)]}' { "log": [ { "commit": "158e0a2d1b3cffed8b46cbc56393a1394672ef79", "tree": "a044d53137609fdfc8c1afdde366b3e205c96eda", "parents": [ "73045c47b6facbdf4656e6763c8cb469de4337e2" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Tue Aug 10 18:03:00 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Aug 11 08:59:19 2010 -0700" }, "message": "memcg: use find_lock_task_mm() in memory cgroups oom\n\nWhen the OOM killer scans task, it check a task is under memcg or\nnot when it\u0027s called via memcg\u0027s context.\n\nBut, as Oleg pointed out, a thread group leader may have NULL -\u003emm\nand task_in_mem_cgroup() may do wrong decision. We have to use\nfind_lock_task_mm() in memcg as generic OOM-Killer does.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@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": "a63d83f427fbce97a6cea0db2e64b0eb8435cd10", "tree": "8ac229cdf6e2289d97e82e35774057106fe7f4a2", "parents": [ "74bcbf40546bb7500f2a7ba4ff3cc056a6bd004a" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Aug 09 17:19:46 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:45:02 2010 -0700" }, "message": "oom: badness heuristic rewrite\n\nThis a complete rewrite of the oom killer\u0027s badness() heuristic which is\nused to determine which task to kill in oom conditions. The goal is to\nmake it as simple and predictable as possible so the results are better\nunderstood and we end up killing the task which will lead to the most\nmemory freeing while still respecting the fine-tuning from userspace.\n\nInstead of basing the heuristic on mm-\u003etotal_vm for each task, the task\u0027s\nrss and swap space is used instead. This is a better indication of the\namount of memory that will be freeable if the oom killed task is chosen\nand subsequently exits. This helps specifically in cases where KDE or\nGNOME is chosen for oom kill on desktop systems instead of a memory\nhogging task.\n\nThe baseline for the heuristic is a proportion of memory that each task is\ncurrently using in memory plus swap compared to the amount of \"allowable\"\nmemory. \"Allowable,\" in this sense, means the system-wide resources for\nunconstrained oom conditions, the set of mempolicy nodes, the mems\nattached to current\u0027s cpuset, or a memory controller\u0027s limit. The\nproportion is given on a scale of 0 (never kill) to 1000 (always kill),\nroughly meaning that if a task has a badness() score of 500 that the task\nconsumes approximately 50% of allowable memory resident in RAM or in swap\nspace.\n\nThe proportion is always relative to the amount of \"allowable\" memory and\nnot the total amount of RAM systemwide so that mempolicies and cpusets may\noperate in isolation; they shall not need to know the true size of the\nmachine on which they are running if they are bound to a specific set of\nnodes or mems, respectively.\n\nRoot tasks are given 3% extra memory just like __vm_enough_memory()\nprovides in LSMs. In the event of two tasks consuming similar amounts of\nmemory, it is generally better to save root\u0027s task.\n\nBecause of the change in the badness() heuristic\u0027s baseline, it is also\nnecessary to introduce a new user interface to tune it. It\u0027s not possible\nto redefine the meaning of /proc/pid/oom_adj with a new scale since the\nABI cannot be changed for backward compatability. Instead, a new tunable,\n/proc/pid/oom_score_adj, is added that ranges from -1000 to +1000. It may\nbe used to polarize the heuristic such that certain tasks are never\nconsidered for oom kill while others may always be considered. The value\nis added directly into the badness() score so a value of -500, for\nexample, means to discount 50% of its memory consumption in comparison to\nother tasks either on the system, bound to the mempolicy, in the cpuset,\nor sharing the same memory controller.\n\n/proc/pid/oom_adj is changed so that its meaning is rescaled into the\nunits used by /proc/pid/oom_score_adj, and vice versa. Changing one of\nthese per-task tunables will rescale the value of the other to an\nequivalent meaning. Although /proc/pid/oom_adj was originally defined as\na bitshift on the badness score, it now shares the same linear growth as\n/proc/pid/oom_score_adj but with different granularity. This is required\nso the ABI is not broken with userspace applications and allows oom_adj to\nbe deprecated for future removal.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "cef1d3523d33ebc35fc29e454b1f4bab953fabbf", "tree": "3688cf9e7c3b1bd4e1d473d79fd1a959bd4306fb", "parents": [ "93b43fa55088fe977503a156d1097cc2055449a2" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Aug 09 17:19:42 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:45:02 2010 -0700" }, "message": "oom: multi threaded process coredump don\u0027t make deadlock\n\nOleg pointed out current PF_EXITING check is wrong. Because PF_EXITING\nis per-thread flag, not per-process flag. He said,\n\n Two threads, group-leader L and its sub-thread T. T dumps the code.\n In this case both threads have -\u003emm !\u003d NULL, L has PF_EXITING.\n\n The first problem is, select_bad_process() always return -1 in this\n case (even if the caller is T, this doesn\u0027t matter).\n\n The second problem is that we should add TIF_MEMDIE to T, not L.\n\nI think we can remove this dubious PF_EXITING check. but as first step,\nThis patch add the protection of multi threaded issue.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.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": "93b43fa55088fe977503a156d1097cc2055449a2", "tree": "32c688e20c3ac9b30edd9c240c98f2f779b20e67", "parents": [ "19b4586cd9c8ed642798902e55c6f61ed576ad93" ], "author": { "name": "Luis Claudio R. Goncalves", "email": "lclaudio@uudg.org", "time": "Mon Aug 09 17:19:41 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:45:02 2010 -0700" }, "message": "oom: give the dying task a higher priority\n\nIn a system under heavy load it was observed that even after the\noom-killer selects a task to die, the task may take a long time to die.\n\nRight after sending a SIGKILL to the task selected by the oom-killer this\ntask has its priority increased so that it can exit() soon, freeing\nmemory. That is accomplished by:\n\n /*\n * We give our sacrificial lamb high priority and access to\n * all the memory it needs. That way it should be able to\n * exit() and clear out its resources quickly...\n */\n \tp-\u003ert.time_slice \u003d HZ;\n \tset_tsk_thread_flag(p, TIF_MEMDIE);\n\nIt sounds plausible giving the dying task an even higher priority to be\nsure it will be scheduled sooner and free the desired memory. It was\nsuggested on LKML using SCHED_FIFO:1, the lowest RT priority so that this\ntask won\u0027t interfere with any running RT task.\n\nIf the dying task is already an RT task, leave it untouched. Another good\nsuggestion, implemented here, was to avoid boosting the dying task\npriority in case of mem_cgroup OOM.\n\nSigned-off-by: Luis Claudio R. Goncalves \u003clclaudio@uudg.org\u003e\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\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": "19b4586cd9c8ed642798902e55c6f61ed576ad93", "tree": "9db6c100cbb1337b584e0b7011ee1c736a210cd0", "parents": [ "df1090a8dda40b6e11d8cd09e8fc900cfe913b38" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Aug 09 17:19:39 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:45:02 2010 -0700" }, "message": "oom: remove child-\u003emm check from oom_kill_process()\n\nThe current \"child-\u003emm \u003d\u003d p-\u003emm\" check prevents selection of vfork()ed\ntask. But we don\u0027t have any reason to don\u0027t consider vfork().\n\nRemoved.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\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": "df1090a8dda40b6e11d8cd09e8fc900cfe913b38", "tree": "9bc8a81f66a0a3a8c29685fba7389378fe9f768c", "parents": [ "a96cfd6e9176ad442233001b7d15e9ed42234320" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Aug 09 17:19:39 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:45:01 2010 -0700" }, "message": "oom: cleanup has_intersects_mems_allowed()\n\npresently has_intersects_mems_allowed() has own thread iterate logic, but\nit should use while_each_thread().\n\nIt slightly improve the code readability.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\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": "a96cfd6e9176ad442233001b7d15e9ed42234320", "tree": "6aa70841f3f2c3ff39a75d0014b9a235810ccd08", "parents": [ "113e27f36dff9895049df324f292474854750d21" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Aug 09 17:19:38 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:45:01 2010 -0700" }, "message": "oom: move OOM_DISABLE check from oom_kill_task to out_of_memory()\n\nPresently if oom_kill_allocating_task is enabled and current have\nOOM_DISABLED, following printk in oom_kill_process is called twice.\n\n pr_err(\"%s: Kill process %d (%s) score %lu or sacrifice child\\n\",\n message, task_pid_nr(p), p-\u003ecomm, points);\n\nSo, OOM_DISABLE check should be more early.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\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": "113e27f36dff9895049df324f292474854750d21", "tree": "5e4e0bcee4d26ff15123d10d7d86db1eb1c382c8", "parents": [ "26ebc984913b6a8d86d724b3a79d2ed4ed574612" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Aug 09 17:19:37 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:45:01 2010 -0700" }, "message": "oom: kill duplicate OOM_DISABLE check\n\nselect_bad_process() and badness() have the same OOM_DISABLE check. This\npatch kills one.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\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": "26ebc984913b6a8d86d724b3a79d2ed4ed574612", "tree": "9d293c6f8b1bc5120beaa173590dcd83cd0e2eb0", "parents": [ "f88ccad5886d5a864b8b0d48c666ee9998dec53f" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Aug 09 17:19:37 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:45:01 2010 -0700" }, "message": "oom: /proc/\u003cpid\u003e/oom_score treat kernel thread honestly\n\nIf a kernel thread is using use_mm(), badness() returns a positive value.\nThis is not a big issue because caller take care of it correctly. But\nthere is one exception, /proc/\u003cpid\u003e/oom_score calls badness() directly and\ndoesn\u0027t care that the task is a regular process.\n\nAnother example, /proc/1/oom_score return !0 value. But it\u0027s unkillable.\nThis incorrectness makes administration a little confusing.\n\nThis patch fixes it.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\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": "f88ccad5886d5a864b8b0d48c666ee9998dec53f", "tree": "fc6da2064c660a270cff82bb2f97f21ce537a369", "parents": [ "ab290adbaf8f46770f014ea87968de5baca29c30" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Aug 09 17:19:36 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:45:01 2010 -0700" }, "message": "oom: oom_kill_process() needs to check that p is unkillable\n\nWhen oom_kill_allocating_task is enabled, an argument task of\noom_kill_process is not selected by select_bad_process(), It\u0027s just\nout_of_memory() caller task. It mean the task can be unkillable. check\nit first.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\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": "ab290adbaf8f46770f014ea87968de5baca29c30", "tree": "e6d9673a76ed7804d0b3ff858c2ac401971c1560", "parents": [ "2c5ea53ce46ebb232e0d9a475fdd2b166d2a516b" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Aug 09 17:19:35 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:45:01 2010 -0700" }, "message": "oom: make oom_unkillable_task() helper function\n\nPresently we have the same task check in two places. Unify it.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\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": "2c5ea53ce46ebb232e0d9a475fdd2b166d2a516b", "tree": "0dc0883ee29201600ec3950142d69f9860af2527", "parents": [ "7c59aec830c7ed6c745bd513982cee3563ed20c1" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Aug 09 17:19:34 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:45:01 2010 -0700" }, "message": "oom: oom_kill_process() doesn\u0027t select kthread child\n\nPresently select_bad_process() has a PF_KTHREAD check, but\noom_kill_process doesn\u0027t. It mean oom_kill_process() may choose wrong\ntask, especially, when the child are using use_mm().\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\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": "7c59aec830c7ed6c745bd513982cee3563ed20c1", "tree": "f06d2c626d0ab0ff2f9880d98a50e60be4af7816", "parents": [ "1489fa14cb757b496c8fa2b63097dbcee6690695" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Aug 09 17:19:33 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:45:00 2010 -0700" }, "message": "oom: don\u0027t try to kill oom_unkillable child\n\nPresently, badness() doesn\u0027t care about either CPUSET nor mempolicy. Then\nif the victim child process have disjoint nodemask, OOM Killer might kill\ninnocent process.\n\nThis patch fixes it.\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\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": "0aad4b3124850e85fe54e610802f0917ce46a1ae", "tree": "ebba56659dab4e285b87341d7639fda7a2db81e9", "parents": [ "f44200320b10c76003101dee21c5f961e80faf0b" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Aug 09 17:18:59 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:57 2010 -0700" }, "message": "oom: fold __out_of_memory into out_of_memory\n\n__out_of_memory() only has a single caller, so fold it into\nout_of_memory() and add a comment about locking for its call to\noom_kill_process().\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.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": "f44200320b10c76003101dee21c5f961e80faf0b", "tree": "4c187867337cee9c02e08d926866669f27e4018c", "parents": [ "ff321feac22313cf53ffceb69224b09ac19ff22b" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Aug 09 17:18:58 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:57 2010 -0700" }, "message": "oom: remove constraint argument from select_bad_process and __out_of_memory\n\nselect_bad_process() and __out_of_memory() doe not need their enum\noom_constraint arguments: it\u0027s possible to pass a NULL nodemask if\nconstraint \u003d\u003d CONSTRAINT_MEMORY_POLICY in the caller, out_of_memory().\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.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": "ff321feac22313cf53ffceb69224b09ac19ff22b", "tree": "101400fdee395944c2fa5f1f2b45cac54a5c1088", "parents": [ "b940fd703572f7f9e5f894c682c91c3cbd84c11e" ], "author": { "name": "Minchan Kim", "email": "minchan.kim@gmail.com", "time": "Mon Aug 09 17:18:57 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:57 2010 -0700" }, "message": "mm: rename try_set_zone_oom() to try_set_zonelist_oom()\n\nWe have been used naming try_set_zone_oom and clear_zonelist_oom.\nThe role of functions is to lock of zonelist for preventing parallel\nOOM. So clear_zonelist_oom makes sense but try_set_zone_oome is rather\nawkward and unmatched with clear_zonelist_oom.\n\nLet\u0027s change it with try_set_zonelist_oom.\n\nSigned-off-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.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": "b940fd703572f7f9e5f894c682c91c3cbd84c11e", "tree": "cbb1f23073373ba1c425762f38f6f0bf9decf278", "parents": [ "8e4228e1edb922afa83366803a1e5b3fa8e987c2" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Aug 09 17:18:57 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:57 2010 -0700" }, "message": "oom: remove unnecessary code and cleanup\n\nRemove the redundancy in __oom_kill_task() since:\n\n - init can never be passed to this function: it will never be PF_EXITING\n or selectable from select_bad_process(), and\n\n - it will never be passed a task from oom_kill_task() without an -\u003emm\n and we\u0027re unconcerned about detachment from exiting tasks, there\u0027s no\n reason to protect them against SIGKILL or access to memory reserves.\n\nAlso moves the kernel log message to a higher level since the verbosity is\nnot always emitted here; we need not print an error message if an exiting\ntask is given a longer timeslice.\n\n__oom_kill_task() only has a single caller, so it can be merged into that\nfunction at the same time.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.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": "e365893236ca78fa1fe2482ccbdc30e9abde6027", "tree": "36caf9177f592f0d3a93593b6a569be239aebf91", "parents": [ "309ed882508cc471320ff79265e7340774d6746c" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Aug 09 17:18:55 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:57 2010 -0700" }, "message": "oom: remove special handling for pagefault ooms\n\nIt is possible to remove the special pagefault oom handler by simply oom\nlocking all system zones and then calling directly into out_of_memory().\n\nAll populated zones must have ZONE_OOM_LOCKED set, otherwise there is a\nparallel oom killing in progress that will lead to eventual memory freeing\nso it\u0027s not necessary to needlessly kill another task. The context in\nwhich the pagefault is allocating memory is unknown to the oom killer, so\nthis is done on a system-wide level.\n\nIf a task has already been oom killed and hasn\u0027t fully exited yet, this\nwill be a no-op since select_bad_process() recognizes tasks across the\nsystem with TIF_MEMDIE set.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.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": "309ed882508cc471320ff79265e7340774d6746c", "tree": "28321b30bc420c62554ef6a705ec4bc70651b473", "parents": [ "03668b3ceb0c7a95e09f1b6169f5270ffc1a19f6" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Aug 09 17:18:54 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:57 2010 -0700" }, "message": "oom: extract panic helper function\n\nThere are various points in the oom killer where the kernel must determine\nwhether to panic or not. It\u0027s better to extract this to a helper function\nto remove all the confusion as to its semantics.\n\nAlso fix a call to dump_header() where tasklist_lock is not read- locked,\nas required.\n\nThere\u0027s no functional change with this patch.\n\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.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": "ad915c432eccb482427c1bbd77c74e6f7bfe60b3", "tree": "d93b536c48773527c8ae0312d6dcf45d57dd1b89", "parents": [ "6f48d0ebd907ae419387f27b602ee98870cfa7bb" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Aug 09 17:18:53 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:56 2010 -0700" }, "message": "oom: enable oom tasklist dump by default\n\nThe oom killer tasklist dump, enabled with the oom_dump_tasks sysctl, is\nvery helpful information in diagnosing why a user\u0027s task has been killed.\nIt emits useful information such as each eligible thread\u0027s memory usage\nthat can determine why the system is oom, so it should be enabled by\ndefault.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.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": "6f48d0ebd907ae419387f27b602ee98870cfa7bb", "tree": "355bd8b616f5a78d8adabe5b9631d7aad970dbaa", "parents": [ "5e9d834a0e0c0485dfa487281ab9650fc37a3bb5" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Aug 09 17:18:52 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:56 2010 -0700" }, "message": "oom: select task from tasklist for mempolicy ooms\n\nThe oom killer presently kills current whenever there is no more memory\nfree or reclaimable on its mempolicy\u0027s nodes. There is no guarantee that\ncurrent is a memory-hogging task or that killing it will free any\nsubstantial amount of memory, however.\n\nIn such situations, it is better to scan the tasklist for nodes that are\nallowed to allocate on current\u0027s set of nodes and kill the task with the\nhighest badness() score. This ensures that the most memory-hogging task,\nor the one configured by the user with /proc/pid/oom_adj, is always\nselected in such scenarios.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.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": "5e9d834a0e0c0485dfa487281ab9650fc37a3bb5", "tree": "b93cf4fd46b50b18f3fc118f1739a71dbdd8f340", "parents": [ "6cf86ac6f36b638459a9a6c2576d5e655d41d451" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Aug 09 17:18:51 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:56 2010 -0700" }, "message": "oom: sacrifice child with highest badness score for parent\n\nWhen a task is chosen for oom kill, the oom killer first attempts to\nsacrifice a child not sharing its parent\u0027s memory instead. Unfortunately,\nthis often kills in a seemingly random fashion based on the ordering of\nthe selected task\u0027s child list. Additionally, it is not guaranteed at all\nto free a large amount of memory that we need to prevent additional oom\nkilling in the very near future.\n\nInstead, we now only attempt to sacrifice the worst child not sharing its\nparent\u0027s memory, if one exists. The worst child is indicated with the\nhighest badness() score. This serves two advantages: we kill a\nmemory-hogging task more often, and we allow the configurable\n/proc/pid/oom_adj value to be considered as a factor in which child to\nkill.\n\nReviewers may observe that the previous implementation would iterate\nthrough the children and attempt to kill each until one was successful and\nthen the parent if none were found while the new code simply kills the\nmost memory-hogging task or the parent. Note that the only time\noom_kill_task() fails, however, is when a child does not have an mm or has\na /proc/pid/oom_adj of OOM_DISABLE. badness() returns 0 for both cases,\nso the final oom_kill_task() will always succeed.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.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": "6cf86ac6f36b638459a9a6c2576d5e655d41d451", "tree": "177ae58393bfbc5a87eb64178d426e2ba4c95871", "parents": [ "4358997ae38a1901498d128d6508119d9f318b36" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Aug 09 17:18:50 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:56 2010 -0700" }, "message": "oom: filter tasks not sharing the same cpuset\n\nTasks that do not share the same set of allowed nodes with the task that\ntriggered the oom should not be considered as candidates for oom kill.\n\nTasks in other cpusets with a disjoint set of mems would be unfairly\npenalized otherwise because of oom conditions elsewhere; an extreme\nexample could unfairly kill all other applications on the system if a\nsingle task in a user\u0027s cpuset sets itself to OOM_DISABLE and then uses\nmore memory than allowed.\n\nKilling tasks outside of current\u0027s cpuset rarely would free memory for\ncurrent anyway. To use a sane heuristic, we must ensure that killing a\ntask would likely free memory for current and avoid needlessly killing\nothers at all costs just because their potential memory freeing is\nunknown. It is better to kill current than another task needlessly.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.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": "4358997ae38a1901498d128d6508119d9f318b36", "tree": "0c5a47808790e80a754b44aebe82c5c683811788", "parents": [ "7b98c2e402eaa1f2beec18b1bde17f74948a19db" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Aug 09 17:18:49 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:56 2010 -0700" }, "message": "oom: avoid sending exiting tasks a SIGKILL\n\nIt\u0027s unnecessary to SIGKILL a task that is already PF_EXITING and can\nactually cause a NULL pointer dereference of the sighand if it has already\nbeen detached. Instead, simply set TIF_MEMDIE so it has access to memory\nreserves and can quickly exit as the comment implies.\n\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.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": "7b98c2e402eaa1f2beec18b1bde17f74948a19db", "tree": "a0d3920f84e981cca5be386e2cc5a6320c4d8bdc", "parents": [ "c81fac5cb8c92b8b4795ac250a46c7514d1fce06" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Aug 09 17:18:48 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:56 2010 -0700" }, "message": "oom: give current access to memory reserves if it has been killed\n\nIt\u0027s possible to livelock the page allocator if a thread has mm-\u003emmap_sem\nand fails to make forward progress because the oom killer selects another\nthread sharing the same -\u003emm to kill that cannot exit until the semaphore\nis dropped.\n\nThe oom killer will not kill multiple tasks at the same time; each oom\nkilled task must exit before another task may be killed. Thus, if one\nthread is holding mm-\u003emmap_sem and cannot allocate memory, all threads\nsharing the same -\u003emm are blocked from exiting as well. In the oom kill\ncase, that means the thread holding mm-\u003emmap_sem will never free\nadditional memory since it cannot get access to memory reserves and the\nthread that depends on it with access to memory reserves cannot exit\nbecause it cannot acquire the semaphore. Thus, the page allocators\nlivelocks.\n\nWhen the oom killer is called and current happens to have a pending\nSIGKILL, this patch automatically gives it access to memory reserves and\nreturns. Upon returning to the page allocator, its allocation will\nhopefully succeed so it can quickly exit and free its memory. If not, the\npage allocator will fail the allocation if it is not __GFP_NOFAIL.\n\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.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": "c81fac5cb8c92b8b4795ac250a46c7514d1fce06", "tree": "2f2577d6813d0472b23359bcda8223edf0d7b396", "parents": [ "74ab7f1d3f22ccb02f8b14f1f2375416b1ab0adb" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Aug 09 17:18:47 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:56 2010 -0700" }, "message": "oom: dump_tasks use find_lock_task_mm too fix\n\nWhen find_lock_task_mm() returns a thread other than p in dump_tasks(),\nits name should be displayed instead. This is the thread that will be\ntargeted by the oom killer, not its mm-less parent.\n\nThis also allows us to safely dereference task-\u003ecomm without needing\nget_task_comm().\n\nWhile we\u0027re here, remove the cast on task_cpu(task) as Andrew suggested.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\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": "74ab7f1d3f22ccb02f8b14f1f2375416b1ab0adb", "tree": "94f7e6b0e77fe11f200941f97d1fc895dc950fde", "parents": [ "c55db95788a2a55a77f5a3ced1e59578710440b2" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Aug 09 17:18:46 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:56 2010 -0700" }, "message": "oom: improve commentary in dump_tasks()\n\nThe comments in dump_tasks() should be updated to be more clear about why\ntasks are filtered and how they are filtered by its argument.\n\nAn unnecessary comment concerning a check for is_global_init() is removed\nsince it isn\u0027t of importance.\n\nSuggested-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\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": "c55db95788a2a55a77f5a3ced1e59578710440b2", "tree": "275a0c97bfe408ea926dfe14864e476d719859e9", "parents": [ "dd8e8f405ca386c7ce7cbb996ccd985d283b0e03" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Aug 09 17:18:46 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:56 2010 -0700" }, "message": "oom: dump_tasks use find_lock_task_mm too\n\ndump_task() should use find_lock_task_mm() too. It is necessary for\nprotecting task-exiting race.\n\ndump_tasks() currently filters any task that does not have an attached\n-\u003emm since it incorrectly assumes that it must either be in the process of\nexiting and has detached its memory or that it\u0027s a kernel thread;\nmultithreaded tasks may actually have subthreads that have a valid -\u003emm\npointer and thus those threads should actually be displayed. This change\nfinds those threads, if they exist, and emit their information along with\nthe rest of the candidate tasks for kill.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\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": "dd8e8f405ca386c7ce7cbb996ccd985d283b0e03", "tree": "7863585871d44c0272eb0b93ee909392ee85eb99", "parents": [ "b52279406e77be711c068f9a8e970ea6471e089c" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Aug 09 17:18:45 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:55 2010 -0700" }, "message": "oom: introduce find_lock_task_mm() to fix !mm false positives\n\nAlmost all -\u003emm \u003d\u003d NULL checks in oom_kill.c are wrong.\n\nThe current code assumes that the task without -\u003emm has already released\nits memory and ignores the process. However this is not necessarily true\nwhen this process is multithreaded, other live sub-threads can use this\n-\u003emm.\n\n- Remove the \"if (!p-\u003emm)\" check in select_bad_process(), it is\n just wrong.\n\n- Add the new helper, find_lock_task_mm(), which finds the live\n thread which uses the memory and takes task_lock() to pin -\u003emm\n\n- change oom_badness() to use this helper instead of just checking\n -\u003emm !\u003d NULL.\n\n- As David pointed out, select_bad_process() must never choose the\n task without -\u003emm, but no matter what oom_badness() returns the\n task can be chosen if nothing else has been found yet.\n\n Change oom_badness() to return int, change it to return -1 if\n find_lock_task_mm() fails, and change select_bad_process() to\n check points \u003e\u003d 0.\n\nNote! This patch is not enough, we need more changes.\n\n\t- oom_badness() was fixed, but oom_kill_task() still ignores\n\t the task without -\u003emm\n\n\t- oom_forkbomb_penalty() should use find_lock_task_mm() too,\n\t and it also needs other changes to actually find the first\n\t first-descendant children\n\nThis will be addressed later.\n\n[kosaki.motohiro@jp.fujitsu.com: use in badness(), __oom_kill_task()]\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.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": "b52279406e77be711c068f9a8e970ea6471e089c", "tree": "5f44a8af51ccc30847b1d969e0bd36205902d3fb", "parents": [ "455c0e5fb03b67fa62bd12e3abe3fa484b9960c5" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Aug 09 17:18:44 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:55 2010 -0700" }, "message": "oom: PF_EXITING check should take mm into account\n\nselect_bad_process() checks PF_EXITING to detect the task which is going\nto release its memory, but the logic is very wrong.\n\n\t- a single process P with the dead group leader disables\n\t select_bad_process() completely, it will always return\n\t ERR_PTR() while P can live forever\n\n\t- if the PF_EXITING task has already released its -\u003emm\n\t it doesn\u0027t make sense to expect it is goiing to free\n\t more memory (except task_struct/etc)\n\nChange the code to ignore the PF_EXITING tasks without -\u003emm.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.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": "455c0e5fb03b67fa62bd12e3abe3fa484b9960c5", "tree": "082cbecb8927e1c8e0c2cea5d5639e9c8f62eafe", "parents": [ "a9877cc2937889e5669114f28612b494384152a4" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Aug 09 17:18:43 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:44:55 2010 -0700" }, "message": "oom: check PF_KTHREAD instead of !mm to skip kthreads\n\nselect_bad_process() thinks a kernel thread can\u0027t have -\u003emm !\u003d NULL, this\nis not true due to use_mm().\n\nChange the code to check PF_KTHREAD.\n\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "df64f81bb1e01cbef967a96642dacf208acb7e72", "tree": "accb54ac130b2ac52b3d8644cb6585cf9730975c", "parents": [ "dc10e281f5fc42e288ab979294d1d5dc9743ae1b" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Wed May 26 14:42:41 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 27 09:12:43 2010 -0700" }, "message": "memcg: make oom killer a no-op when no killable task can be found\n\nIt\u0027s pointless to try to kill current if select_bad_process() did not find\nan eligible task to kill in mem_cgroup_out_of_memory() since it\u0027s\nguaranteed that current is a member of the memcg that is oom and it is, by\ndefinition, unkillable.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5a0e3ad6af8660be21ca98a971cd00f331318c05", "tree": "5bfb7be11a03176a87296a43ac6647975c00a1d1", "parents": [ "ed391f4ebf8f701d3566423ce8f17e614cde9806" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Wed Mar 24 17:04:11 2010 +0900" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Mar 30 22:02:32 2010 +0900" }, "message": "include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h\n\npercpu.h is included by sched.h and module.h and thus ends up being\nincluded when building most .c files. percpu.h includes slab.h which\nin turn includes gfp.h making everything defined by the two files\nuniversally available and complicating inclusion dependencies.\n\npercpu.h -\u003e slab.h dependency is about to be removed. Prepare for\nthis change by updating users of gfp and slab facilities include those\nheaders directly instead of assuming availability. As this conversion\nneeds to touch large number of source files, the following script is\nused as the basis of conversion.\n\n http://userweb.kernel.org/~tj/misc/slabh-sweep.py\n\nThe script does the followings.\n\n* Scan files for gfp and slab usages and update includes such that\n only the necessary includes are there. ie. if only gfp is used,\n gfp.h, if slab is used, slab.h.\n\n* When the script inserts a new include, it looks at the include\n blocks and try to put the new include such that its order conforms\n to its surrounding. It\u0027s put in the include block which contains\n core kernel includes, in the same order that the rest are ordered -\n alphabetical, Christmas tree, rev-Xmas-tree or at the end if there\n doesn\u0027t seem to be any matching order.\n\n* If the script can\u0027t find a place to put a new include (mostly\n because the file doesn\u0027t have fitting include block), it prints out\n an error message indicating which .h file needs to be added to the\n file.\n\nThe conversion was done in the following steps.\n\n1. The initial automatic conversion of all .c files updated slightly\n over 4000 files, deleting around 700 includes and adding ~480 gfp.h\n and ~3000 slab.h inclusions. The script emitted errors for ~400\n files.\n\n2. Each error was manually checked. Some didn\u0027t need the inclusion,\n some needed manual addition while adding it to implementation .h or\n embedding .c file was more appropriate for others. This step added\n inclusions to around 150 files.\n\n3. The script was run again and the output was compared to the edits\n from #2 to make sure no file was left behind.\n\n4. Several build tests were done and a couple of problems were fixed.\n e.g. lib/decompress_*.c used malloc/free() wrappers around slab\n APIs requiring slab.h to be added manually.\n\n5. The script was run on all .h files but without automatically\n editing them as sprinkling gfp.h and slab.h inclusions around .h\n files could easily lead to inclusion dependency hell. Most gfp.h\n inclusion directives were ignored as stuff from gfp.h was usually\n wildly available and often used in preprocessor macros. Each\n slab.h inclusion directive was examined and added manually as\n necessary.\n\n6. percpu.h was updated not to include slab.h.\n\n7. Build test were done on the following configurations and failures\n were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my\n distributed build env didn\u0027t work with gcov compiles) and a few\n more options had to be turned off depending on archs to make things\n build (like ipr on powerpc/64 which failed due to missing writeq).\n\n * x86 and x86_64 UP and SMP allmodconfig and a custom test config.\n * powerpc and powerpc64 SMP allmodconfig\n * sparc and sparc64 SMP allmodconfig\n * ia64 SMP allmodconfig\n * s390 SMP allmodconfig\n * alpha SMP allmodconfig\n * um on x86_64 SMP allmodconfig\n\n8. percpu.h modifications were reverted so that it could be applied as\n a separate patch and serve as bisection point.\n\nGiven the fact that I had only a couple of failures from tests on step\n6, I\u0027m fairly confident about the coverage of this conversion patch.\nIf there is a breakage, it\u0027s likely to be something in one of the arch\nheaders which should be easily discoverable easily on most builds of\nthe specific arch.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nGuess-its-ok-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: Lee Schermerhorn \u003cLee.Schermerhorn@hp.com\u003e\n" }, { "commit": "867578cbccb0893cc14fc29c670f7185809c90d6", "tree": "e4d0cefac265fc64399223bc82ed714a88ebe20c", "parents": [ "0263c12c12ccc90edc9d856fa839f8936183e6d1" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Mar 10 15:22:39 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Mar 12 15:52:38 2010 -0800" }, "message": "memcg: fix oom kill behavior\n\nIn current page-fault code,\n\n\thandle_mm_fault()\n\t\t-\u003e ...\n\t\t-\u003e mem_cgroup_charge()\n\t\t-\u003e map page or handle error.\n\t-\u003e check return code.\n\nIf page fault\u0027s return code is VM_FAULT_OOM, page_fault_out_of_memory() is\ncalled. But if it\u0027s caused by memcg, OOM should have been already\ninvoked.\n\nThen, I added a patch: a636b327f731143ccc544b966cfd8de6cb6d72c6. That\npatch records last_oom_jiffies for memcg\u0027s sub-hierarchy and prevents\npage_fault_out_of_memory from being invoked in near future.\n\nBut Nishimura-san reported that check by jiffies is not enough when the\nsystem is terribly heavy.\n\nThis patch changes memcg\u0027s oom logic as.\n * If memcg causes OOM-kill, continue to retry.\n * remove jiffies check which is used now.\n * add memcg-oom-lock which works like perzone oom lock.\n * If current is killed(as a process), bypass charge.\n\nSomething more sophisticated can be added but this pactch does\nfundamental things.\nTODO:\n - add oom notifier\n - add permemcg disable-oom-kill flag and freezer at oom.\n - more chances for wake up oom waiter (when changing memory limit etc..)\n\nReviewed-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nTested-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "daaf1e68874c078a15ae6ae827751839c4d81739", "tree": "22ed2e28b1c4f0b714df680ffff6407e519c5c60", "parents": [ "1080d7a30304d03b1d9fd530aacd8aece2d702a2" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Mar 10 15:22:32 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Mar 12 15:52:37 2010 -0800" }, "message": "memcg: handle panic_on_oom\u003dalways case\n\nPresently, if panic_on_oom\u003d2, the whole system panics even if the oom\nhappend in some special situation (as cpuset, mempolicy....). Then,\npanic_on_oom\u003d2 means painc_on_oom_always.\n\nNow, memcg doesn\u0027t check panic_on_oom flag. This patch adds a check.\n\nBTW, how it\u0027s useful ?\n\nkdump+panic_on_oom\u003d2 is the last tool to investigate what happens in\noom-ed system. When a task is killed, the sysytem recovers and there will\nbe few hint to know what happnes. In mission critical system, oom should\nnever happen. Then, panic_on_oom\u003d2+kdump is useful to avoid next OOM by\nknowing precise information via snapshot.\n\nTODO:\n - For memcg, it\u0027s for isolate system\u0027s memory usage, oom-notiifer and\n freeze_at_oom (or rest_at_oom) should be implemented. Then, management\n daemon can do similar jobs (as kdump) or taking snapshot per cgroup.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nReviewed-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d559db086ff5be9bcc259e5aa50bf3d881eaf1d1", "tree": "aa968c8a4093234e4623a34c0415bf9d8683671c", "parents": [ "19b629f581320999ddb9f6597051b79cdb53459c" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Fri Mar 05 13:41:39 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Mar 06 11:26:23 2010 -0800" }, "message": "mm: clean up mm_counter\n\nPresently, per-mm statistics counter is defined by macro in sched.h\n\nThis patch modifies it to\n - defined in mm.h as inlinf functions\n - use array instead of macro\u0027s name creation.\n\nThis patch is for reducing patch size in future patch to modify\nimplementation of per-mm counter.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5a2d41961dd6815b874b5c0afec0ac96cd90eea4", "tree": "af3d153f9615d9c11feb378f7821c0f280012b52", "parents": [ "bee415ce427d1eab6cfb30221461c7d20cbf1903" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Mon Feb 22 12:44:14 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Feb 22 19:50:34 2010 -0800" }, "message": "memcg: fix oom killing a child process in an other cgroup\n\nPresently the oom-killer is memcg aware and it finds the worst process\nfrom processes under memcg(s) in oom. Then, it kills victim\u0027s child\nfirst.\n\nIt may kill a child in another cgroup and may not be any help for\nrecovery. And it will break the assumption users have.\n\nThis patch fixes it.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nReviewed-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d31f56dbf8bafaacb0c617f9a6f137498d5c7aed", "tree": "88d095c2208d27362e58ff7431407040ead9d848", "parents": [ "57f9fd7d25ac9a0d7e3a4ced580e780ab4524e3b" ], "author": { "name": "Daisuke Nishimura", "email": "nishimura@mxp.nes.nec.co.jp", "time": "Tue Dec 15 16:47:12 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Dec 16 07:20:07 2009 -0800" }, "message": "memcg: avoid oom-killing innocent task in case of use_hierarchy\n\ntask_in_mem_cgroup(), which is called by select_bad_process() to check\nwhether a task can be a candidate for being oom-killed from memcg\u0027s limit,\nchecks \"curr-\u003euse_hierarchy\"(\"curr\" is the mem_cgroup the task belongs\nto).\n\nBut this check return true(it\u0027s false positive) when:\n\n\t\u003csome path\u003e/aa\t\tuse_hierarchy \u003d\u003d 0\t\u003c- hitting limit\n\t \u003csome path\u003e/aa/00\tuse_hierarchy \u003d\u003d 1\t\u003c- the task belongs to\n\nThis leads to killing an innocent task in aa/00. This patch is a fix for\nthis bug. And this patch also fixes the arg for\nmem_cgroup_print_oom_info(). We should print information of mem_cgroup\nwhich the task being killed, not current, belongs to.\n\nSigned-off-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4365a5676fa3aa1d5ae6c90c22a0044f09ba584e", "tree": "5b9914ccbdcf2aa695473421e71f6299fbe78cef", "parents": [ "3b4798cbc13dd8d1150aa6377f97f0e11450a67d" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hioryu@jp.fujitsu.com", "time": "Tue Dec 15 16:45:33 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Dec 16 07:19:57 2009 -0800" }, "message": "oom-kill: fix NUMA constraint check with nodemask\n\nFix node-oriented allocation handling in oom-kill.c I myself think of this\nas a bugfix not as an ehnancement.\n\nIn these days, things are changed as\n - alloc_pages() eats nodemask as its arguments, __alloc_pages_nodemask().\n - mempolicy don\u0027t maintain its own private zonelists.\n (And cpuset doesn\u0027t use nodemask for __alloc_pages_nodemask())\n\nSo, current oom-killer\u0027s check function is wrong.\n\nThis patch does\n - check nodemask, if nodemask \u0026\u0026 nodemask doesn\u0027t cover all\n node_states[N_HIGH_MEMORY], this is CONSTRAINT_MEMORY_POLICY.\n - Scan all zonelist under nodemask, if it hits cpuset\u0027s wall\n this faiulre is from cpuset.\nAnd\n - modifies the caller of out_of_memory not to call oom if __GFP_THISNODE.\n This doesn\u0027t change \"current\" behavior. If callers use __GFP_THISNODE\n it should handle \"page allocation failure\" by itself.\n\n - handle __GFP_NOFAIL+__GFP_THISNODE path.\n This is something like a FIXME but this gfpmask is not used now.\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hioryu@jp.fujitsu.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3b4798cbc13dd8d1150aa6377f97f0e11450a67d", "tree": "3a805cae1557098ddd4386fd6117f4f0fde5123f", "parents": [ "8bea8672edfca7ec5f661cafb218f1205863b343" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Tue Dec 15 16:45:32 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Dec 16 07:19:57 2009 -0800" }, "message": "oom-kill: show virtual size and rss information of the killed process\n\nIn a typical oom analysis scenario, we frequently want to know whether the\nkilled process has a memory leak or not at the first step. This patch\nadds vsz and rss information to the oom log to help this analysis. To\nsave time for the debugging.\n\nexample:\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\nrsyslogd invoked oom-killer: gfp_mask\u003d0x201da, order\u003d0, oom_adj\u003d0\nPid: 1308, comm: rsyslogd Not tainted 2.6.32-rc6 #24\nCall Trace:\n[\u003cffffffff8132e35b\u003e] ?_spin_unlock+0x2b/0x40\n[\u003cffffffff810f186e\u003e] oom_kill_process+0xbe/0x2b0\n\n(snip)\n\n492283 pages non-shared\nOut of memory: kill process 2341 (memhog) score 527276 or a child\nKilled process 2341 (memhog) vsz:1054552kB, anon-rss:970588kB, file-rss:4kB\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\n ^\n |\n here\n\n[rientjes@google.com: fix race, add pid \u0026 comm to message]\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1b604d75bbb6e28628c5a95a433432973c33d581", "tree": "f5022972180a0dab66744eb6278ea57b869447e4", "parents": [ "5ce45962b26ae867e98e60177f62f9695b49a936" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Dec 14 17:57:47 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Dec 15 08:53:10 2009 -0800" }, "message": "oom: dump stack and VM state when oom killer panics\n\nThe oom killer header, including information such as the allocation order\nand gfp mask, current\u0027s cpuset and memory controller, call trace, and VM\nstate information is currently only shown when the oom killer has selected\na task to kill.\n\nThis information is omitted, however, when the oom killer panics either\nbecause of panic_on_oom sysctl settings or when no killable task was\nfound. It is still relevant to know crucial pieces of information such as\nthe allocation order and VM state when diagnosing such issues, especially\nat boot.\n\nThis patch displays the oom killer header whenever it panics so that bug\nreports can include pertinent information to debug the issue, if possible.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.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": "8c5cd6f3a1721085652da204d454af4f8b92eda2", "tree": "3fcb6f4cd7e5981c2713f05340ec931574768cff", "parents": [ "495789a51a91cb8c015d8d77fecbac1caf20b186" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Sep 21 17:03:15 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:39 2009 -0700" }, "message": "oom: oom_kill doesn\u0027t kill vfork parent (or child)\n\nCurrent oom_kill doesn\u0027t only kill the victim process, but also kill all\nthas shread the same mm. it mean vfork parent will be killed.\n\nThis is definitely incorrect. another process have another oom_adj. we\nshouldn\u0027t ignore their oom_adj (it might have OOM_DISABLE).\n\nfollowing caller hit the minefield.\n\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\n switch (constraint) {\n case CONSTRAINT_MEMORY_POLICY:\n oom_kill_process(current, gfp_mask, order, 0, NULL,\n \"No available memory (MPOL_BIND)\");\n break;\n\nNote: force_sig(SIGKILL) send SIGKILL to all thread in the process.\nWe don\u0027t need to care multi thread in here.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\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": "495789a51a91cb8c015d8d77fecbac1caf20b186", "tree": "ac2a71ed40ed84f5673326aa6bf7f278b54d989a", "parents": [ "28b83c5193e7ab951e402252278f2cc79dc4d298" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Sep 21 17:03:14 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:39 2009 -0700" }, "message": "oom: make oom_score to per-process value\n\noom-killer kills a process, not task. Then oom_score should be calculated\nas per-process too. it makes consistency more and makes speed up\nselect_bad_process().\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\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": "28b83c5193e7ab951e402252278f2cc79dc4d298", "tree": "10080e8d3957c2a03f8419ab44c9ecb0ffcdaee0", "parents": [ "f168e1b6390e2d79cf57e48e6ae6d9b0a9e2851a" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Sep 21 17:03:13 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:39 2009 -0700" }, "message": "oom: move oom_adj value from task_struct to signal_struct\n\nCurrently, OOM logic callflow is here.\n\n __out_of_memory()\n select_bad_process() for each task\n badness() calculate badness of one task\n oom_kill_process() search child\n oom_kill_task() kill target task and mm shared tasks with it\n\nexample, process-A have two thread, thread-A and thread-B and it have very\nfat memory and each thread have following oom_adj and oom_score.\n\n thread-A: oom_adj \u003d OOM_DISABLE, oom_score \u003d 0\n thread-B: oom_adj \u003d 0, oom_score \u003d very-high\n\nThen, select_bad_process() select thread-B, but oom_kill_task() refuse\nkill the task because thread-A have OOM_DISABLE. Thus __out_of_memory()\ncall select_bad_process() again. but select_bad_process() select the same\ntask. It mean kernel fall in livelock.\n\nThe fact is, select_bad_process() must select killable task. otherwise\nOOM logic go into livelock.\n\nAnd root cause is, oom_adj shouldn\u0027t be per-thread value. it should be\nper-process value because OOM-killer kill a process, not thread. Thus\nThis patch moves oomkilladj (now more appropriately named oom_adj) from\nstruct task_struct to struct signal_struct. it naturally prevent\nselect_bad_process() choose wrong task.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\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": "35451beecbd7c86ce3249d543594517a5fe9a0cd", "tree": "e72759e6e6fcd142ab85c607a9b3dd3e1c016eed", "parents": [ "a913e182ab9484308e870af37a14d372742d53b0" ], "author": { "name": "Hugh Dickins", "email": "hugh.dickins@tiscali.co.uk", "time": "Mon Sep 21 17:02:27 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:33 2009 -0700" }, "message": "ksm: unmerge is an origin of OOMs\n\nJust as the swapoff system call allocates many pages of RAM to various\nprocesses, perhaps triggering OOM, so \"echo 2 \u003e/sys/kernel/mm/ksm/run\"\n(unmerge) is liable to allocate many pages of RAM to various processes,\nperhaps triggering OOM; and each is normally run from a modest admin\nprocess (swapoff or shell), easily repeated until it succeeds.\n\nSo treat unmerge_and_remove_all_rmap_items() in the same way that we treat\ntry_to_unuse(): generalize PF_SWAPOFF to PF_OOM_ORIGIN, and bracket both\nwith that, to ask the OOM killer to kill them first, to prevent them from\nspawning more and more OOM kills.\n\nSigned-off-by: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\u003e\nAcked-by: Izik Eidus \u003cieidus@redhat.com\u003e\nCc: Andrea Arcangeli \u003caarcange@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": "0753ba01e126020bf0f8150934903b48935b697d", "tree": "fbfd7e2d0abbe724a8c5e0e17fb9af522ed2e097", "parents": [ "89a4eb4b66e8f4d395e14a14d262dac4d6ca52f0" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Tue Aug 18 14:11:10 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Aug 18 16:31:13 2009 -0700" }, "message": "mm: revert \"oom: move oom_adj value\"\n\nThe commit 2ff05b2b (oom: move oom_adj value) moveed the oom_adj value to\nthe mm_struct. It was a very good first step for sanitize OOM.\n\nHowever Paul Menage reported the commit makes regression to his job\nscheduler. Current OOM logic can kill OOM_DISABLED process.\n\nWhy? His program has the code of similar to the following.\n\n\t...\n\tset_oom_adj(OOM_DISABLE); /* The job scheduler never killed by oom */\n\t...\n\tif (vfork() \u003d\u003d 0) {\n\t\tset_oom_adj(0); /* Invoked child can be killed */\n\t\texecve(\"foo-bar-cmd\");\n\t}\n\t....\n\nvfork() parent and child are shared the same mm_struct. then above\nset_oom_adj(0) doesn\u0027t only change oom_adj for vfork() child, it\u0027s also\nchange oom_adj for vfork() parent. Then, vfork() parent (job scheduler)\nlost OOM immune and it was killed.\n\nActually, fork-setting-exec idiom is very frequently used in userland program.\nWe must not break this assumption.\n\nThen, this patch revert commit 2ff05b2b and related commit.\n\nReverted commit list\n---------------------\n- commit 2ff05b2b4e (oom: move oom_adj value from task_struct to mm_struct)\n- commit 4d8b9135c3 (oom: avoid unnecessary mm locking and scanning for OOM_DISABLE)\n- commit 8123681022 (oom: only oom kill exiting tasks with attached memory)\n- commit 933b787b57 (mm: copy over oom_adj value at fork time)\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "81236810226f71bd9ff77321c8e8276dae7efc61", "tree": "8194006c780be40bfac49a2c557ab037186a57e9", "parents": [ "9198e96c06744517e3b18fce8be6db61e96a3227" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Jun 16 15:33:16 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:45 2009 -0700" }, "message": "oom: only oom kill exiting tasks with attached memory\n\nWhen a task is chosen for oom kill and is found to be PF_EXITING,\n__oom_kill_task() is called to elevate the task\u0027s timeslice and give it\naccess to memory reserves so that it may quickly exit.\n\nThis privilege is unnecessary, however, if the task has already detached\nits mm. Although its possible for the mm to become detached later since\ntask_lock() is not held, __oom_kill_task() will simply be a no-op in such\ncircumstances.\n\nSubsequently, it is no longer necessary to warn about killing mm-less\ntasks since it is a no-op.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.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": "4d8b9135c30ccbe46e621fefd862969819003fd6", "tree": "47674640c8a65b3ba440b2dc224efbab7571c638", "parents": [ "2ff05b2b4eac2e63d345fc731ea151a060247f53" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Jun 16 15:32:57 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:43 2009 -0700" }, "message": "oom: avoid unnecessary mm locking and scanning for OOM_DISABLE\n\nThis moves the check for OOM_DISABLE to the badness heuristic so it is\nonly necessary to hold task_lock() once. If the mm is OOM_DISABLE, the\nscore is 0, which is also correctly exported via /proc/pid/oom_score.\nThis requires that tasks with badness scores of 0 are prohibited from\nbeing oom killed, which makes sense since they would not allow for future\nmemory freeing anyway.\n\nSince the oom_adj value is a characteristic of an mm and not a task, it is\nno longer necessary to check the oom_adj value for threads sharing the\nsame memory (except when simply issuing SIGKILLs for threads in other\nthread groups).\n\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2ff05b2b4eac2e63d345fc731ea151a060247f53", "tree": "1840bc2d3b381eca5d39869499339b0fcc6eabbf", "parents": [ "c9e444103b5e7a5a3519f9913f59767f92e33baf" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Jun 16 15:32:56 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:43 2009 -0700" }, "message": "oom: move oom_adj value from task_struct to mm_struct\n\nThe per-task oom_adj value is a characteristic of its mm more than the\ntask itself since it\u0027s not possible to oom kill any thread that shares the\nmm. If a task were to be killed while attached to an mm that could not be\nfreed because another thread were set to OOM_DISABLE, it would have\nneedlessly been terminated since there is no potential for future memory\nfreeing.\n\nThis patch moves oomkilladj (now more appropriately named oom_adj) from\nstruct task_struct to struct mm_struct. This requires task_lock() on a\ntask to check its oom_adj value to protect against exec, but it\u0027s already\nnecessary to take the lock when dereferencing the mm to find the total VM\nsize for the badness heuristic.\n\nThis fixes a livelock if the oom killer chooses a task and another thread\nsharing the same memory has an oom_adj value of OOM_DISABLE. This occurs\nbecause oom_kill_task() repeatedly returns 1 and refuses to kill the\nchosen task while select_bad_process() will repeatedly choose the same\ntask during the next retry.\n\nTaking task_lock() in select_bad_process() to check for OOM_DISABLE and in\noom_kill_task() to check for threads sharing the same memory will be\nremoved in the next patch in this series where it will no longer be\nnecessary.\n\nWriting to /proc/pid/oom_adj for a kthread will now return -EINVAL since\nthese threads are immune from oom killing already. They simply report an\noom_adj value of OOM_DISABLE.\n\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6d2661ede5f20f968422e790af3334908c3bc857", "tree": "2e002d883eee9be5c52d844a7b0c3354338d8995", "parents": [ "681a1b4032d72f4ad6d4beed751bc65574572746" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Thu May 28 14:34:19 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri May 29 08:40:01 2009 -0700" }, "message": "oom: fix possible oom_dump_tasks NULL pointer\n\nWhen /proc/sys/vm/oom_dump_tasks is enabled, it is possible to get a NULL\npointer for tasks that have detached mm\u0027s since task_lock() is not held\nduring the tasklist scan. Add the task_lock().\n\nAcked-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "184101bf143ac96d62b3dcc17e7b3550f98d3350", "tree": "c16b7d56d5603ae9d120a99cbf814195d750a380", "parents": [ "df3935ffd6166fdd00702cf548fb5bb55737758b" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Wed May 06 16:02:55 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed May 06 16:36:09 2009 -0700" }, "message": "oom: prevent livelock when oom_kill_allocating_task is set\n\nWhen /proc/sys/vm/oom_kill_allocating_task is set for large systems that\nwant to avoid the lengthy tasklist scan, it\u0027s possible to livelock if\ncurrent is ineligible for oom kill. This normally happens when it is set\nto OOM_DISABLE, but is also possible if any threads are sharing the same\n-\u003emm with a different tgid.\n\nSo change __out_of_memory() to fall back to the full task-list scan if it\nwas unable to kill `current\u0027.\n\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e222432bfa7dcf6ec008622a978c9f284ed5e3a9", "tree": "b006f569cb66523a5644ad0ef1669b051ccda907", "parents": [ "0b7f569e45bb6be142d87017030669a6a7d327a1" ], "author": { "name": "Balbir Singh", "email": "balbir@linux.vnet.ibm.com", "time": "Thu Apr 02 16:57:39 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:55 2009 -0700" }, "message": "memcg: show memcg information during OOM\n\nAdd RSS and swap to OOM output from memcg\n\nDisplay memcg values like failcnt, usage and limit when an OOM occurs due\nto memcg.\n\nThanks to Johannes Weiner, Li Zefan, David Rientjes, Kamezawa Hiroyuki,\nDaisuke Nishimura and KOSAKI Motohiro for review.\n\nSample output\n-------------\n\nTask in /a/x killed as a result of limit of /a\nmemory: usage 1048576kB, limit 1048576kB, failcnt 4183\nmemory+swap: usage 1400964kB, limit 9007199254740991kB, failcnt 0\n\n[akpm@linux-foundation.org: compilation fix]\n[akpm@linux-foundation.org: fix kerneldoc and whitespace]\n[akpm@linux-foundation.org: add printk facility level]\nSigned-off-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a12888f772dab4bf5e6f73668dc4f5f6026a7014", "tree": "6a6113899ff39e58993280bb831a813a43a8e1e1", "parents": [ "d086817dc0d42f1be8db4138233d33e1dd16a956" ], "author": { "name": "Cyrill Gorcunov", "email": "gorcunov@gmail.com", "time": "Tue Mar 31 15:19:27 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:11 2009 -0700" }, "message": "oom_kill: don\u0027t call for int_sqrt(0)\n\nThere is no need to call for int_sqrt if argument is 0.\n\nSigned-off-by: Cyrill Gorcunov \u003cgorcunov@openvz.org\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7f4d454dee2e0bdd21bafd413d1c53e443a26540", "tree": "abf54c2bd7c91fe09685e42b3a92d84679403058", "parents": [ "a5e924f5f8abf97944e625d74967cc9452cfbce8" ], "author": { "name": "Daisuke Nishimura", "email": "nishimura@mxp.nes.nec.co.jp", "time": "Wed Jan 07 18:08:29 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:09 2009 -0800" }, "message": "memcg: avoid deadlock caused by race between oom and cpuset_attach\n\nmpol_rebind_mm(), which can be called from cpuset_attach(), does\ndown_write(mm-\u003emmap_sem). This means down_write(mm-\u003emmap_sem) can be\ncalled under cgroup_mutex.\n\nOTOH, page fault path does down_read(mm-\u003emmap_sem) and calls\nmem_cgroup_try_charge_xxx(), which may eventually calls\nmem_cgroup_out_of_memory(). And mem_cgroup_out_of_memory() calls\ncgroup_lock(). This means cgroup_lock() can be called under\ndown_read(mm-\u003emmap_sem).\n\nIf those two paths race, deadlock can happen.\n\nThis patch avoid this deadlock by:\n - remove cgroup_lock() from mem_cgroup_out_of_memory().\n - define new mutex (memcg_tasklist) and serialize mem_cgroup_move_task()\n (-\u003eattach handler of memory cgroup) and mem_cgroup_out_of_memory.\n\nSigned-off-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a636b327f731143ccc544b966cfd8de6cb6d72c6", "tree": "e53b03b64e8ebca20649c2d877bc4c3ef54ec34c", "parents": [ "2e4d40915fb85207fe48cfc31201824ec6d7426e" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Jan 07 18:08:08 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:06 2009 -0800" }, "message": "memcg: avoid unnecessary system-wide-oom-killer\n\nCurrent mmtom has new oom function as pagefault_out_of_memory(). It\u0027s\nadded for select bad process rathar than killing current.\n\nWhen memcg hit limit and calls OOM at page_fault, this handler called and\nsystem-wide-oom handling happens. (means kernel panics if panic_on_oom is\ntrue....)\n\nTo avoid overkill, check memcg\u0027s recent behavior before starting\nsystem-wide-oom.\n\nAnd this patch also fixes to guarantee \"don\u0027t accnout against process with\nTIF_MEMDIE\". This is necessary for smooth OOM.\n\n[akpm@linux-foundation.org: build fix]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nCc: Badari Pulavarty \u003cpbadari@us.ibm.com\u003e\nCc: Jan Blunck \u003cjblunck@suse.de\u003e\nCc: Hirokazu Takahashi \u003ctaka@valinux.co.jp\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.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": "75aa199410359dc5fbcf9025ff7af98a9d20f0d5", "tree": "569bffa181ccba56d884ec7e826ae61384297f56", "parents": [ "c7d4caeb1d68d07f77cc09fc20b7759d6d7aa3b1" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Jan 06 14:39:01 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:58:59 2009 -0800" }, "message": "oom: print triggering task\u0027s cpuset and mems allowed\n\nWhen cpusets are enabled, it\u0027s necessary to print the triggering task\u0027s\nset of allowable nodes so the subsequently printed meminfo can be\ninterpreted correctly.\n\nWe also print the task\u0027s cpuset name for informational purposes.\n\n[rientjes@google.com: task lock current before dereferencing cpuset]\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": "c7d4caeb1d68d07f77cc09fc20b7759d6d7aa3b1", "tree": "5348580e30f4ce2e5a10376bb5951ff94b8fb616", "parents": [ "1c0fe6e3bda0464728c23c8d84aa47567e8b716c" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Jan 06 14:39:00 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:58:58 2009 -0800" }, "message": "oom: fix zone_scan_mutex name\n\nzone_scan_mutex is actually a spinlock, so name it appropriately.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.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": "1c0fe6e3bda0464728c23c8d84aa47567e8b716c", "tree": "64f7903ee7757b14464e8a06bf91f5c4d5a8ba56", "parents": [ "5bd1455c239672081d0e7f086e899b8cbc7a9844" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Tue Jan 06 14:38:59 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:58:58 2009 -0800" }, "message": "mm: invoke oom-killer from page fault\n\nRather than have the pagefault handler kill a process directly if it gets\na VM_FAULT_OOM, have it call into the OOM killer.\n\nWith increasingly sophisticated oom behaviour (cpusets, memory cgroups,\noom killing throttling, oom priority adjustment or selective disabling,\npanic on oom, etc), it\u0027s silly to unconditionally kill the faulting\nprocess at page fault time. Create a hook for pagefault oom path to call\ninto instead.\n\nOnly converted x86 and uml so far.\n\n[akpm@linux-foundation.org: make __out_of_memory() static]\n[akpm@linux-foundation.org: fix comment]\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Jeff Dike \u003cjdike@addtoit.com\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\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": "2b828925652340277a889cbc11b2d0637f7cdaf7", "tree": "32fcb3d3e466fc419fad2d3717956a5b5ad3d35a", "parents": [ "3a3b7ce9336952ea7b9564d976d068a238976c9d", "58e20d8d344b0ee083febb18c2b021d2427e56ca" ], "author": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Fri Nov 14 11:29:12 2008 +1100" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Fri Nov 14 11:29:12 2008 +1100" }, "message": "Merge branch \u0027master\u0027 into next\n\nConflicts:\n\tsecurity/keys/internal.h\n\tsecurity/keys/process_keys.c\n\tsecurity/keys/request_key.c\n\nFixed conflicts above by using the non \u0027tsk\u0027 versions.\n\nSigned-off-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "c69e8d9c01db2adc503464993c358901c9af9de4", "tree": "bed94aaa9aeb7a7834d1c880f72b62a11a752c78", "parents": [ "86a264abe542cfececb4df129bc45a0338d8cdb9" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Nov 14 10:39:19 2008 +1100" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Fri Nov 14 10:39:19 2008 +1100" }, "message": "CRED: Use RCU to access another task\u0027s creds and to release a task\u0027s own creds\n\nUse RCU to access another task\u0027s creds and to release a task\u0027s own creds.\nThis means that it will be possible for the credentials of a task to be\nreplaced without another task (a) requiring a full lock to read them, and (b)\nseeing deallocated memory.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: James Morris \u003cjmorris@namei.org\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nSigned-off-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "b6dff3ec5e116e3af6f537d4caedcad6b9e5082a", "tree": "9e76f972eb7ce9b84e0146c8e4126a3f86acb428", "parents": [ "15a2460ed0af7538ca8e6c610fe607a2cd9da142" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Nov 14 10:39:16 2008 +1100" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Fri Nov 14 10:39:16 2008 +1100" }, "message": "CRED: Separate task security context from task_struct\n\nSeparate the task security context from task_struct. At this point, the\nsecurity data is temporarily embedded in the task_struct with two pointers\npointing to it.\n\nNote that the Alpha arch is altered as it refers to (E)UID and (E)GID in\nentry.S via asm-offsets.\n\nWith comment fixes Signed-off-by: Marc Dionne \u003cmarc.c.dionne@gmail.com\u003e\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: James Morris \u003cjmorris@namei.org\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nSigned-off-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "a2f2945a99057c7d44043465906c6bb63c3368a0", "tree": "b7edb1a346217a2b27d25ea72cc652065877e45a", "parents": [ "06112163f5fd9e491a7f810443d81efa9d88e247" ], "author": { "name": "Eric Paris", "email": "eparis@redhat.com", "time": "Tue Nov 11 22:02:54 2008 +1100" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Tue Nov 11 22:02:54 2008 +1100" }, "message": "The oomkiller calculations make decisions based on capabilities. Since\nthese are not security decisions and LSMs should not record if they fall\nthe request they should use the new has_capability_noaudit() interface so\nthe denials will not be recorded.\n\nSigned-off-by: Eric Paris \u003ceparis@redhat.com\u003e\nAcked-by: Stephen Smalley \u003csds@tycho.nsa.gov\u003e\nSigned-off-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "fbdd12676c83df77480f00ebd32fc98fbe3bf836", "tree": "cba7d12d8fdacec6139a567a1a3e2a07c5af683c", "parents": [ "fd96feb2583688ad13d8467ded442f9c8d73cc4b" ], "author": { "name": "Qinghuang Feng", "email": "qhfeng.kernel@gmail.com", "time": "Thu Nov 06 12:53:34 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Nov 06 15:41:19 2008 -0800" }, "message": "mm/oom_kill.c: fix badness() kerneldoc\n\nParamter @mem has been removed since v2.6.26, now delete it\u0027s comment.\n\nSigned-off-by: Qinghuang Feng \u003cqhfeng.kernel@gmail.com\u003e\nAcked-by: Randy Dunlap \u003crdunlap@xenotime.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b4416d2bea007f07f2e74cdc4cb64042ec996c83", "tree": "a7b8250e3ab4f9de7c55a5b502238767aff90665", "parents": [ "953a64798d82ee5467da2bdc0e467ef874fbc208" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Thu Nov 06 12:53:29 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Nov 06 15:41:18 2008 -0800" }, "message": "oom: do not dump task state for non thread group leaders\n\nWhen /proc/sys/vm/oom_dump_tasks is enabled, it\u0027s only necessary to dump\ntask state information for thread group leaders. The kernel log gets\nquickly overwhelmed on machines with a massive number of threads by\ndumping non-thread group leaders.\n\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5cd9c58fbe9ec92b45b27e131719af4f2bd9eb40", "tree": "8573db001b4dc3c2ad97102dda42b841c40b5f6c", "parents": [ "8d0968abd03ec6b407df117adc773562386702fa" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Thu Aug 14 11:37:28 2008 +0100" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Thu Aug 14 22:59:43 2008 +1000" }, "message": "security: Fix setting of PF_SUPERPRIV by __capable()\n\nFix the setting of PF_SUPERPRIV by __capable() as it could corrupt the flags\nthe target process if that is not the current process and it is trying to\nchange its own flags in a different way at the same time.\n\n__capable() is using neither atomic ops nor locking to protect t-\u003eflags. This\npatch removes __capable() and introduces has_capability() that doesn\u0027t set\nPF_SUPERPRIV on the process being queried.\n\nThis patch further splits security_ptrace() in two:\n\n (1) security_ptrace_may_access(). This passes judgement on whether one\n process may access another only (PTRACE_MODE_ATTACH for ptrace() and\n PTRACE_MODE_READ for /proc), and takes a pointer to the child process.\n current is the parent.\n\n (2) security_ptrace_traceme(). This passes judgement on PTRACE_TRACEME only,\n and takes only a pointer to the parent process. current is the child.\n\n In Smack and commoncap, this uses has_capability() to determine whether\n the parent will be permitted to use PTRACE_ATTACH if normal checks fail.\n This does not set PF_SUPERPRIV.\n\nTwo of the instances of __capable() actually only act on current, and so have\nbeen changed to calls to capable().\n\nOf the places that were using __capable():\n\n (1) The OOM killer calls __capable() thrice when weighing the killability of a\n process. All of these now use has_capability().\n\n (2) cap_ptrace() and smack_ptrace() were using __capable() to check to see\n whether the parent was allowed to trace any process. As mentioned above,\n these have been split. For PTRACE_ATTACH and /proc, capable() is now\n used, and for PTRACE_TRACEME, has_capability() is used.\n\n (3) cap_safe_nice() only ever saw current, so now uses capable().\n\n (4) smack_setprocattr() rejected accesses to tasks other than current just\n after calling __capable(), so the order of these two tests have been\n switched and capable() is used instead.\n\n (5) In smack_file_send_sigiotask(), we need to allow privileged processes to\n receive SIGIO on files they\u0027re manipulating.\n\n (6) In smack_task_wait(), we let a process wait for a privileged process,\n whether or not the process doing the waiting is privileged.\n\nI\u0027ve tested this with the LTP SELinux and syscalls testscripts.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nAcked-by: Casey Schaufler \u003ccasey@schaufler-ca.com\u003e\nAcked-by: Andrew G. Morgan \u003cmorgan@kernel.org\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "97d87c9710bc6c5f2585fb9dc58f5bedbe996f10", "tree": "60d6b2adc950c55330504fc472464339328d7ef7", "parents": [ "0c0a4a517a31e05efb38304668198a873bfec6ca" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Mon Apr 28 02:13:35 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:26 2008 -0700" }, "message": "oom_kill: remove unused parameter in badness()\n\nIn commit 4c4a22148909e4c003562ea7ffe0a06e26919e3c, we moved the\nmemcontroller-related code from badness() to select_bad_process(), so the\nparameter \u0027mem\u0027 in badness() is unused now.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "dd1a239f6f2d4d3eedd318583ec319aa145b324c", "tree": "aff4224c96b5e2e67588c3946858a724863eeaf9", "parents": [ "54a6eb5c4765aa573a030ceeba2c14e3d2ea5706" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Mon Apr 28 02:12:17 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:18 2008 -0700" }, "message": "mm: have zonelist contains structs with both a zone pointer and zone_idx\n\nFiltering zonelists requires very frequent use of zone_idx(). This is costly\nas it involves a lookup of another structure and a substraction operation. As\nthe zone_idx is often required, it should be quickly accessible. The node idx\ncould also be stored here if it was found that accessing zone-\u003enode is\nsignificant which may be the case on workloads where nodemasks are heavily\nused.\n\nThis patch introduces a struct zoneref to store a zone pointer and a zone\nindex. The zonelist then consists of an array of these struct zonerefs which\nare looked up as necessary. Helpers are given for accessing the zone index as\nwell as the node index.\n\n[kamezawa.hiroyu@jp.fujitsu.com: Suggested struct zoneref instead of embedding information in pointers]\n[hugh@veritas.com: mm-have-zonelist: fix memcg ooms]\n[hugh@veritas.com: just return do_try_to_free_pages]\n[hugh@veritas.com: do_try_to_free_pages gfp_mask redundant]\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "54a6eb5c4765aa573a030ceeba2c14e3d2ea5706", "tree": "547176a090beb787722a153cf2b8b942dc0e68db", "parents": [ "18ea7e710d2452fa726814a406779188028cf1bf" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Mon Apr 28 02:12:16 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:18 2008 -0700" }, "message": "mm: use two zonelist that are filtered by GFP mask\n\nCurrently a node has two sets of zonelists, one for each zone type in the\nsystem and a second set for GFP_THISNODE allocations. Based on the zones\nallowed by a gfp mask, one of these zonelists is selected. All of these\nzonelists consume memory and occupy cache lines.\n\nThis patch replaces the multiple zonelists per-node with two zonelists. The\nfirst contains all populated zones in the system, ordered by distance, for\nfallback allocations when the target/preferred node has no free pages. The\nsecond contains all populated zones in the node suitable for GFP_THISNODE\nallocations.\n\nAn iterator macro is introduced called for_each_zone_zonelist() that interates\nthrough each zone allowed by the GFP flags in the selected zonelist.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.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": "e115f2d89253490fb2dbf304b627f8d908df26f1", "tree": "cfed18e5ac01247f6edbf0d72b418b9e7e110265", "parents": [ "e169c139642fb4c682ec12a409725508dbefa520" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Apr 15 14:34:37 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 15 19:35:40 2008 -0700" }, "message": "memcg: fix oops in oom handling\n\nWhen I used a test program to fork mass processes and immediately move them to\na cgroup where the memory limit is low enough to trigger oom kill, I got oops:\n\nBUG: unable to handle kernel NULL pointer dereference at 0000000000000808\nIP: [\u003cffffffff8045c47f\u003e] _spin_lock_irqsave+0x8/0x18\nPGD 4c95f067 PUD 4406c067 PMD 0\nOops: 0002 [1] SMP\nCPU 2\nModules linked in:\n\nPid: 11973, comm: a.out Not tainted 2.6.25-rc7 #5\nRIP: 0010:[\u003cffffffff8045c47f\u003e] [\u003cffffffff8045c47f\u003e] _spin_lock_irqsave+0x8/0x18\nRSP: 0018:ffff8100448c7c30 EFLAGS: 00010002\nRAX: 0000000000000202 RBX: 0000000000000009 RCX: 000000000001c9f3\nRDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000808\nRBP: ffff81007e444080 R08: 0000000000000000 R09: ffff8100448c7900\nR10: ffff81000105f480 R11: 00000100ffffffff R12: ffff810067c84140\nR13: 0000000000000001 R14: ffff8100441d0018 R15: ffff81007da56200\nFS: 00007f70eb1856f0(0000) GS:ffff81007fbad3c0(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b\nCR2: 0000000000000808 CR3: 000000004498a000 CR4: 00000000000006e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400\nProcess a.out (pid: 11973, threadinfo ffff8100448c6000, task ffff81007da533e0)\nStack: ffffffff8023ef5a 00000000000000d0 ffffffff80548dc0 00000000000000d0\n ffff810067c84140 ffff81007e444080 ffffffff8026cef9 00000000000000d0\n ffff8100441d0000 00000000000000d0 ffff8100441d0000 ffff8100505445c0\nCall Trace:\n [\u003cffffffff8023ef5a\u003e] ? force_sig_info+0x25/0xb9\n [\u003cffffffff8026cef9\u003e] ? oom_kill_task+0x77/0xe2\n [\u003cffffffff8026d696\u003e] ? mem_cgroup_out_of_memory+0x55/0x67\n [\u003cffffffff802910ad\u003e] ? mem_cgroup_charge_common+0xec/0x202\n [\u003cffffffff8027997b\u003e] ? handle_mm_fault+0x24e/0x77f\n [\u003cffffffff8022c4af\u003e] ? default_wake_function+0x0/0xe\n [\u003cffffffff8027a17a\u003e] ? get_user_pages+0x2ce/0x3af\n [\u003cffffffff80290fee\u003e] ? mem_cgroup_charge_common+0x2d/0x202\n [\u003cffffffff8027a441\u003e] ? make_pages_present+0x8e/0xa4\n [\u003cffffffff8027d1ab\u003e] ? mmap_region+0x373/0x429\n [\u003cffffffff8027d7eb\u003e] ? do_mmap_pgoff+0x2ff/0x364\n [\u003cffffffff80210471\u003e] ? sys_mmap+0xe5/0x111\n [\u003cffffffff8020bfc9\u003e] ? tracesys+0xdc/0xe1\n\nCode: 00 00 01 48 8b 3c 24 e9 46 d4 dd ff f0 ff 07 48 8b 3c 24 e9 3a d4 dd ff fe 07 48 8b 3c 24 e9 2f d4 dd ff 9c 58 fa ba 00 01 00 00 \u003cf0\u003e 66 0f c1 17 38 f2 74 06 f3 90 8a 17 eb f6 c3 fa b8 00 01 00\nRIP [\u003cffffffff8045c47f\u003e] _spin_lock_irqsave+0x8/0x18\n RSP \u003cffff8100448c7c30\u003e\nCR2: 0000000000000808\n---[ end trace c3702fa668021ea4 ]---\n\nIt\u0027s reproducable in a x86_64 box, but doesn\u0027t happen in x86_32.\n\nThis is because tsk-\u003esighand is not guarded by RCU, so we have to\nhold tasklist_lock, just as what out_of_memory() does.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Pavel Emelianov \u003cxemul@openvz.org\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nCc: David Rientjes \u003crientjes@cs.washington.edu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1b578df02207a67a29e8ced4db3b36d89df52fef", "tree": "0ac17c57012263be37b8a4abe70f8ef21e52cd64", "parents": [ "46711810200c50e639ffc52e755b3dba9b4c82a3" ], "author": { "name": "Randy Dunlap", "email": "randy.dunlap@oracle.com", "time": "Wed Mar 19 17:00:42 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 19 18:53:35 2008 -0700" }, "message": "mm/oom_kill: fix kernel-doc\n\nFix kernel-doc notation in oom_kill.c.\n\nSigned-off-by: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "00f0b8259e48979c37212995d798f3fbd0374690", "tree": "589e8250c016450324e0c730139d020cf2bf887c", "parents": [ "804defea1c020d5c52985685e56986f1a399acde" ], "author": { "name": "Balbir Singh", "email": "balbir@linux.vnet.ibm.com", "time": "Tue Mar 04 14:28:39 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Mar 04 16:35:12 2008 -0800" }, "message": "Memory controller: rename to Memory Resource Controller\n\nRename Memory Controller to Memory Resource Controller. Reflect the same\nchanges in the CONFIG definition for the Memory Resource Controller. Group\ntogether the config options for Resource Counters and Memory Resource\nController.\n\nSigned-off-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "fef1bdd68c81b71882ccb6f47c70980a03182063", "tree": "4cfa5c2c10787a3d54de05ca511db31730a239fd", "parents": [ "4c4a22148909e4c003562ea7ffe0a06e26919e3c" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Thu Feb 07 00:14:07 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Feb 07 08:42:19 2008 -0800" }, "message": "oom: add sysctl to enable task memory dump\n\nAdds a new sysctl, \u0027oom_dump_tasks\u0027, that enables the kernel to produce a\ndump of all system tasks (excluding kernel threads) when performing an\nOOM-killing. Information includes pid, uid, tgid, vm size, rss, cpu,\noom_adj score, and name.\n\nThis is helpful for determining why there was an OOM condition and which\nrogue task caused it.\n\nIt is configurable so that large systems, such as those with several\nthousand tasks, do not incur a performance penalty associated with dumping\ndata they may not desire.\n\nIf an OOM was triggered as a result of a memory controller, the tasklist\nshall be filtered to exclude tasks that are not a member of the same\ncgroup.\n\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4c4a22148909e4c003562ea7ffe0a06e26919e3c", "tree": "fa8b7d00e89f0eb4cdb4394dbc74d898810519aa", "parents": [ "4c6bc8dd5a0932f2c0b30a5f0a124464b7f614d0" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Thu Feb 07 00:14:06 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Feb 07 08:42:19 2008 -0800" }, "message": "memcontrol: move oom task exclusion to tasklist scan\n\nCreates a helper function to return non-zero if a task is a member of a\nmemory controller:\n\n\tint task_in_mem_cgroup(const struct task_struct *task,\n\t\t\t const struct mem_cgroup *mem);\n\nWhen the OOM killer is constrained by the memory controller, the exclusion\nof tasks that are not a member of that controller was previously misplaced\nand appeared in the badness scoring function. It should be excluded\nduring the tasklist scan in select_bad_process() instead.\n\n[akpm@linux-foundation.org: build fix]\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c7ba5c9e8176704bfac0729875fa62798037584d", "tree": "00df1c4cb67e313cdb66233381b4cee275fd46c0", "parents": [ "0eea10301708c64a6b793894c156e21ddd15eb64" ], "author": { "name": "Pavel Emelianov", "email": "xemul@openvz.org", "time": "Thu Feb 07 00:13:58 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Feb 07 08:42:19 2008 -0800" }, "message": "Memory controller: OOM handling\n\nOut of memory handling for cgroups over their limit. A task from the\ncgroup over limit is chosen using the existing OOM logic and killed.\n\nTODO:\n1. As discussed in the OLS BOF session, consider implementing a user\nspace policy for OOM handling.\n\n[akpm@linux-foundation.org: fix build due to oom-killer changes]\nSigned-off-by: Pavel Emelianov \u003cxemul@openvz.org\u003e\nSigned-off-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Kirill Korotaev \u003cdev@sw.ru\u003e\nCc: Herbert Poetzl \u003cherbert@13thfloor.at\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Vaidyanathan Srinivasan \u003csvaidy@linux.vnet.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "97829955ad291acec1d8b94e9911b3ceb1118bb1", "tree": "4af91977d82494375e09a961594f83ca77f253d7", "parents": [ "3b7391de67da515c91f48aa371de77cb6cc5c07e" ], "author": { "name": "Serge E. Hallyn", "email": "serue@us.ibm.com", "time": "Mon Feb 04 22:29:47 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:20 2008 -0800" }, "message": "oom_kill: remove uid\u003d\u003d0 checks\n\nRoot processes are considered more important when out of memory and killing\nproceses. The check for CAP_SYS_ADMIN was augmented with a check for\nuid\u003d\u003d0 or euid\u003d\u003d0.\n\nThere are several possible ways to look at this:\n\n\t1. uid comparisons are unnecessary, trust CAP_SYS_ADMIN\n\t alone. However CAP_SYS_RESOURCE is the one that really\n\t means \"give me extra resources\" so allow for that as\n\t well.\n\t2. Any privileged code should be protected, but uid is not\n\t an indication of privilege. So we should check whether\n\t any capabilities are raised.\n\t3. uid\u003d\u003d0 makes processes on the host as well as in containers\n\t more important, so we should keep the existing checks.\n\t4. uid\u003d\u003d0 makes processes only on the host more important,\n\t even without any capabilities. So we should be keeping\n\t the (uid\u003d\u003d0||euid\u003d\u003d0) check but only when\n\t userns\u003d\u003d\u0026init_user_ns.\n\nI\u0027m following number 1 here.\n\nSigned-off-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: Andrew Morgan \u003cmorgan@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": "e338d263a76af78fe8f38a72131188b58fceb591", "tree": "f3f046fc6fd66de43de7191830f0daf3bc4ec8eb", "parents": [ "8f6936f4d29aa14e54a2470b954a2e1f96322988" ], "author": { "name": "Andrew Morgan", "email": "morgan@kernel.org", "time": "Mon Feb 04 22:29:42 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:20 2008 -0800" }, "message": "Add 64-bit capability support to the kernel\n\nThe patch supports legacy (32-bit) capability userspace, and where possible\ntranslates 32-bit capabilities to/from userspace and the VFS to 64-bit\nkernel space capabilities. If a capability set cannot be compressed into\n32-bits for consumption by user space, the system call fails, with -ERANGE.\n\nFWIW libcap-2.00 supports this change (and earlier capability formats)\n\n http://www.kernel.org/pub/linux/libs/security/linux-privs/kernel-2.6/\n\n[akpm@linux-foundation.org: coding-syle fixes]\n[akpm@linux-foundation.org: use get_task_comm()]\n[ezk@cs.sunysb.edu: build fix]\n[akpm@linux-foundation.org: do not initialise statics to 0 or NULL]\n[akpm@linux-foundation.org: unused var]\n[serue@us.ibm.com: export __cap_ symbols]\nSigned-off-by: Andrew G. Morgan \u003cmorgan@kernel.org\u003e\nCc: Stephen Smalley \u003csds@tycho.nsa.gov\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: Chris Wright \u003cchrisw@sous-sol.org\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nCc: Casey Schaufler \u003ccasey@schaufler-ca.com\u003e\nSigned-off-by: Erez Zadok \u003cezk@cs.sunysb.edu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "fa717060f1ab7eb6570f2fb49136f838fc9195a9", "tree": "0338460dae3116563645e3bfa1ff5100d39826f8", "parents": [ "8eb703e4f33488bf75829564d51d427e17f7cd4c" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Fri Jan 25 21:08:27 2008 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jan 25 21:08:27 2008 +0100" }, "message": "sched: sched_rt_entity\n\nMove the task_struct members specific to rt scheduling together.\nA future optimization could be to put sched_entity and sched_rt_entity\ninto a union.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCC: Srivatsa Vaddagiri \u003cvatsa@linux.vnet.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "e91a810e884850781a1cada2ea81b8016881d244", "tree": "ed23efe49c12aeb8e336795bee11dde3e4ebb2ec", "parents": [ "e8b8c977734193adedf2b0f607d6252c78e86394" ], "author": { "name": "Al Viro", "email": "viro@ftp.linux.org.uk", "time": "Sat Oct 20 21:45:33 2007 +0100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Sat Oct 20 15:04:06 2007 -0700" }, "message": "oom_kill bug\n\nWrong order of arguments\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ba25f9dcc4ea6e30839fcab5a5516f2176d5bfed", "tree": "3123c03b25dd5c0cd24b6ab4fc16731217838157", "parents": [ "9a2e70572e94e21e7ec4186702d045415422bda0" ], "author": { "name": "Pavel Emelyanov", "email": "xemul@openvz.org", "time": "Thu Oct 18 23:40:40 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Oct 19 11:53:43 2007 -0700" }, "message": "Use helpers to obtain task pid in printks\n\nThe task_struct-\u003epid member is going to be deprecated, so start\nusing the helpers (task_pid_nr/task_pid_vnr/task_pid_nr_ns) in\nthe kernel.\n\nThe first thing to start with is the pid, printed to dmesg - in\nthis case we may safely use task_pid_nr(). Besides, printks produce\nmore (much more) than a half of all the explicit pid usage.\n\n[akpm@linux-foundation.org: git-drm went and changed lots of stuff]\nSigned-off-by: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Dave Airlie \u003cairlied@linux.ie\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "bac0abd6174e427404dd197cdbefece31e97329b", "tree": "68ed6bd8619552c921c9fb99e83cb04fcb235a39", "parents": [ "19b9b9b54e5f115907efd56be2c3799775a46561" ], "author": { "name": "Pavel Emelyanov", "email": "xemul@openvz.org", "time": "Thu Oct 18 23:40:18 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Oct 19 11:53:40 2007 -0700" }, "message": "Isolate some explicit usage of task-\u003etgid\n\nWith pid namespaces this field is now dangerous to use explicitly, so hide\nit behind the helpers.\n\nAlso the pid and pgrp fields o task_struct and signal_struct are to be\ndeprecated. Unfortunately this patch cannot be sent right now as this\nleads to tons of warnings, so start isolating them, and deprecate later.\n\nActually the p-\u003etgid \u003d\u003d pid has to be changed to has_group_leader_pid(),\nbut Oleg pointed out that in case of posix cpu timers this is the same, and\nthread_group_leader() is more preferable.\n\nSigned-off-by: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nAcked-by: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nCc: Sukadev Bhattiprolu \u003csukadev@us.ibm.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7b1915a989ea4d426d0fd98974ab80f30ef1d779", "tree": "b643758364628db742c3bdd27d0d36c9a39a95a5", "parents": [ "2e1975868ac9d41211fcaa6f2c5e44c4e7ff9e5b" ], "author": { "name": "Matthias Kaehlcke", "email": "matthias.kaehlcke@gmail.com", "time": "Thu Oct 18 23:39:58 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Oct 19 11:53:38 2007 -0700" }, "message": "mm/oom_kill.c: Use list_for_each_entry instead of list_for_each\n\nmm/oom_kill.c: Convert list_for_each to list_for_each_entry in\noom_kill_process()\n\nSigned-off-by: Matthias Kaehlcke \u003cmatthias.kaehlcke@gmail.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.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": "b460cbc581a53cc088ceba80608021dd49c63c43", "tree": "83c28d0adbc15f4157c77b40fa60c40a71cb8673", "parents": [ "3743ca05ff464b8a9e345c08a6c9ce30485f9805" ], "author": { "name": "Serge E. Hallyn", "email": "serue@us.ibm.com", "time": "Thu Oct 18 23:39:52 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Oct 19 11:53:37 2007 -0700" }, "message": "pid namespaces: define is_global_init() and is_container_init()\n\nis_init() is an ambiguous name for the pid\u003d\u003d1 check. Split it into\nis_global_init() and is_container_init().\n\nA cgroup init has it\u0027s tsk-\u003epid \u003d\u003d 1.\n\nA global init also has it\u0027s tsk-\u003epid \u003d\u003d 1 and it\u0027s active pid namespace\nis the init_pid_ns. But rather than check the active pid namespace,\ncompare the task structure with \u0027init_pid_ns.child_reaper\u0027, which is\ninitialized during boot to the /sbin/init process and never changes.\n\nChangelog:\n\n\t2.6.22-rc4-mm2-pidns1:\n\t- Use \u0027init_pid_ns.child_reaper\u0027 to determine if a given task is the\n\t global init (/sbin/init) process. This would improve performance\n\t and remove dependence on the task_pid().\n\n\t2.6.21-mm2-pidns2:\n\n\t- [Sukadev Bhattiprolu] Changed is_container_init() calls in {powerpc,\n\t ppc,avr32}/traps.c for the _exception() call to is_global_init().\n\t This way, we kill only the cgroup if the cgroup\u0027s init has a\n\t bug rather than force a kernel panic.\n\n[akpm@linux-foundation.org: fix comment]\n[sukadev@us.ibm.com: Use is_global_init() in arch/m32r/mm/fault.c]\n[bunk@stusta.de: kernel/pid.c: remove unused exports]\n[sukadev@us.ibm.com: Fix capability.c to work with threaded init]\nSigned-off-by: Serge E. Hallyn \u003cserue@us.ibm.com\u003e\nSigned-off-by: Sukadev Bhattiprolu \u003csukadev@us.ibm.com\u003e\nAcked-by: Pavel Emelianov \u003cxemul@openvz.org\u003e\nCc: Eric W. Biederman \u003cebiederm@xmission.com\u003e\nCc: Cedric Le Goater \u003cclg@fr.ibm.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: Herbert Poetzel \u003cherbert@13thfloor.at\u003e\nCc: Kirill Korotaev \u003cdev@sw.ru\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ae74138da609c576b221c765efa8b81b2365f465", "tree": "514b8ea20d97815a7dfd5fd9ebcb6377b178f2b0", "parents": [ "9aad369e5690cbd0505f75aa1d34c9cacfef48da" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:26:00 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:46 2007 -0700" }, "message": "oom: convert zone_scan_lock from mutex to spinlock\n\nThere\u0027s no reason to sleep in try_set_zone_oom() or clear_zonelist_oom() if\nthe lock can\u0027t be acquired; it will be available soon enough once the zonelist\nscanning is done. All other threads waiting for the OOM killer are also\ncontingent on the exiting task being able to acquire the lock in\nclear_zonelist_oom() so it doesn\u0027t make sense to put it to sleep.\n\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3ff566963ce804809af9e32331b287eedeeff501", "tree": "dd71c5613b27e8c309d7bbe48798e6cd5c4145cc", "parents": [ "bbe373f2c60b2aa36c3231734a5afc5271a06718" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:25:58 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:46 2007 -0700" }, "message": "oom: do not take callback_mutex\n\nSince no task descriptor\u0027s \u0027cpuset\u0027 field is dereferenced in the execution of\nthe OOM killer anymore, it is no longer necessary to take callback_mutex.\n\n[akpm@linux-foundation.org: restore cpuset_lock for other patches]\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "bbe373f2c60b2aa36c3231734a5afc5271a06718", "tree": "00146d69594672ca41e35be8ff9b349e8751ab5c", "parents": [ "7213f5066fc8a17c78389fe245de522b5cf0648a" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:25:58 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:46 2007 -0700" }, "message": "oom: compare cpuset mems_allowed instead of exclusive ancestors\n\nInstead of testing for overlap in the memory nodes of the the nearest\nexclusive ancestor of both current and the candidate task, it is better to\nsimply test for intersection between the task\u0027s mems_allowed in their task\ndescriptors. This does not require taking callback_mutex since it is only\nused as a hint in the badness scoring.\n\nTasks that do not have an intersection in their mems_allowed with the current\ntask are not explicitly restricted from being OOM killed because it is quite\npossible that the candidate task has allocated memory there before and has\nsince changed its mems_allowed.\n\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7213f5066fc8a17c78389fe245de522b5cf0648a", "tree": "76e33ed1e0bfa62cb6c2e05bd4bbf79f37ca4796", "parents": [ "fe071d7e8aae5745c009c808bb8933f22a9e305a" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:25:57 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:46 2007 -0700" }, "message": "oom: suppress extraneous stack and memory dump\n\nSuppresses the extraneous stack and memory dump when a parallel OOM killing\nhas been found. There\u0027s no need to fill the ring buffer with this information\nif its already been printed and the condition that triggered the previous OOM\nkiller has not yet been alleviated.\n\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "fe071d7e8aae5745c009c808bb8933f22a9e305a", "tree": "757dc7c41a7b56974c383743103fb711c976c288", "parents": [ "ff0ceb9deb6eb017f52900b708d49cfa77bf25fb" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:25:56 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:46 2007 -0700" }, "message": "oom: add oom_kill_allocating_task sysctl\n\nAdds a new sysctl, \u0027oom_kill_allocating_task\u0027, which will automatically kill\nthe OOM-triggering task instead of scanning through the tasklist to find a\nmemory-hogging target. This is helpful for systems with an insanely large\nnumber of tasks where scanning the tasklist significantly degrades\nperformance.\n\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "098d7f128a4e53cb64930628915ac767785e0e60", "tree": "ed3cab1daecab7f2a64b27deed190df3ec218789", "parents": [ "e815af95f94914993bbad279c71cf5fef9f4eaac" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:25:55 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:45 2007 -0700" }, "message": "oom: add per-zone locking\n\nOOM killer synchronization should be done with zone granularity so that memory\npolicy and cpuset allocations may have their corresponding zones locked and\nallow parallel kills for other OOM conditions that may exist elsewhere in the\nsystem. DMA allocations can be targeted at the zone level, which would not be\npossible if locking was done in nodes or globally.\n\nSynchronization shall be done with a variation of \"trylocks.\" The goal is to\nput the current task to sleep and restart the failed allocation attempt later\nif the trylock fails. Otherwise, the OOM killer is invoked.\n\nEach zone in the zonelist that __alloc_pages() was called with is checked for\nthe newly-introduced ZONE_OOM_LOCKED flag. If any zone has this flag present,\nthe \"trylock\" to serialize the OOM killer fails and returns zero. Otherwise,\nall the zones have ZONE_OOM_LOCKED set and the try_set_zone_oom() function\nreturns non-zero.\n\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "70e24bdf6d2fead14631e72a07fba012400c521e", "tree": "2c00056dfdf90f733876c717159bb8bbf9f440fe", "parents": [ "5a3135c2e77fe88cdea20b5e3f4761068b799ac2" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:25:53 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:45 2007 -0700" }, "message": "oom: move constraints to enum\n\nThe OOM killer\u0027s CONSTRAINT definitions are really more appropriate in an\nenum, so define them in include/linux/oom.h.\n\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ee31af5d649d8aa6ac7948a6d97ae48367ff2d7e", "tree": "8a16d8c15b8b56058b905c2b83a3a5f8112746c4", "parents": [ "6eaf806a223e61dc5f2de4ab591f11beb97a8f3b" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Tue Oct 16 01:25:30 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:58 2007 -0700" }, "message": "Memoryless nodes: OOM: use N_HIGH_MEMORY map instead of constructing one on the fly\n\nconstrained_alloc() builds its own memory map for nodes with memory. We have\nthat available in N_HIGH_MEMORY now. So simplify the code.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nAcked-by: Nishanth Aravamudan \u003cnacc@us.ibm.com\u003e\nAcked-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nAcked-by: Bob Picco \u003cbob.picco@hp.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Mel Gorman \u003cmel@skynet.ie\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a5e58a61420e99dd08685f622d4dc666bf07e9a5", "tree": "e9dfbeac7648a954c927d2461016e8d0d98cca74", "parents": [ "c8ed39ebe0cf490abd7bf7c77b728dd6fefb2cf8" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Jul 31 00:37:32 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Jul 31 15:39:36 2007 -0700" }, "message": "oom: print points as unsigned long\n\nIn badness(), the automatic variable \u0027points\u0027 is unsigned long. Print it\nas such.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4e950f6f0189f65f8bf069cf2272649ef418f5e4", "tree": "95710bedf2a5aa3b61002f3399e0950192fdd504", "parents": [ "673d5b43daa00b42759cecc6b0760b8bf6be80d2" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Mon Jul 30 02:36:13 2007 +0400" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Sun Jul 29 17:09:29 2007 -0700" }, "message": "Remove fs.h from mm.h\n\nRemove fs.h from mm.h. For this,\n 1) Uninline vma_wants_writenotify(). It\u0027s pretty huge anyway.\n 2) Add back fs.h or less bloated headers (err.h) to files that need it.\n\nAs result, on x86_64 allyesconfig, fs.h dependencies cut down from 3929 files\nrebuilt down to 3444 (-12.3%).\n\nCross-compile tested without regressions on my two usual configs and (sigh):\n\nalpha arm-mx1ads mips-bigsur powerpc-ebony\nalpha-allnoconfig arm-neponset mips-capcella powerpc-g5\nalpha-defconfig arm-netwinder mips-cobalt powerpc-holly\nalpha-up arm-netx mips-db1000 powerpc-iseries\narm arm-ns9xxx mips-db1100 powerpc-linkstation\narm-assabet arm-omap_h2_1610 mips-db1200 powerpc-lite5200\narm-at91rm9200dk arm-onearm mips-db1500 powerpc-maple\narm-at91rm9200ek arm-picotux200 mips-db1550 powerpc-mpc7448_hpc2\narm-at91sam9260ek arm-pleb mips-ddb5477 powerpc-mpc8272_ads\narm-at91sam9261ek arm-pnx4008 mips-decstation powerpc-mpc8313_rdb\narm-at91sam9263ek arm-pxa255-idp mips-e55 powerpc-mpc832x_mds\narm-at91sam9rlek arm-realview mips-emma2rh powerpc-mpc832x_rdb\narm-ateb9200 arm-realview-smp mips-excite powerpc-mpc834x_itx\narm-badge4 arm-rpc mips-fulong powerpc-mpc834x_itxgp\narm-carmeva arm-s3c2410 mips-ip22 powerpc-mpc834x_mds\narm-cerfcube arm-shannon mips-ip27 powerpc-mpc836x_mds\narm-clps7500 arm-shark mips-ip32 powerpc-mpc8540_ads\narm-collie arm-simpad mips-jazz powerpc-mpc8544_ds\narm-corgi arm-spitz mips-jmr3927 powerpc-mpc8560_ads\narm-csb337 arm-trizeps4 mips-malta powerpc-mpc8568mds\narm-csb637 arm-versatile mips-mipssim powerpc-mpc85xx_cds\narm-ebsa110 i386 mips-mpc30x powerpc-mpc8641_hpcn\narm-edb7211 i386-allnoconfig mips-msp71xx powerpc-mpc866_ads\narm-em_x270 i386-defconfig mips-ocelot powerpc-mpc885_ads\narm-ep93xx i386-up mips-pb1100 powerpc-pasemi\narm-footbridge ia64 mips-pb1500 powerpc-pmac32\narm-fortunet ia64-allnoconfig mips-pb1550 powerpc-ppc64\narm-h3600 ia64-bigsur mips-pnx8550-jbs powerpc-prpmc2800\narm-h7201 ia64-defconfig mips-pnx8550-stb810 powerpc-ps3\narm-h7202 ia64-gensparse mips-qemu powerpc-pseries\narm-hackkit ia64-sim mips-rbhma4200 powerpc-up\narm-integrator ia64-sn2 mips-rbhma4500 s390\narm-iop13xx ia64-tiger mips-rm200 s390-allnoconfig\narm-iop32x ia64-up mips-sb1250-swarm s390-defconfig\narm-iop33x ia64-zx1 mips-sead s390-up\narm-ixp2000 m68k mips-tb0219 sparc\narm-ixp23xx m68k-amiga mips-tb0226 sparc-allnoconfig\narm-ixp4xx m68k-apollo mips-tb0287 sparc-defconfig\narm-jornada720 m68k-atari mips-workpad sparc-up\narm-kafa m68k-bvme6000 mips-wrppmc sparc64\narm-kb9202 m68k-hp300 mips-yosemite sparc64-allnoconfig\narm-ks8695 m68k-mac parisc sparc64-defconfig\narm-lart m68k-mvme147 parisc-allnoconfig sparc64-up\narm-lpd270 m68k-mvme16x parisc-defconfig um-x86_64\narm-lpd7a400 m68k-q40 parisc-up x86_64\narm-lpd7a404 m68k-sun3 powerpc x86_64-allnoconfig\narm-lubbock m68k-sun3x powerpc-cell x86_64-defconfig\narm-lusl7200 mips powerpc-celleb x86_64-up\narm-mainstone mips-atlas powerpc-chrp32\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2b45ab3398a0ba119b1f672c7c56fd5a431b7f0a", "tree": "302238b786d2137111244702345acf6d4a17d4b7", "parents": [ "2b744c01a54fe0c9974ff1b29522f25f07084053" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Sun May 06 14:50:00 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon May 07 12:12:55 2007 -0700" }, "message": "oom: fix constraint deadlock\n\nFixes a deadlock in the OOM killer for allocations that are not\n__GFP_HARDWALL.\n\nBefore the OOM killer checks for the allocation constraint, it takes\ncallback_mutex.\n\nconstrained_alloc() iterates through each zone in the allocation zonelist\nand calls cpuset_zone_allowed_softwall() to determine whether an allocation\nfor gfp_mask is possible. If a zone\u0027s node is not in the OOM-triggering\ntask\u0027s mems_allowed, it is not exiting, and we did not fail on a\n__GFP_HARDWALL allocation, cpuset_zone_allowed_softwall() attempts to take\ncallback_mutex to check the nearest exclusive ancestor of current\u0027s cpuset.\n This results in deadlock.\n\nWe now take callback_mutex after iterating through the zonelist since we\ndon\u0027t need it yet.\n\nCc: Andi Kleen \u003cak@suse.de\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Christoph Lameter \u003cclameter@engr.sgi.com\u003e\nCc: Martin J. Bligh \u003cmbligh@mbligh.org\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2b744c01a54fe0c9974ff1b29522f25f07084053", "tree": "6f9c7399703ad34ab35f01a55c77a1d34a5c6dc1", "parents": [ "824ebef122153a03925ae0ed211b4e8568d1c8db" ], "author": { "name": "Yasunori Goto", "email": "y-goto@jp.fujitsu.com", "time": "Sun May 06 14:49:59 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon May 07 12:12:55 2007 -0700" }, "message": "mm: fix handling of panic_on_oom when cpusets are in use\n\nThe current panic_on_oom may not work if there is a process using\ncpusets/mempolicy, because other nodes\u0027 memory may remain. But some people\nwant failover by panic ASAP even if they are used. This patch makes new\nsetting for its request.\n\nThis is tested on my ia64 box which has 3 nodes.\n\nSigned-off-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nSigned-off-by: Benjamin LaHaise \u003cbcrl@kvack.org\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Ethan Solomita \u003csolo@google.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9a82782f8f58219d0c6dc5f0211ce301adf6c6f4", "tree": "0caef745a8ef3f96b3e2444d00a5180669e5c469", "parents": [ "3d67f2d7c0fb28b0eb6a6aa100b190526a971ad9" ], "author": { "name": "Joshua N Pritikin", "email": "jpritikin@pobox.com", "time": "Sun May 06 14:49:07 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon May 07 12:12:51 2007 -0700" }, "message": "allow oom_adj of saintly processes\n\nIf the badness of a process is zero then oom_adj\u003e0 has no effect. This\npatch makes sure that the oom_adj shift actually increases badness points\nappropriately.\n\nSigned-off-by: Joshua N. Pritikin \u003cjpritikin@pobox.com\u003e\nCc: Andrea Arcangeli \u003candrea@novell.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3d124cbba316737af8f3a6959edb95bbd130a4d8", "tree": "273350d3ce14b1252ff79fd24efa43f39161a200", "parents": [ "fdc30b3d448bf86dd45f9df3e8ac0d36a3bdd9b2" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Apr 23 14:41:02 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Apr 24 08:23:07 2007 -0700" }, "message": "fix OOM killing processes wrongly thought MPOL_BIND\n\nI only have CONFIG_NUMA\u003dy for build testing: surprised when trying a memhog\nto see lots of other processes killed with \"No available memory\n(MPOL_BIND)\". memhog is killed correctly once we initialize nodemask in\nconstrained_alloc().\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nAcked-by: William Irwin \u003cbill.irwin@oracle.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "650a7c974f1b91de9732c0f720e792837f8abfd6", "tree": "c1f3b166e7128a4b0c35a4f900ad5cd6c959b4a2", "parents": [ "c445a31cd7f469d77acc37538ab43a99530968b8" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Apr 23 21:36:13 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Apr 24 08:11:49 2007 -0700" }, "message": "oom: kill all threads that share mm with killed task\n\noom_kill_task() calls __oom_kill_task() to OOM kill a selected task.\nWhen finding other threads that share an mm with that task, we need to\nkill those individual threads and not the same one.\n\n(Bug introduced by f2a2a7108aa0039ba7a5fe7a0d2ecef2219a7584)\n\nAcked-by: William Irwin \u003cbill.irwin@oracle.com\u003e\nAcked-by: Christoph Lameter \u003cclameter@engr.sgi.com\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Andrew Morton \u003cakpm@osdl.org\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "35ae834fa02ba89cfbd4a80892c0e458fd6d5c0b", "tree": "37be7d571b1d6b4141f42dcd05a0289df1811d0a", "parents": [ "e5d480ff17f9220cd6198b5c91e8c75329f5594f" ], "author": { "name": "Ankita Garg", "email": "ankita@in.ibm.com", "time": "Fri Mar 16 13:38:33 2007 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Mar 16 19:25:06 2007 -0700" }, "message": "[PATCH] oom fix: prevent oom from killing a process with children/sibling unkillable\n\nLooking at oom_kill.c, found that the intention to not kill the selected\nprocess if any of its children/siblings has OOM_DISABLE set, is not being\nmet.\n\nSigned-off-by: Ankita Garg \u003cankita@in.ibm.com\u003e\nAcked-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nAcked-by: William Irwin \u003cwli@holomorphy.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7ba3485947ee7bc89a17f86250fe9b692a615dff", "tree": "77fce78136f040d9382f1b27687478bbcbec051a", "parents": [ "c8af57eb76fbd70c7f5b421b065fd55d096e2bff" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Fri Jan 05 16:37:03 2007 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Fri Jan 05 23:55:29 2007 -0800" }, "message": "[PATCH] fix OOM killing of swapoff\n\nThese days, if you swapoff when there isn\u0027t enough memory, OOM killer gives\n\"BUG: scheduling while atomic\" and the machine hangs: badness() needs to do\nits PF_SWAPOFF return after the task_unlock (tasklist_lock is also held\nhere, so p isn\u0027t going to be freed: PF_SWAPOFF might get turned off at any\nmoment, but that doesn\u0027t really matter).\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "96ac5913f4e45c6a1b98350f2c0a8bb3abe2646a", "tree": "eb7f85431598ebf035e8b190d253e1b160694596", "parents": [ "e4e6bdbb426d1ecd9e4587f22115f8d0d426d21f" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Fri Dec 29 16:47:20 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Sat Dec 30 10:55:55 2006 -0800" }, "message": "[PATCH] fix oom killer kills current every time if there is memory-less-node take2\n\nconstrained_alloc(), which is called to detect where oom is from, checks\npassed zone_list(). If zone_list doesn\u0027t include all nodes, it thinks oom\nis from mempolicy.\n\nBut there is memory-less-node. memory-less-node\u0027s zones are never included\nin zonelist[].\n\ncontstrained_alloc() should get memory_less_node into count. Otherwise, it\nalways thinks \u0027oom is from mempolicy\u0027. This means that current process\ndies at any time. This patch fix it.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Christoph Lameter \u003cclameter@engr.sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" } ], "next": "02a0e53d8227aff5e62e0433f82c12c1c2805fd6" }