0700"
      },
      "message": "signals: clear signal-\u003etty when the last thread exits\n\nWhen the last thread exits signal-\u003etty is freed, but the pointer is not\ncleared and points to nowhere.\n\nThis is OK.  Nobody should use signal-\u003etty lockless, and it is no longer\npossible to take -\u003esiglock.  However this looks wrong even if correct, and\nthe nice OOPS is better than subtle and hard to find bugs.\n\nChange __exit_signal() to clear signal-\u003etty under -\u003esiglock.\n\nNote: __exit_signal() needs more cleanups.  It should not check \"sig !\u003d\nNULL\" to detect the all-dead case and we have the same issues with\nsignal-\u003estats.\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\nAcked-by: 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": "ea6d290ca34c4fd91b7348338c0cc7bdeff94a35",
      "tree": "6e9bd367650d9233c5b6cf1059845f17cb1bc460",
      "parents": [
        "4dec2a91fd7e8815d730afbfdcf085cbf53433ac"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:16 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:46 2010 -0700"
      },
      "message": "signals: make task_struct-\u003esignal immutable/refcountable\n\nWe have a lot of problems with accessing task_struct-\u003esignal, it can\n\"disappear\" at any moment.  Even current can\u0027t use its -\u003esignal safely\nafter exit_notify().  -\u003esiglock helps, but it is not convenient, not\nalways possible, and sometimes it makes sense to use task-\u003esignal even\nafter this task has already dead.\n\nThis patch adds the reference counter, sigcnt, into signal_struct.  This\nreference is owned by task_struct and it is dropped in\n__put_task_struct().  Perhaps it makes sense to export\nget/put_signal_struct() later, but currently I don\u0027t see the immediate\nreason.\n\nRename __cleanup_signal() to free_signal_struct() and unexport it.  With\nthe previous changes it does nothing except kmem_cache_free().\n\nChange __exit_signal() to not clear/free -\u003esignal, it will be freed when\nthe last reference to any thread in the thread group goes away.\n\nNote:\n\t- when the last thead exits signal-\u003etty can point to nowhere, see\n\t  the next patch.\n\n\t- with or without this patch signal_struct-\u003ecount should go away,\n\t  or at least it should be \"int nr_threads\" for fs/proc. This will\n\t  be addressed 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": "4dec2a91fd7e8815d730afbfdcf085cbf53433ac",
      "tree": "cd33cc793abf532d4ca212d09c1e8d3154a8b530",
      "parents": [
        "ffdf91856c812646aa276711fa7e3ad80b00764a"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:15 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:46 2010 -0700"
      },
      "message": "fork/exit: move tty_kref_put() outside of __cleanup_signal()\n\ntty_kref_put() has two callsites in copy_process() paths,\n\n\t1. if copy_process() suceeds it is called before we copy\n\t   signal-\u003etty from parent\n\n\t2. otherwise it is called from __cleanup_signal() under\n\t   bad_fork_cleanup_signal: label\n\nIn both cases tty_kref_put() is not right and unneeded because we don\u0027t\nhave the balancing tty_kref_get().  Fortunately, this is harmless because\nthis can only happen without CLONE_THREAD, and in this case signal-\u003etty\nmust be NULL.\n\nRemove tty_kref_put() from copy_process() and __cleanup_signal(), and\nchange another caller of __cleanup_signal(), __exit_signal(), to call\ntty_kref_put() by hand.\n\nI hope this change makes sense by itself, but it is also needed to make\n-\u003esignal refcountable.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Alan Cox \u003calan@linux.intel.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Greg KH \u003cgreg@kroah.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "d30fda355188272430d3865db2ff9e24b4135ae3",
      "tree": "a763bd24dac66b8d287304bd1cabab859ddf9ae1",
      "parents": [
        "4a5999429739844367d0f77a65efdd7db8202779"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:13 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:46 2010 -0700"
      },
      "message": "posix-cpu-timers: avoid \"task-\u003esignal !\u003d NULL\" checks\n\nPreparation to make task-\u003esignal immutable, no functional changes.\n\nposix-cpu-timers.c checks task-\u003esignal !\u003d NULL to ensure this task is\nalive and didn\u0027t pass __exit_signal().  This is correct but we are going\nto change the lifetime rules for -\u003esignal and never reset this pointer.\n\nChange the code to check -\u003esighand instead, it doesn\u0027t matter which\npointer we check under tasklist, they both are cleared simultaneously.\n\nAs Roland pointed out, some of these changes are not strictly needed and\nprobably it makes sense to revert them later, when -\u003esignal will be pinned\nto task_struct.  But this patch tries to ensure the subsequent changes in\nfork/exit can\u0027t make any visible impact on posix cpu timers.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Fenghua Yu \u003cfenghua.yu@intel.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Stanislaw Gruszka \u003csgruszka@redhat.com\u003e\nCc: Tony Luck \u003ctony.luck@intel.com\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "4a5999429739844367d0f77a65efdd7db8202779",
      "tree": "fff1158fa43466b30294a7db2c4629ca14973770",
      "parents": [
        "d344193a05da89c97e965da2c5cbf687d7385eae"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:12 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:46 2010 -0700"
      },
      "message": "exit: avoid sig-\u003ecount in __exit_signal() to detect the group-dead case\n\nChange __exit_signal() to check thread_group_leader() instead of\natomic_dec_and_test(\u0026sig-\u003ecount).  This must be equivalent, the group\nleader must be released only after all other threads have exited and\npassed __exit_signal().\n\nHenceforth sig-\u003ecount is not actually used, except in fs/proc for\nget_nr_threads/etc.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Veaceslav Falico \u003cvfalico@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": "d344193a05da89c97e965da2c5cbf687d7385eae",
      "tree": "6267b68c31c4547f1749acd35d2a5bfaff919839",
      "parents": [
        "09faef11df8c559a23e2405d123cb2683733a79a"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:11 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:46 2010 -0700"
      },
      "message": "exit: avoid sig-\u003ecount in de_thread/__exit_signal synchronization\n\nde_thread() and __exit_signal() use signal_struct-\u003ecount/notify_count for\nsynchronization.  We can simplify the code and use -\u003enotify_count only.\nInstead of comparing these two counters, we can change de_thread() to set\n-\u003enotify_count \u003d nr_of_sub_threads, then change __exit_signal() to\ndec-and-test this counter and notify group_exit_task.\n\nNote that __exit_signal() checks \"notify_count \u003e 0\" just for symmetry with\nexit_notify(), we could just check it is !\u003d 0.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Veaceslav Falico \u003cvfalico@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": "09faef11df8c559a23e2405d123cb2683733a79a",
      "tree": "db8e4c94677be8afebde938c2e6b7ba07b6b6db0",
      "parents": [
        "9c3391684415c9dca239130d9e433a60a4edf04b"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:11 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:46 2010 -0700"
      },
      "message": "exit: change zap_other_threads() to count sub-threads\n\nChange zap_other_threads() to return the number of other sub-threads found\non -\u003ethread_group list.\n\nOther changes are cosmetic:\n\n\t- change the code to use while_each_thread() helper\n\n\t- remove the obsolete comment about SIGKILL/SIGSTOP\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Veaceslav Falico \u003cvfalico@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": "9c3391684415c9dca239130d9e433a60a4edf04b",
      "tree": "a8019b964c625cfeeda0e9d85bafa48991546212",
      "parents": [
        "269b005a28e124a341df4adef2c3661cf7371fcc"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:10 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:45 2010 -0700"
      },
      "message": "exit: exit_notify() can trust signal-\u003enotify_count \u003c 0\n\nsignal_struct-\u003ecount in its current form must die.\n\n- it has no reasons to be atomic_t\n\n- it looks like a reference counter, but it is not\n\n- otoh, we really need to make task-\u003esignal refcountable, just look at\n  the extremely ugly task_rq_unlock_wait() called from __exit_signals().\n\n- we should change the lifetime rules for task-\u003esignal, it should be\n  pinned to task_struct.  We have a lot of code which can be simplified\n  after that.\n\n- it is not needed!  while the code is correct, any usage of this\n  counter is artificial, except fs/proc uses it correctly to show the\n  number of threads.\n\nThis series removes the usage of sig-\u003ecount from exit pathes.\n\nThis patch:\n\nNow that Veaceslav changed copy_signal() to use zalloc(), exit_notify()\ncan just check notify_count \u003c 0 to ensure the execing sub-threads needs\nthe notification from us.  No need to do other checks, notify_count !\u003d 0\nmust always mean -\u003egroup_exit_task !\u003d NULL is waiting for us.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nCc: Veaceslav Falico \u003cvfalico@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": "04b1c384fbc4e0209e5c1affb67050886376d44b",
      "tree": "19bc8690113dd6ded88d465a0777cb8bf7e33262",
      "parents": [
        "d47419cd967a4f032a194148a7b08afad32faded"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:05 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:45 2010 -0700"
      },
      "message": "call_usermodehelper: UMH_WAIT_EXEC ignores kernel_thread() failure\n\nUMH_WAIT_EXEC should report the error if kernel_thread() fails, like\nUMH_WAIT_PROC does.\n\nSigned-off-by: Oleg Nesterov \u003coleg@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": "d47419cd967a4f032a194148a7b08afad32faded",
      "tree": "b330b3adbaf1b2528b663322adff11a2761cb4b4",
      "parents": [
        "7d64224217b53b23243fd2aa428001486f2a5da5"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:04 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:45 2010 -0700"
      },
      "message": "call_usermodehelper: simplify/fix UMH_NO_WAIT case\n\n__call_usermodehelper(UMH_NO_WAIT) has 2 problems:\n\n\t- if kernel_thread() fails, call_usermodehelper_freeinfo()\n\t  is not called.\n\n\t- for unknown reason UMH_NO_WAIT has UMH_WAIT_PROC logic,\n\t  we spawn yet another thread which waits until the user\n\t  mode application exits.\n\nChange the UMH_NO_WAIT code to use ____call_usermodehelper() instead of\nwait_for_helper(), and do call_usermodehelper_freeinfo() unconditionally.\nWe can rely on CLONE_VFORK, do_fork(CLONE_VFORK) until the child exits or\nexecs.\n\nWith or without this patch UMH_NO_WAIT does not report the error if\nkernel_thread() fails, this is correct since the caller doesn\u0027t wait for\nresult.\n\nSigned-off-by: Oleg Nesterov \u003coleg@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": "7d64224217b53b23243fd2aa428001486f2a5da5",
      "tree": "23219e8d6d81e891fe2571e10be6feab7f81cd49",
      "parents": [
        "363da4022c2753bf4b4b54a1bb9e4527fdcb9d5d"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:03 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:45 2010 -0700"
      },
      "message": "wait_for_helper: SIGCHLD from user-space can lead to use-after-free\n\n1. wait_for_helper() calls allow_signal(SIGCHLD) to ensure the child\n   can\u0027t autoreap itself.\n\n   However, this means that a spurious SIGCHILD from user-space can\n   set TIF_SIGPENDING and:\n\n   \t- kernel_thread() or sys_wait4() can fail due to signal_pending()\n\n   \t- worse, wait4() can fail before ____call_usermodehelper() execs\n   \t  or exits. In this case the caller may kfree(subprocess_info)\n   \t  while the child still uses this memory.\n\n   Change the code to use SIG_DFL instead of magic \"(void __user *)2\"\n   set by allow_signal(). This means that SIGCHLD won\u0027t be delivered,\n   yet the child won\u0027t autoreap itsefl.\n\n   The problem is minor, only root can send a signal to this kthread.\n\n2. If sys_wait4(\u0026ret) fails it doesn\u0027t populate \"ret\", in this case\n   wait_for_helper() reports a random value from uninitialized var.\n\n   With this patch sys_wait4() should never fail, but still it makes\n   sense to initialize ret \u003d -ECHILD so that the caller can notice\n   the problem.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Neil Horman \u003cnhorman@tuxdriver.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "363da4022c2753bf4b4b54a1bb9e4527fdcb9d5d",
      "tree": "103922ef0f185daebf5a3e8029663ab78eaed363",
      "parents": [
        "c70a626d3eba373514c72287c93588b6974a0059"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:02 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:45 2010 -0700"
      },
      "message": "call_usermodehelper: no need to unblock signals\n\n____call_usermodehelper() correctly calls flush_signal_handlers() to set\nSIG_DFL, but sigemptyset(-\u003eblocked) and recalc_sigpending() are not\nneeded.\n\nThis kthread was forked by workqueue thread, all signals must be unblocked\nand ignored, no pending signal is possible.\n\nSigned-off-by: Oleg Nesterov \u003coleg@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": "c70a626d3eba373514c72287c93588b6974a0059",
      "tree": "c23b890cbbeb824e52e1eaee6812bc88496a246d",
      "parents": [
        "685bfd2c48bb3284d31e73ff3151c957d76deda9"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:01 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:45 2010 -0700"
      },
      "message": "umh: creds: kill subprocess_info-\u003ecred logic\n\nNow that nobody ever changes subprocess_info-\u003ecred we can kill this member\nand related code.  ____call_usermodehelper() always runs in the context of\nfreshly forked kernel thread, it has the proper -\u003ecred copied from its\nparent kthread, keventd.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Neil Horman \u003cnhorman@tuxdriver.com\u003e\nAcked-by: David Howells \u003cdhowells@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": "685bfd2c48bb3284d31e73ff3151c957d76deda9",
      "tree": "177210787515f48c0eaad5216bd012f4a2fb2149",
      "parents": [
        "898b374af6f71041bd3bceebe257e564f3f1d458"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:43:00 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:45 2010 -0700"
      },
      "message": "umh: creds: convert call_usermodehelper_keys() to use subprocess_info-\u003einit()\n\ncall_usermodehelper_keys() uses call_usermodehelper_setkeys() to change\nsubprocess_info-\u003ecred in advance.  Now that we have info-\u003einit() we can\nchange this code to set tgcred-\u003esession_keyring in context of execing\nkernel thread.\n\nNote: since currently call_usermodehelper_keys() is never called with\nUMH_NO_WAIT, call_usermodehelper_keys()-\u003ekey_get() and umh_keys_cleanup()\nare not really needed, we could rely on install_session_keyring_to_cred()\nwhich does key_get() on success.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Neil Horman \u003cnhorman@tuxdriver.com\u003e\nAcked-by: David Howells \u003cdhowells@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": "898b374af6f71041bd3bceebe257e564f3f1d458",
      "tree": "b1be6fd3cca69becfc75787eab906338f363d3cd",
      "parents": [
        "a06a4dc3a08201ff6a8a958f935b3cbf7744115f"
      ],
      "author": {
        "name": "Neil Horman",
        "email": "nhorman@tuxdriver.com",
        "time": "Wed May 26 14:42:59 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:44 2010 -0700"
      },
      "message": "exec: replace call_usermodehelper_pipe with use of umh init function and resolve limit\n\nThe first patch in this series introduced an init function to the\ncall_usermodehelper api so that processes could be customized by caller.\nThis patch takes advantage of that fact, by customizing the helper in\ndo_coredump to create the pipe and set its core limit to one (for our\nrecusrsion check).  This lets us clean up the previous uglyness in the\nusermodehelper internals and factor call_usermodehelper out entirely.\nWhile I\u0027m at it, we can also modify the helper setup to look for a core\nlimit value of 1 rather than zero for our recursion check\n\nSigned-off-by: Neil Horman \u003cnhorman@tuxdriver.com\u003e\nReviewed-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "a06a4dc3a08201ff6a8a958f935b3cbf7744115f",
      "tree": "b338edde5edb31f51e0b7eb86e6c4ce8063c703f",
      "parents": [
        "065add3941bdca54fe04ed3471a96bce9af88793"
      ],
      "author": {
        "name": "Neil Horman",
        "email": "nhorman@tuxdriver.com",
        "time": "Wed May 26 14:42:58 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:44 2010 -0700"
      },
      "message": "kmod: add init function to usermodehelper\n\nAbout 6 months ago, I made a set of changes to how the core-dump-to-a-pipe\nfeature in the kernel works.  We had reports of several races, including\nsome reports of apps bypassing our recursion check so that a process that\nwas forked as part of a core_pattern setup could infinitely crash and\nrefork until the system crashed.\n\nWe fixed those by improving our recursion checks.  The new check basically\nrefuses to fork a process if its core limit is zero, which works well.\n\nUnfortunately, I\u0027ve been getting grief from maintainer of user space\nprograms that are inserted as the forked process of core_pattern.  They\ncontend that in order for their programs (such as abrt and apport) to\nwork, all the running processes in a system must have their core limits\nset to a non-zero value, to which I say \u0027yes\u0027.  I did this by design, and\nthink thats the right way to do things.\n\nBut I\u0027ve been asked to ease this burden on user space enough times that I\nthought I would take a look at it.  The first suggestion was to make the\nrecursion check fail on a non-zero \u0027special\u0027 number, like one.  That way\nthe core collector process could set its core size ulimit to 1, and enable\nthe kernel\u0027s recursion detection.  This isn\u0027t a bad idea on the surface,\nbut I don\u0027t like it since its opt-in, in that if a program like abrt or\napport has a bug and fails to set such a core limit, we\u0027re left with a\nrecursively crashing system again.\n\nSo I\u0027ve come up with this.  What I\u0027ve done is modify the\ncall_usermodehelper api such that an extra parameter is added, a function\npointer which will be called by the user helper task, after it forks, but\nbefore it exec\u0027s the required process.  This will give the caller the\nopportunity to get a call back in the processes context, allowing it to do\nwhatever it needs to to the process in the kernel prior to exec-ing the\nuser space code.  In the case of do_coredump, this callback is ues to set\nthe core ulimit of the helper process to 1.  This elimnates the opt-in\nproblem that I had above, as it allows the ulimit for core sizes to be set\nto the value of 1, which is what the recursion check looks for in\ndo_coredump.\n\nThis patch:\n\nCreate new function call_usermodehelper_fns() and allow it to assign both\nan init and cleanup function, as we\u0027ll as arbitrary data.\n\nThe init function is called from the context of the forked process and\nallows for customization of the helper process prior to calling exec.  Its\nreturn code gates the continuation of the process, or causes its exit.\nAlso add an arbitrary data pointer to the subprocess_info struct allowing\nfor data to be passed from the caller to the new process, and the\nsubsequent cleanup process\n\nAlso, use this patch to cleanup the cleanup function.  It currently takes\nan argp and envp pointer for freeing, which is ugly.  Lets instead just\nmake the subprocess_info structure public, and pass that to the cleanup\nand init routines\n\nSigned-off-by: Neil Horman \u003cnhorman@tuxdriver.com\u003e\nReviewed-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "065add3941bdca54fe04ed3471a96bce9af88793",
      "tree": "0c3505a04bb1b54926c527644c0ee2f57680c250",
      "parents": [
        "e0129ef91ed758c06b6557c36124acfb2e1c7305"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:42:54 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:44 2010 -0700"
      },
      "message": "signals: check_kill_permission(): don\u0027t check creds if same_thread_group()\n\nAndrew Tridgell reports that aio_read(SIGEV_SIGNAL) can fail if the\nnotification from the helper thread races with setresuid(), see\nhttp://samba.org/~tridge/junkcode/aio_uid.c\n\nThis happens because check_kill_permission() doesn\u0027t permit sending a\nsignal to the task with the different cred-\u003exids.  But there is not any\nsecurity reason to check -\u003ecred\u0027s when the task sends a signal (private or\ngroup-wide) to its sub-thread.  Whatever we do, any thread can bypass all\nsecurity checks and send SIGKILL to all threads, or it can block a signal\nSIG and do kill(gettid(), SIG) to deliver this signal to another\nsub-thread.  Not to mention that CLONE_THREAD implies CLONE_VM.\n\nChange check_kill_permission() to avoid the credentials check when the\nsender and the target are from the same thread group.\n\nAlso, move \"cred \u003d current_cred()\" down to avoid calling get_current()\ntwice.\n\nNote: David Howells pointed out we could relax this even more, the\nCLONE_SIGHAND (without CLONE_THREAD) case probably does not need\nthese checks too.\n\nRoland said:\n: The glibc (libpthread) that does set*id across threads has\n: been in use for a while (2.3.4?), probably in distro\u0027s using kernels as old\n: or older than any active -stable streams.  In the race in question, this\n: kernel bug is breaking valid POSIX application expectations.\n\nReported-by: Andrew Tridgell \u003ctridge@samba.org\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nAcked-by: David Howells \u003cdhowells@redhat.com\u003e\nCc: Eric Paris \u003ceparis@parisplace.org\u003e\nCc: Jakub Jelinek \u003cjakub@redhat.com\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nCc: Roland McGrath \u003croland@redhat.com\u003e\nCc: Stephen Smalley \u003csds@tycho.nsa.gov\u003e\nCc: \u003cstable@kernel.org\u003e\t\t[all kernel versions]\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "e0129ef91ed758c06b6557c36124acfb2e1c7305",
      "tree": "e47392371ed106f2241d18ac6339bedd6c699c9b",
      "parents": [
        "9c1a125921d146f22cf28ff366ff69fd602a0e9b"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Wed May 26 14:42:53 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:44 2010 -0700"
      },
      "message": "ptrace: PTRACE_GETFDPIC: fix the unsafe usage of child-\u003emm\n\nNow that Mike Frysinger unified the FDPIC ptrace code, we can fix the\nunsafe usage of child-\u003emm in ptrace_request(PTRACE_GETFDPIC).\n\nWe have the reference to task_struct, and ptrace_check_attach() verified\nthe tracee is stopped.  But nothing can protect from SIGKILL after that,\nwe must not assume child-\u003emm !\u003d NULL.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Mike Frysinger \u003cvapier.adi@gmail.com\u003e\nAcked-by: David Howells \u003cdhowells@redhat.com\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Greg Ungerer \u003cgerg@snapgear.com\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": "9c1a125921d146f22cf28ff366ff69fd602a0e9b",
      "tree": "37df1b2ae74c23371de7e8b46427fc0a16727cdb",
      "parents": [
        "0ac0c0d0f837c499afd02a802f9cf52d3027fa3b"
      ],
      "author": {
        "name": "Mike Frysinger",
        "email": "vapier@gentoo.org",
        "time": "Wed May 26 14:42:52 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:44 2010 -0700"
      },
      "message": "ptrace: unify FDPIC implementations\n\nThe Blackfin/FRV/SuperH guys all have the same exact FDPIC ptrace code in\ntheir arch handlers (since they were probably copied \u0026 pasted).  Since\nthese ptrace interfaces are an arch independent aspect of the FDPIC code,\nunify them in the common ptrace code so new FDPIC ports don\u0027t need to copy\nand paste this fundamental stuff yet again.\n\nSigned-off-by: Mike Frysinger \u003cvapier@gentoo.org\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nAcked-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Oleg Nesterov \u003coleg@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": "0ac0c0d0f837c499afd02a802f9cf52d3027fa3b",
      "tree": "c20a7306d4b727722556af1aa5565855686aee07",
      "parents": [
        "6adef3ebe570bcde67fd6c16101451ddde5712b5"
      ],
      "author": {
        "name": "Jack Steiner",
        "email": "steiner@sgi.com",
        "time": "Wed May 26 14:42:51 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:44 2010 -0700"
      },
      "message": "cpusets: randomize node rotor used in cpuset_mem_spread_node()\n\nSome workloads that create a large number of small files tend to assign\ntoo many pages to node 0 (multi-node systems).  Part of the reason is that\nthe rotor (in cpuset_mem_spread_node()) used to assign nodes starts at\nnode 0 for newly created tasks.\n\nThis patch changes the rotor to be initialized to a random node number of\nthe cpuset.\n\n[akpm@linux-foundation.org: fix layout]\n[Lee.Schermerhorn@hp.com: Define stub numa_random() for !NUMA configuration]\nSigned-off-by: Jack Steiner \u003csteiner@sgi.com\u003e\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Jack Steiner \u003csteiner@sgi.com\u003e\nCc: Robin Holt \u003cholt@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "6adef3ebe570bcde67fd6c16101451ddde5712b5",
      "tree": "0f60e2a4d01850ae33aee6cefc7a59845ede89a0",
      "parents": [
        "2c488db27b614816024e7994117f599337de0f34"
      ],
      "author": {
        "name": "Jack Steiner",
        "email": "steiner@sgi.com",
        "time": "Wed May 26 14:42:49 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:44 2010 -0700"
      },
      "message": "cpusets: new round-robin rotor for SLAB allocations\n\nWe have observed several workloads running on multi-node systems where\nmemory is assigned unevenly across the nodes in the system.  There are\nnumerous reasons for this but one is the round-robin rotor in\ncpuset_mem_spread_node().\n\nFor example, a simple test that writes a multi-page file will allocate\npages on nodes 0 2 4 6 ...  Odd nodes are skipped.  (Sometimes it\nallocates on odd nodes \u0026 skips even nodes).\n\nAn example is shown below.  The program \"lfile\" writes a file consisting\nof 10 pages.  The program then mmaps the file \u0026 uses get_mempolicy(...,\nMPOL_F_NODE) to determine the nodes where the file pages were allocated.\nThe output is shown below:\n\n\t# ./lfile\n\t allocated on nodes: 2 4 6 0 1 2 6 0 2\n\nThere is a single rotor that is used for allocating both file pages \u0026 slab\npages.  Writing the file allocates both a data page \u0026 a slab page\n(buffer_head).  This advances the RR rotor 2 nodes for each page\nallocated.\n\nA quick confirmation seems to confirm this is the cause of the uneven\nallocation:\n\n\t# echo 0 \u003e/dev/cpuset/memory_spread_slab\n\t# ./lfile\n\t allocated on nodes: 6 7 8 9 0 1 2 3 4 5\n\nThis patch introduces a second rotor that is used for slab allocations.\n\nSigned-off-by: Jack Steiner \u003csteiner@sgi.com\u003e\nAcked-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Jack Steiner \u003csteiner@sgi.com\u003e\nCc: Robin Holt \u003cholt@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "907860ed381a31b0102f362df67c1c5cae6ef050",
      "tree": "4f47a6fe898b1f45da505fc0c27d98e66d42aa46",
      "parents": [
        "ac39cf8cb86c45eeac6a592ce0d58f9021a97235"
      ],
      "author": {
        "name": "Kirill A. Shutemov",
        "email": "kirill@shutemov.name",
        "time": "Wed May 26 14:42:46 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu May 27 09:12:44 2010 -0700"
      },
      "message": "cgroups: make cftype.unregister_event() void-returning\n\nSince we are unable to handle an error returned by\ncftype.unregister_event() properly, let\u0027s make the callback\nvoid-returning.\n\nmem_cgroup_unregister_event() has been rewritten to be a \"never fail\"\nfunction.  On mem_cgroup_usage_register_event() we save old buffer for\nthresholds array and reuse it in mem_cgroup_usage_unregister_event() to\navoid allocation.\n\nSigned-off-by: Kirill A. Shutemov \u003ckirill@shutemov.name\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Phil Carmody \u003cext-phil.2.carmody@nokia.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "174bd1994ec67a6e6191c4ed8e5dac17fa221b84",
      "tree": "1f1d80d40787dddff4a0b8bc63e70ad2c2981c5c",
      "parents": [
        "2abfb9e1d470f7082e5e20e4b11a271a0124211b"
      ],
      "author": {
        "name": "Stanislaw Gruszka",
        "email": "stf_xl@wp.pl",
        "time": "Tue May 25 23:49:12 2010 +0200"
      },
      "committer": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Wed May 26 16:15:37 2010 +0200"
      },
      "message": "hrtimer: Avoid double seqlock\n\nhrtimer_get_softirq_time() has it\u0027s own xtime lock protection, so it\u0027s\nsafe to use plain __current_kernel_time() and avoid the double seqlock\nloop.\n\nSigned-off-by: Stanislaw Gruszka \u003cstf_xl@wp.pl\u003e\nLKML-Reference: \u003c20100525214912.GA1934@r2bh72.net.upc.cz\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n\n"
    },
    {
      "commit": "2abfb9e1d470f7082e5e20e4b11a271a0124211b",
      "tree": "1f8d81f07099bbdf16486570855d130bcffa789d",
      "parents": [
        "8e63d7795e30b4091e303cc8c060509bd8eea742"
      ],
      "author": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Wed May 26 16:07:13 2010 +0200"
      },
      "committer": {
        "name": "Thomas Gleixner",
        "email": "tglx@linutronix.de",
        "time": "Wed May 26 16:07:13 2010 +0200"
      },
      "message": "timers: Move local variable into else section\n\nFix nit-picking coding style detail.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n"
    },
    {
      "commit": "b1cdc4670b9508fcd47a15fbd12f70d269880b37",
      "tree": "fea9e2650170886d539488f8b1e064f6ca60ad36",
      "parents": [
        "ce7d0226198aac42ed311dd2783232adc16b296d",
        "f925b1303e0672effc78547353bd2ddfe11f5b5f"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue May 25 16:59:51 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue May 25 16:59:51 2010 -0700"
      },
      "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (63 commits)\n  drivers/net/usb/asix.c: Fix pointer cast.\n  be2net: Bug fix to avoid disabling bottom half during firmware upgrade.\n  proc_dointvec: write a single value\n  hso: add support for new products\n  Phonet: fix potential use-after-free in pep_sock_close()\n  ath9k: remove VEOL support for ad-hoc\n  ath9k: change beacon allocation to prefer the first beacon slot\n  sock.h: fix kernel-doc warning\n  cls_cgroup: Fix build error when built-in\n  macvlan: do proper cleanup in macvlan_common_newlink() V2\n  be2net: Bug fix in init code in probe\n  net/dccp: expansion of error code size\n  ath9k: Fix rx of mcast/bcast frames in PS mode with auto sleep\n  wireless: fix sta_info.h kernel-doc warnings\n  wireless: fix mac80211.h kernel-doc warnings\n  iwlwifi: testing the wrong variable in iwl_add_bssid_station()\n  ath9k_htc: rare leak in ath9k_hif_usb_alloc_tx_urbs()\n  ath9k_htc: dereferencing before check in hif_usb_tx_cb()\n  rt2x00: Fix rt2800usb TX descriptor writing.\n  rt2x00: Fix failed SLEEP-\u003eAWAKE and AWAKE-\u003eSLEEP transitions.\n  ...\n"
    }
  ],
  "next": "218ce7351413b8287a80fab1d7b94906a5559f01"
}