)]}' { "log": [ { "commit": "b246272ecc5ac68c743b15c9e41a2275f7ce70e2", "tree": "d32b30f02501a6978c7c2d97f7c505604f9bac28", "parents": [ "511585a28e5b5fd1cac61e601e42efc4c5dd64b5" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Dec 19 17:11:52 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Dec 20 10:25:04 2011 -0800" }, "message": "cpusets: stall when updating mems_allowed for mempolicy or disjoint nodemask\n\nKernels where MAX_NUMNODES \u003e BITS_PER_LONG may temporarily see an empty\nnodemask in a tsk\u0027s mempolicy if its previous nodemask is remapped onto a\nnew set of allowed cpuset nodes where the two nodemasks, as a result of\nthe remap, are now disjoint.\n\nc0ff7453bb5c (\"cpuset,mm: fix no node to alloc memory when changing\ncpuset\u0027s mems\") adds get_mems_allowed() to prevent the set of allowed\nnodes from changing for a thread. This causes any update to a set of\nallowed nodes to stall until put_mems_allowed() is called.\n\nThis stall is unncessary, however, if at least one node remains unchanged\nin the update to the set of allowed nodes. This was addressed by\n89e8a244b97e (\"cpusets: avoid looping when storing to mems_allowed if one\nnode remains set\"), but it\u0027s still possible that an empty nodemask may be\nread from a mempolicy because the old nodemask may be remapped to the new\nnodemask during rebind. To prevent this, only avoid the stall if there is\nno mempolicy for the thread being changed.\n\nThis is a temporary solution until all reads from mempolicy nodemasks can\nbe guaranteed to not be empty without the get_mems_allowed()\nsynchronization.\n\nAlso moves the check for nodemask intersection inside task_lock() so that\ntsk-\u003emems_allowed cannot change. This ensures that nothing can set this\ntsk\u0027s mems_allowed out from under us and also protects tsk-\u003emempolicy.\n\nReported-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Paul Menage \u003cpaul@paulmenage.org\u003e\nCc: Stephen Rothwell \u003csfr@canb.auug.org.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "32aaeffbd4a7457bf2f7448b33b5946ff2a960eb", "tree": "faf7ad871d87176423ff9ed1d1ba4d9c688fc23f", "parents": [ "208bca0860406d16398145ddd950036a737c3c9d", "67b84999b1a8b1af5625b1eabe92146c5eb42932" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Nov 06 19:44:47 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Nov 06 19:44:47 2011 -0800" }, "message": "Merge branch \u0027modsplit-Oct31_2011\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux\n\n* \u0027modsplit-Oct31_2011\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux: (230 commits)\n Revert \"tracing: Include module.h in define_trace.h\"\n irq: don\u0027t put module.h into irq.h for tracking irqgen modules.\n bluetooth: macroize two small inlines to avoid module.h\n ip_vs.h: fix implicit use of module_get/module_put from module.h\n nf_conntrack.h: fix up fallout from implicit moduleparam.h presence\n include: replace linux/module.h with \"struct module\" wherever possible\n include: convert various register fcns to macros to avoid include chaining\n crypto.h: remove unused crypto_tfm_alg_modname() inline\n uwb.h: fix implicit use of asm/page.h for PAGE_SIZE\n pm_runtime.h: explicitly requires notifier.h\n linux/dmaengine.h: fix implicit use of bitmap.h and asm/page.h\n miscdevice.h: fix up implicit use of lists and types\n stop_machine.h: fix implicit use of smp.h for smp_processor_id\n of: fix implicit use of errno.h in include/linux/of.h\n of_platform.h: delete needless include \u003clinux/module.h\u003e\n acpi: remove module.h include from platform/aclinux.h\n miscdevice.h: delete unnecessary inclusion of module.h\n device_cgroup.h: delete needless include \u003clinux/module.h\u003e\n net: sch_generic remove redundant use of \u003clinux/module.h\u003e\n net: inet_timewait_sock doesnt need \u003clinux/module.h\u003e\n ...\n\nFix up trivial conflicts (other header files, and removal of the ab3550 mfd driver) in\n - drivers/media/dvb/frontends/dibx000_common.c\n - drivers/media/video/{mt9m111.c,ov6650.c}\n - drivers/mfd/ab3550-core.c\n - include/linux/dmaengine.h\n" }, { "commit": "89e8a244b97e48f1f30e898b6f32acca477f2a13", "tree": "01d55ac07b57d8afaecd1a6871c5b5d6a7151586", "parents": [ "61600f578fbd2e8ad0c90bddb9c729e7628d3813" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Wed Nov 02 13:38:39 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Nov 02 16:07:00 2011 -0700" }, "message": "cpusets: avoid looping when storing to mems_allowed if one node remains set\n\n{get,put}_mems_allowed() exist so that general kernel code may locklessly\naccess a task\u0027s set of allowable nodes without having the chance that a\nconcurrent write will cause the nodemask to be empty on configurations\nwhere MAX_NUMNODES \u003e BITS_PER_LONG.\n\nThis could incur a significant delay, however, especially in low memory\nconditions because the page allocator is blocking and reclaim requires\nget_mems_allowed() itself. It is not atypical to see writes to\ncpuset.mems take over 2 seconds to complete, for example. In low memory\nconditions, this is problematic because it\u0027s one of the most imporant\ntimes to change cpuset.mems in the first place!\n\nThe only way a task\u0027s set of allowable nodes may change is through cpusets\nby writing to cpuset.mems and when attaching a task to a generic code is\nnot reading the nodemask with get_mems_allowed() at the same time, and\nthen clearing all the old nodes. This prevents the possibility that a\nreader will see an empty nodemask at the same time the writer is storing a\nnew nodemask.\n\nIf at least one node remains unchanged, though, it\u0027s possible to simply\nset all new nodes and then clear all the old nodes. Changing a task\u0027s\nnodemask is protected by cgroup_mutex so it\u0027s guaranteed that two threads\nare not changing the same task\u0027s nodemask at the same time, so the\nnodemask is guaranteed to be stored before another thread changes it and\ndetermines whether a node remains set or not.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Nick Piggin \u003cnpiggin@kernel.dk\u003e\nCc: Paul Menage \u003cpaul@paulmenage.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9984de1a5a8a96275fcab818f7419af5a3c86e71", "tree": "1935d411752707a1621c5caf64f75dfe105beb3a", "parents": [ "7c77509c542927ee2a3c8812fad84957e51bf67d" ], "author": { "name": "Paul Gortmaker", "email": "paul.gortmaker@windriver.com", "time": "Mon May 23 14:51:41 2011 -0400" }, "committer": { "name": "Paul Gortmaker", "email": "paul.gortmaker@windriver.com", "time": "Mon Oct 31 09:20:12 2011 -0400" }, "message": "kernel: Map most files to use export.h instead of module.h\n\nThe changed files were only including linux/module.h for the\nEXPORT_SYMBOL infrastructure, and nothing else. Revector them\nonto the isolated export header for faster compile times.\n\nNothing to see here but a whole lot of instances of:\n\n -#include \u003clinux/module.h\u003e\n +#include \u003clinux/export.h\u003e\n\nThis commit is only changing the kernel dir; next targets\nwill probably be mm, fs, the arch dirs, etc.\n\nSigned-off-by: Paul Gortmaker \u003cpaul.gortmaker@windriver.com\u003e\n" }, { "commit": "60063497a95e716c9a689af3be2687d261f115b4", "tree": "6ce0d68db76982c53df46aee5f29f944ebf2c320", "parents": [ "148817ba092f9f6edd35bad3c6c6b8e8f90fe2ed" ], "author": { "name": "Arun Sharma", "email": "asharma@fb.com", "time": "Tue Jul 26 16:09:06 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jul 26 16:49:47 2011 -0700" }, "message": "atomic: use \u003clinux/atomic.h\u003e\n\nThis allows us to move duplicated code in \u003casm/atomic.h\u003e\n(atomic_inc_not_zero() for now) to \u003clinux/atomic.h\u003e\n\nSigned-off-by: Arun Sharma \u003casharma@fb.com\u003e\nReviewed-by: Eric Dumazet \u003ceric.dumazet@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: Eric Dumazet \u003ceric.dumazet@gmail.com\u003e\nAcked-by: Mike Frysinger \u003cvapier@gentoo.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "778d3b0ff0654ad7092bf823fd32010066b12365", "tree": "cd0073d8c513e1c56fd6950c4ec985f16fd004ad", "parents": [ "8521fc50d433507a7cdc96bec280f9e5888a54cc" ], "author": { "name": "Michal Hocko", "email": "mhocko@suse.cz", "time": "Tue Jul 26 16:08:30 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jul 26 16:49:43 2011 -0700" }, "message": "cpusets: randomize node rotor used in cpuset_mem_spread_node()\n\n[ This patch has already been accepted as commit 0ac0c0d0f837 but later\n reverted (commit 35926ff5fba8) because it itroduced arch specific\n __node_random which was defined only for x86 code so it broke other\n archs. This is a followup without any arch specific code. Other than\n that there are no functional changes.]\n\nSome workloads that create a large number of small files tend to assign\ntoo many pages to node 0 (multi-node systems). Part of the reason is\nthat the rotor (in cpuset_mem_spread_node()) used to assign nodes starts\nat node 0 for newly created tasks.\n\nThis patch changes the rotor to be initialized to a random node number\nof the cpuset.\n\n[akpm@linux-foundation.org: fix layout]\n[Lee.Schermerhorn@hp.com: Define stub numa_random() for !NUMA configuration]\n[mhocko@suse.cz: Make it arch independent]\n[akpm@linux-foundation.org: fix CONFIG_NUMA\u003dy, MAX_NUMNODES\u003e1 build]\nSigned-off-by: Jack Steiner \u003csteiner@sgi.com\u003e\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nSigned-off-by: Michal Hocko \u003cmhocko@suse.cz\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Jack Steiner \u003csteiner@sgi.com\u003e\nCc: Robin Holt \u003cholt@sgi.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Jack Steiner \u003csteiner@sgi.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Robin Holt \u003cholt@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1e1b6c511d1b23cb7c3b619d82fc7bd9f620565d", "tree": "c50e88412c8b42264177dc125f74a30f9c7a82d9", "parents": [ "1e876231785d82443a5ac8b6c660e9f51bc5dede" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Thu May 19 15:08:58 2011 +0900" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat May 28 17:02:57 2011 +0200" }, "message": "cpuset: Fix cpuset_cpus_allowed_fallback(), don\u0027t update tsk-\u003ert.nr_cpus_allowed\n\nThe rule is, we have to update tsk-\u003ert.nr_cpus_allowed if we change\ntsk-\u003ecpus_allowed. Otherwise RT scheduler may confuse.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/r/4DD4B3FA.5060901@jp.fujitsu.com\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "a77aea92010acf54ad785047234418d5d68772e2", "tree": "c7cb57b62fd02bee2baceb79251923f7caec6139", "parents": [ "d846687d7f84e45f23ecf3846dbb43312a1206dd" ], "author": { "name": "Daniel Lezcano", "email": "daniel.lezcano@free.fr", "time": "Thu May 26 16:25:23 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 26 17:12:34 2011 -0700" }, "message": "cgroup: remove the ns_cgroup\n\nThe ns_cgroup is an annoying cgroup at the namespace / cgroup frontier and\nleads to some problems:\n\n * cgroup creation is out-of-control\n * cgroup name can conflict when pids are looping\n * it is not possible to have a single process handling a lot of\n namespaces without falling in a exponential creation time\n * we may want to create a namespace without creating a cgroup\n\n The ns_cgroup was replaced by a compatibility flag \u0027clone_children\u0027,\n where a newly created cgroup will copy the parent cgroup values.\n The userspace has to manually create a cgroup and add a task to\n the \u0027tasks\u0027 file.\n\nThis patch removes the ns_cgroup as suggested in the following thread:\n\nhttps://lists.linux-foundation.org/pipermail/containers/2009-June/018616.html\n\nThe \u0027cgroup_clone\u0027 function is removed because it is no longer used.\n\nThis is a userspace-visible change. Commit 45531757b45c (\"cgroup: notify\nns_cgroup deprecated\") (merged into 2.6.27) caused the kernel to emit a\nprintk warning users that the feature is planned for removal. Since that\ntime we have heard from XXX users who were affected by this.\n\nSigned-off-by: Daniel Lezcano \u003cdaniel.lezcano@free.fr\u003e\nSigned-off-by: Serge E. Hallyn \u003cserge.hallyn@canonical.com\u003e\nCc: Eric W. Biederman \u003cebiederm@xmission.com\u003e\nCc: Jamal Hadi Salim \u003chadi@cyberus.ca\u003e\nReviewed-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: Matt Helsley \u003cmatthltc@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f780bdb7c1c73009cb57adcf99ef50027d80bf3c", "tree": "d15668ffcc40a2aaa31723b87cfda0b166f84d57", "parents": [ "4714d1d32d97239fb5ae3e10521d3f133a899b66" ], "author": { "name": "Ben Blum", "email": "bblum@andrew.cmu.edu", "time": "Thu May 26 16:25:19 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 26 17:12:34 2011 -0700" }, "message": "cgroups: add per-thread subsystem callbacks\n\nAdd cgroup subsystem callbacks for per-thread attachment in atomic contexts\n\nAdd can_attach_task(), pre_attach(), and attach_task() as new callbacks\nfor cgroups\u0027s subsystem interface. Unlike can_attach and attach, these\nare for per-thread operations, to be called potentially many times when\nattaching an entire threadgroup.\n\nAlso, the old \"bool threadgroup\" interface is removed, as replaced by\nthis. All subsystems are modified for the new interface - of note is\ncpuset, which requires from/to nodemasks for attach to be globally scoped\n(though per-cpuset would work too) to persist from its pre_attach to\nattach_task and attach.\n\nThis is a pre-patch for cgroup-procs-writable.patch.\n\nSigned-off-by: Ben Blum \u003cbblum@andrew.cmu.edu\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Matt Helsley \u003cmatthltc@us.ibm.com\u003e\nReviewed-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Miao Xie \u003cmiaox@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": "60495e7760d8ee364695006af37309b0755e0e17", "tree": "1c842c0797a6a6b0066b18f296661fcf77cd0d0a", "parents": [ "54ab4ff4316eb329d2c1acc110fbc623d2966931" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Thu Apr 07 14:10:04 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Apr 11 14:09:32 2011 +0200" }, "message": "sched: Dynamic sched_domain::level\n\nRemove the SD_LV_ enum and use dynamic level assignments.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Mike Galbraith \u003cefault@gmx.de\u003e\nCc: Nick Piggin \u003cnpiggin@kernel.dk\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLink: http://lkml.kernel.org/r/20110407122942.969433965@chello.nl\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "523fb486bfd94e3a3b16a42bcb21b1959cf14df8", "tree": "34c1b15a9bc55ef7a3bafb87cce3d3d184d78906", "parents": [ "ee24d3797780eee6ffe581a7b78d27896f9b494a" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Mar 23 16:42:48 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 23 19:46:35 2011 -0700" }, "message": "cpuset: hold callback_mutex in cpuset_post_clone()\n\nChaning cpuset-\u003emems/cpuset-\u003ecpus should be protected under\ncallback_mutex.\n\ncpuset_clone() doesn\u0027t follow this rule. It\u0027s ok because it\u0027s\ncalled when creating and initializing a cgroup, but we\u0027d better\nhold the lock to avoid subtil break in the future.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Miao Xie \u003cmiaox@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": "ee24d3797780eee6ffe581a7b78d27896f9b494a", "tree": "8034dac124ab8f0a29bc6f238c030915b2e08398", "parents": [ "c8163ca8afcac0fc54593fc60d1e1110edbd0eb2" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Mar 23 16:42:47 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 23 19:46:35 2011 -0700" }, "message": "cpuset: fix unchecked calls to NODEMASK_ALLOC()\n\nThose functions that use NODEMASK_ALLOC() can\u0027t propagate errno\nto users, but will fail silently.\n\nFix it by using a static nodemask_t variable for each function, and\nthose variables are protected by cgroup_mutex;\n\n[akpm@linux-foundation.org: fix comment spelling, strengthen cgroup_lock comment]\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Miao Xie \u003cmiaox@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": "c8163ca8afcac0fc54593fc60d1e1110edbd0eb2", "tree": "55a363ed73b91d8350d2df7083abf49c5c97b20d", "parents": [ "9303e0c4814d2a6afca878cc35433291e862169c" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Mar 23 16:42:46 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 23 19:46:34 2011 -0700" }, "message": "cpuset: remove unneeded NODEMASK_ALLOC() in cpuset_attach()\n\noldcs-\u003emems_allowed is not modified during cpuset_attach(), so we don\u0027t\nhave to copy it to a buffer allocated by NODEMASK_ALLOC(). Just pass it\nto cpuset_migrate_mm().\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Miao Xie \u003cmiaox@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": "9303e0c4814d2a6afca878cc35433291e862169c", "tree": "786866f6f0639edcc2996d4157ea7128b2400898", "parents": [ "f9434ad1552427fab49336e1a6e3ef121895b9d1" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Mar 23 16:42:45 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 23 19:46:34 2011 -0700" }, "message": "cpuset: remove unneeded NODEMASK_ALLOC() in cpuset_sprintf_memlist()\n\nIt\u0027s not necessary to copy cpuset-\u003emems_allowed to a buffer allocated by\nNODEMASK_ALLOC(). Just pass it to nodelist_scnprintf().\n\nAs spotted by Paul, a side effect is we fix a bug that the function can\nreturn -ENOMEM but the caller doesn\u0027t expect negative return value.\nTherefore change the return value of cpuset_sprintf_cpulist() and\ncpuset_sprintf_memlist() from int to size_t.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Miao Xie \u003cmiaox@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": "b75f38d659e6fc747eda64cb72f3920e29dd44a4", "tree": "308edc066f8c26991323526d499eefa8c773f267", "parents": [ "2ec38a0359e227c01080dcd670a0368c61ccd9ce" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Fri Mar 04 17:36:21 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Mar 04 17:53:38 2011 -0800" }, "message": "cpuset: add a missing unlock in cpuset_write_resmask()\n\nDon\u0027t forget to release cgroup_mutex if alloc_trial_cpuset() fails.\n\n[akpm@linux-foundation.org: avoid multiple return points]\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Miao Xie \u003cmiaox@cn.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": "f7e835710ab5f6e43933c983f38f2d2e262b718c", "tree": "6acdc8212053398e6913dc5c0d8392edcf202f05", "parents": [ "ceefda6931806972ecf550bd8231dce4a4178953" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Jul 26 13:23:11 2010 +0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Oct 29 04:17:06 2010 -0400" }, "message": "convert cgroup and cpuset\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "b0ae19811375031ae3b3fecc65b702a9c6e5cc28", "tree": "a765b71155fbed1ed3a3cff35c1044ad49a002ae", "parents": [ "9b3056cca09529d34af2d81305b2a9c6b622ca1b" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Fri Oct 15 04:21:18 2010 +0900" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Thu Oct 21 10:12:44 2010 +1100" }, "message": "security: remove unused parameter from security_task_setscheduler()\n\nAll security modules shouldn\u0027t change sched_param parameter of\nsecurity_task_setscheduler(). This is not only meaningless, but also\nmake a harmful result if caller pass a static variable.\n\nThis patch remove policy and sched_param parameter from\nsecurity_task_setscheduler() becuase none of security module is\nusing it.\n\nCc: James Morris \u003cjmorris@namei.org\u003e\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "c4efd6b569b2646e1346a08a4c40286f8bcb5f11", "tree": "bf33e8594ac4e628cc95f2ef25513788b8273601", "parents": [ "4aed2fd8e3181fea7c09ba79cf64e7e3f4413bf9", "0bcfe75807944106a3aa655a54bb610d62f3a7f5" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Aug 06 09:39:22 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Aug 06 09:39:22 2010 -0700" }, "message": "Merge branch \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (27 commits)\n sched: Use correct macro to display sched_child_runs_first in /proc/sched_debug\n sched: No need for bootmem special cases\n sched: Revert nohz_ratelimit() for now\n sched: Reduce update_group_power() calls\n sched: Update rq-\u003eclock for nohz balanced cpus\n sched: Fix spelling of sibling\n sched, cpuset: Drop __cpuexit from cpu hotplug callbacks\n sched: Fix the racy usage of thread_group_cputimer() in fastpath_timer_check()\n sched: run_posix_cpu_timers: Don\u0027t check -\u003eexit_state, use lock_task_sighand()\n sched: thread_group_cputime: Simplify, document the \"alive\" check\n sched: Remove the obsolete exit_state/signal hacks\n sched: task_tick_rt: Remove the obsolete -\u003esignal !\u003d NULL check\n sched: __sched_setscheduler: Read the RLIMIT_RTPRIO value lockless\n sched: Fix comments to make them DocBook happy\n sched: Fix fix_small_capacity\n powerpc: Exclude arch_sd_sibiling_asym_packing() on UP\n powerpc: Enable asymmetric SMT scheduling on POWER7\n sched: Add asymmetric group packing option for sibling domain\n sched: Fix capacity calculations for SMT4\n sched: Change nohz idle load balancing logic to push model\n ...\n" }, { "commit": "0b2e918aa99fe6c3b8f163aa323a275ad8577828", "tree": "9e979e6ec865e31bbcc3cddf4f18751c48aa1934", "parents": [ "8d1f431cbec115a780cd551ab1b4955c125f8d31" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Mon Jun 21 23:53:31 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Jun 22 08:07:39 2010 +0200" }, "message": "sched, cpuset: Drop __cpuexit from cpu hotplug callbacks\n\nCommit 3a101d05 (sched: adjust when cpu_active and cpuset\nconfigurations are updated during cpu on/offlining) added\nhotplug notifiers marked with __cpuexit; however, ia64 drops\ntext in __cpuexit during link unlike x86.\n\nThis means that functions which are referenced during init but used\nonly for cpu hot unplugging afterwards shouldn\u0027t be marked with\n__cpuexit. Drop __cpuexit from those functions.\n\nReported-by: Tony Luck \u003ctony.luck@intel.com\u003e\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nAcked-by: Tony Luck \u003ctony.luck@intel.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nLKML-Reference: \u003c4C1FDF5B.1040301@kernel.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "f1bbbb6912662b9f6070c5bfc4ca9eb1f06a9d5b", "tree": "c2c130a74be25b0b2dff992e1a195e2728bdaadd", "parents": [ "fd0961ff67727482bb20ca7e8ea97b83e9de2ddb", "7e27d6e778cd87b6f2415515d7127eba53fe5d02" ], "author": { "name": "Jiri Kosina", "email": "jkosina@suse.cz", "time": "Wed Jun 16 18:08:13 2010 +0200" }, "committer": { "name": "Jiri Kosina", "email": "jkosina@suse.cz", "time": "Wed Jun 16 18:08:13 2010 +0200" }, "message": "Merge branch \u0027master\u0027 into for-next\n" }, { "commit": "732bee7af3102cad811fb047dee8d15966efe569", "tree": "1a260fdc7a7155e8b22944dc114af4c2cd56a100", "parents": [ "22c1d8b4f8f04882046ebe592f9a9eaea443cb45" ], "author": { "name": "Uwe Kleine-König", "email": "u.kleine-koenig@pengutronix.de", "time": "Fri Jun 11 12:16:59 2010 +0200" }, "committer": { "name": "Jiri Kosina", "email": "jkosina@suse.cz", "time": "Wed Jun 16 18:03:14 2010 +0200" }, "message": "fix typos concerning \"hierarchy\"\n\nSigned-off-by: Uwe Kleine-König \u003cu.kleine-koenig@pengutronix.de\u003e\nSigned-off-by: Jiri Kosina \u003cjkosina@suse.cz\u003e\n" }, { "commit": "3a101d0548e925ab16ca6aaa8cf4f767d322ddb0", "tree": "b90d8c5f2efe30fcfa49a00fdea037567c6cd46f", "parents": [ "50a323b73069b169385a8ac65633dee837a7d13f" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Jun 08 21:40:36 2010 +0200" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Jun 08 21:40:36 2010 +0200" }, "message": "sched: adjust when cpu_active and cpuset configurations are updated during cpu on/offlining\n\nCurrently, when a cpu goes down, cpu_active is cleared before\nCPU_DOWN_PREPARE starts and cpuset configuration is updated from a\ndefault priority cpu notifier. When a cpu is coming up, it\u0027s set\nbefore CPU_ONLINE but cpuset configuration again is updated from the\nsame cpu notifier.\n\nFor cpu notifiers, this presents an inconsistent state. Threads which\na CPU_DOWN_PREPARE notifier expects to be bound to the CPU can be\nmigrated to other cpus because the cpu is no more inactive.\n\nFix it by updating cpu_active in the highest priority cpu notifier and\ncpuset configuration in the second highest when a cpu is coming up.\nDown path is updated similarly. This guarantees that all other cpu\nnotifiers see consistent cpu_active and cpuset configuration.\n\ncpuset_track_online_cpus() notifier is converted to\ncpuset_update_active_cpus() which just updates the configuration and\nnow called from cpuset_cpu_[in]active() notifiers registered from\nsched_init_smp(). If cpuset is disabled, cpuset_update_active_cpus()\ndegenerates into partition_sched_domains() making separate notifier\nfor !CONFIG_CPUSETS unnecessary.\n\nThis problem is triggered by cmwq. During CPU_DOWN_PREPARE, hotplug\ncallback creates a kthread and kthread_bind()s it to the target cpu,\nand the thread is expected to run on that cpu.\n\n* Ingo\u0027s test discovered __cpuinit/exit markups were incorrect.\n Fixed.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\n" }, { "commit": "6adef3ebe570bcde67fd6c16101451ddde5712b5", "tree": "0f60e2a4d01850ae33aee6cefc7a59845ede89a0", "parents": [ "2c488db27b614816024e7994117f599337de0f34" ], "author": { "name": "Jack Steiner", "email": "steiner@sgi.com", "time": "Wed May 26 14:42:49 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 27 09:12:44 2010 -0700" }, "message": "cpusets: new round-robin rotor for SLAB allocations\n\nWe have observed several workloads running on multi-node systems where\nmemory is assigned unevenly across the nodes in the system. There are\nnumerous reasons for this but one is the round-robin rotor in\ncpuset_mem_spread_node().\n\nFor example, a simple test that writes a multi-page file will allocate\npages on nodes 0 2 4 6 ... Odd nodes are skipped. (Sometimes it\nallocates on odd nodes \u0026 skips even nodes).\n\nAn example is shown below. The program \"lfile\" writes a file consisting\nof 10 pages. The program then mmaps the file \u0026 uses get_mempolicy(...,\nMPOL_F_NODE) to determine the nodes where the file pages were allocated.\nThe output is shown below:\n\n\t# ./lfile\n\t allocated on nodes: 2 4 6 0 1 2 6 0 2\n\nThere is a single rotor that is used for allocating both file pages \u0026 slab\npages. Writing the file allocates both a data page \u0026 a slab page\n(buffer_head). This advances the RR rotor 2 nodes for each page\nallocated.\n\nA quick confirmation seems to confirm this is the cause of the uneven\nallocation:\n\n\t# echo 0 \u003e/dev/cpuset/memory_spread_slab\n\t# ./lfile\n\t allocated on nodes: 6 7 8 9 0 1 2 3 4 5\n\nThis patch introduces a second rotor that is used for slab allocations.\n\nSigned-off-by: Jack Steiner \u003csteiner@sgi.com\u003e\nAcked-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Jack Steiner \u003csteiner@sgi.com\u003e\nCc: Robin Holt \u003cholt@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c0ff7453bb5c7c98e0885fb94279f2571946f280", "tree": "8bb2b169a5145f0496575dbd2f48bb4b1c83f819", "parents": [ "708c1bbc9d0c3e57f40501794d9b0eed29d10fce" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Mon May 24 14:32:08 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 25 08:06:57 2010 -0700" }, "message": "cpuset,mm: fix no node to alloc memory when changing cpuset\u0027s mems\n\nBefore applying this patch, cpuset updates task-\u003emems_allowed and\nmempolicy by setting all new bits in the nodemask first, and clearing all\nold unallowed bits later. But in the way, the allocator may find that\nthere is no node to alloc memory.\n\nThe reason is that cpuset rebinds the task\u0027s mempolicy, it cleans the\nnodes which the allocater can alloc pages on, for example:\n\n(mpol: mempolicy)\n\ttask1\t\t\ttask1\u0027s mpol\ttask2\n\talloc page\t\t1\n\t alloc on node0? NO\t1\n\t\t\t\t1\t\tchange mems from 1 to 0\n\t\t\t\t1\t\trebind task1\u0027s mpol\n\t\t\t\t0-1\t\t set new bits\n\t\t\t\t0\t \t clear disallowed bits\n\t alloc on node1? NO\t0\n\t ...\n\tcan\u0027t alloc page\n\t goto oom\n\nThis patch fixes this problem by expanding the nodes range first(set newly\nallowed bits) and shrink it lazily(clear newly disallowed bits). So we\nuse a variable to tell the write-side task that read-side task is reading\nnodemask, and the write-side task clears newly disallowed nodes after\nread-side task ends the current memory allocation.\n\n[akpm@linux-foundation.org: fix spello]\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\u003e\nCc: Ravikiran Thirumalai \u003ckiran@scalex86.org\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "708c1bbc9d0c3e57f40501794d9b0eed29d10fce", "tree": "4b19caf68c420b32abdf05af3d413b1320f04fbe", "parents": [ "971ada0f6659488c3f36aed4c6f7670ff5ce4368" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Mon May 24 14:32:07 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 25 08:06:57 2010 -0700" }, "message": "mempolicy: restructure rebinding-mempolicy functions\n\nNick Piggin reported that the allocator may see an empty nodemask when\nchanging cpuset\u0027s mems[1]. It happens only on the kernel that do not do\natomic nodemask_t stores. (MAX_NUMNODES \u003e BITS_PER_LONG)\n\nBut I found that there is also a problem on the kernel that can do atomic\nnodemask_t stores. The problem is that the allocator can\u0027t find a node to\nalloc page when changing cpuset\u0027s mems though there is a lot of free\nmemory. The reason is like this:\n\n(mpol: mempolicy)\n\ttask1\t\t\ttask1\u0027s mpol\ttask2\n\talloc page\t\t1\n\t alloc on node0? NO\t1\n\t\t\t\t1\t\tchange mems from 1 to 0\n\t\t\t\t1\t\trebind task1\u0027s mpol\n\t\t\t\t0-1\t\t set new bits\n\t\t\t\t0\t \t clear disallowed bits\n\t alloc on node1? NO\t0\n\t ...\n\tcan\u0027t alloc page\n\t goto oom\n\nI can use the attached program reproduce it by the following step:\n\n# mkdir /dev/cpuset\n# mount -t cpuset cpuset /dev/cpuset\n# mkdir /dev/cpuset/1\n# echo `cat /dev/cpuset/cpus` \u003e /dev/cpuset/1/cpus\n# echo `cat /dev/cpuset/mems` \u003e /dev/cpuset/1/mems\n# echo $$ \u003e /dev/cpuset/1/tasks\n# numactl --membind\u003d`cat /dev/cpuset/mems` ./cpuset_mem_hog \u003cnr_tasks\u003e \u0026\n \u003cnr_tasks\u003e \u003d max(nr_cpus - 1, 1)\n# killall -s SIGUSR1 cpuset_mem_hog\n# ./change_mems.sh\n\nseveral hours later, oom will happen though there is a lot of free memory.\n\nThis patchset fixes this problem by expanding the nodes range first(set\nnewly allowed bits) and shrink it lazily(clear newly disallowed bits). So\nwe use a variable to tell the write-side task that read-side task is\nreading nodemask, and the write-side task clears newly disallowed nodes\nafter read-side task ends the current memory allocation.\n\nThis patch:\n\nIn order to fix no node to alloc memory, when we want to update mempolicy\nand mems_allowed, we expand the set of nodes first (set all the newly\nnodes) and shrink the set of nodes lazily(clean disallowed nodes), But the\nmempolicy\u0027s rebind functions may breaks the expanding.\n\nSo we restructure the mempolicy\u0027s rebind functions and split the rebind\nwork to two steps, just like the update of cpuset\u0027s mems: The 1st step:\nexpand the set of the mempolicy\u0027s nodes. The 2nd step: shrink the set of\nthe mempolicy\u0027s nodes. It is used when there is no real lock to protect\nthe mempolicy in the read-side. Otherwise we can do rebind work at once.\n\nIn order to implement it, we define\n\n\tenum mpol_rebind_step {\n\t\tMPOL_REBIND_ONCE,\n\t\tMPOL_REBIND_STEP1,\n\t\tMPOL_REBIND_STEP2,\n\t\tMPOL_REBIND_NSTEP,\n\t};\n\nIf the mempolicy needn\u0027t be updated by two steps, we can pass\nMPOL_REBIND_ONCE to the rebind functions. Or we can pass\nMPOL_REBIND_STEP1 to do the first step of the rebind work and pass\nMPOL_REBIND_STEP2 to do the second step work.\n\nBesides that, it maybe long time between these two step and we have to\nrelease the lock that protects mempolicy and mems_allowed. If we hold the\nlock once again, we must check whether the current mempolicy is under the\nrebinding (the first step has been done) or not, because the task may\nalloc a new mempolicy when we don\u0027t hold the lock. So we defined the\nfollowing flag to identify it:\n\n#define MPOL_F_REBINDING (1 \u003c\u003c 2)\n\nThe new functions will be used in the next patch.\n\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\u003e\nCc: Ravikiran Thirumalai \u003ckiran@scalex86.org\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9084bb8246ea935b98320554229e2f371f7f52fa", "tree": "8478d18125e3b4a7e0a31d702647dee1830d23ef", "parents": [ "6a1bdc1b577ebcb65f6603c57f8347309bc4ab13" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Mar 15 10:10:27 2010 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Apr 02 20:12:03 2010 +0200" }, "message": "sched: Make select_fallback_rq() cpuset friendly\n\nIntroduce cpuset_cpus_allowed_fallback() helper to fix the cpuset problems\nwith select_fallback_rq(). It can be called from any context and can\u0027t use\nany cpuset locks including task_lock(). It is called when the task doesn\u0027t\nhave online cpus in -\u003ecpus_allowed but ttwu/etc must be able to find a\nsuitable cpu.\n\nI am not proud of this patch. Everything which needs such a fat comment\ncan\u0027t be good even if correct. But I\u0027d prefer to not change the locking\nrules in the code I hardly understand, and in any case I believe this\nsimple change make the code much more correct compared to deadlocks we\ncurrently have.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c20100315091027.GA9155@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "897f0b3c3ff40b443c84e271bef19bd6ae885195", "tree": "6b969149bb59591a1c9485de405639db6c4208d6", "parents": [ "25c2d55c00c6097e6792ebf21e31342f23b9b768" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Mar 15 10:10:03 2010 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Apr 02 20:12:01 2010 +0200" }, "message": "sched: Kill the broken and deadlockable cpuset_lock/cpuset_cpus_allowed_locked code\n\nThis patch just states the fact the cpusets/cpuhotplug interaction is\nbroken and removes the deadlockable code which only pretends to work.\n\n- cpuset_lock() doesn\u0027t really work. It is needed for\n cpuset_cpus_allowed_locked() but we can\u0027t take this lock in\n try_to_wake_up()-\u003eselect_fallback_rq() path.\n\n- cpuset_lock() is deadlockable. Suppose that a task T bound to CPU takes\n callback_mutex. If cpu_down(CPU) happens before T drops callback_mutex\n stop_machine() preempts T, then migration_call(CPU_DEAD) tries to take\n cpuset_lock() and hangs forever because CPU is already dead and thus\n T can\u0027t be scheduled.\n\n- cpuset_cpus_allowed_locked() is deadlockable too. It takes task_lock()\n which is not irq-safe, but try_to_wake_up() can be called from irq.\n\nKill them, and change select_fallback_rq() to use cpu_possible_mask, like\nwe currently do without CONFIG_CPUSETS.\n\nAlso, with or without this patch, with or without CONFIG_CPUSETS, the\ncallers of select_fallback_rq() can race with each other or with\nset_cpus_allowed() pathes.\n\nThe subsequent patches try to to fix these problems.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c20100315091003.GA9123@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "53feb29767c29c877f9d47dcfe14211b5b0f7ebd", "tree": "0416744ece6b7fd667bef355434ed9157fe67b2a", "parents": [ "5ab116c9349ef52d6fbd2e2917a53f13194b048e" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Tue Mar 23 13:35:35 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 24 16:31:21 2010 -0700" }, "message": "cpuset: alloc nodemask_t on the heap rather than the stack\n\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5ab116c9349ef52d6fbd2e2917a53f13194b048e", "tree": "636a6cf02d5ca47c6da5d4935b07ddf08666a09c", "parents": [ "5574169613b40b85d6f4c67208fa4846b897a0a1" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Tue Mar 23 13:35:34 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 24 16:31:21 2010 -0700" }, "message": "cpuset: fix the problem that cpuset_mem_spread_node() returns an offline node\n\ncpuset_mem_spread_node() returns an offline node, and causes an oops.\n\nThis patch fixes it by initializing task-\u003emems_allowed to\nnode_states[N_HIGH_MEMORY], and updating task-\u003emems_allowed when doing\nmemory hotplug.\n\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nReported-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nTested-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6ad4c18884e864cf4c77f9074d3d1816063f99cd", "tree": "f09643f6148b576fa2d23bf7d4b37d082d94e267", "parents": [ "e1b8090bdf125f8b2e192149547fead7f302a89c" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Wed Nov 25 13:31:39 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Dec 06 21:10:56 2009 +0100" }, "message": "sched: Fix balance vs hotplug race\n\nSince (e761b77: cpu hotplug, sched: Introduce cpu_active_map and redo\nsched domain managment) we have cpu_active_mask which is suppose to rule\nscheduler migration and load-balancing, except it never (fully) did.\n\nThe particular problem being solved here is a crash in try_to_wake_up()\nwhere select_task_rq() ends up selecting an offline cpu because\nselect_task_rq_fair() trusts the sched_domain tree to reflect the\ncurrent state of affairs, similarly select_task_rq_rt() trusts the\nroot_domain.\n\nHowever, the sched_domains are updated from CPU_DEAD, which is after the\ncpu is taken offline and after stop_machine is done. Therefore it can\nrace perfectly well with code assuming the domains are right.\n\nCure this by building the domains from cpu_active_mask on\nCPU_DOWN_PREPARE.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "e1b8090bdf125f8b2e192149547fead7f302a89c", "tree": "76cfb31f2b1c17953c02afa5cbbc683a6d01869d", "parents": [ "6ec22f9b037fc0c2e00ddb7023fad279c365324d" ], "author": { "name": "Geert Uytterhoeven", "email": "geert@linux-m68k.org", "time": "Sun Dec 06 20:41:16 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Dec 06 21:08:41 2009 +0100" }, "message": "cpumask: Fix generate_sched_domains() for UP\n\nCommit acc3f5d7cabbfd6cec71f0c1f9900621fa2d6ae7 (\"cpumask:\nPartition_sched_domains takes array of cpumask_var_t\") changed\nthe function signature of generate_sched_domains() for the\nCONFIG_SMP\u003dy case, but forgot to update the corresponding\nfunction for the CONFIG_SMP\u003dn case, causing:\n\n kernel/cpuset.c:2073: warning: passing argument 1 of \u0027generate_sched_domains\u0027 from incompatible pointer type\n\nSigned-off-by: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nLKML-Reference: \u003calpine.DEB.2.00.0912062038070.5693@ayla.of.borg\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "acc3f5d7cabbfd6cec71f0c1f9900621fa2d6ae7", "tree": "672ed45f6df2f52e8f3cced2ee11ad29a1533890", "parents": [ "e2c880630438f80b474378d5487b511b07665051" ], "author": { "name": "Rusty Russell", "email": "rusty@rustcorp.com.au", "time": "Tue Nov 03 14:53:40 2009 +1030" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Nov 04 13:16:40 2009 +0100" }, "message": "cpumask: Partition_sched_domains takes array of cpumask_var_t\n\nCurrently partition_sched_domains() takes a \u0027struct cpumask\n*doms_new\u0027 which is a kmalloc\u0027ed array of cpumask_t. You can\u0027t\nhave such an array if \u0027struct cpumask\u0027 is undefined, as we plan\nfor CONFIG_CPUMASK_OFFSTACK\u003dy.\n\nSo, we make this an array of cpumask_var_t instead: this is the\nsame for the CONFIG_CPUMASK_OFFSTACK\u003dn case, but requires\nmultiple allocations for the CONFIG_CPUMASK_OFFSTACK\u003dy case.\nHence we add alloc_sched_domains() and free_sched_domains()\nfunctions.\n\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nLKML-Reference: \u003c200911031453.40668.rusty@rustcorp.com.au\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "0b9e31e9264f1bad89856afb96da1688292f13b4", "tree": "7a9e9b6456dce993efeed8734de0a15a1f16ae94", "parents": [ "cf82ff7ea7695b0e82ba07bc5e9f1bd03a74e1aa", "964fe080d94db82a3268443e9b9ece4c60246414" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Oct 25 17:30:53 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Oct 25 17:30:53 2009 +0100" }, "message": "Merge branch \u0027linus\u0027 into sched/core\n\nConflicts:\n\tfs/proc/array.c\n\nMerge reason: resolve conflict and queue up dependent patch.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "be367d09927023d081f9199665c8500f69f14d22", "tree": "f0c5b9da037506da3c5890cf11b51b39a7d3c427", "parents": [ "c378369d8b4fa516ff2b1e79c3eded4e0e955ebb" ], "author": { "name": "Ben Blum", "email": "bblum@google.com", "time": "Wed Sep 23 15:56:31 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:20:58 2009 -0700" }, "message": "cgroups: let ss-\u003ecan_attach and ss-\u003eattach do whole threadgroups at a time\n\nAlter the ss-\u003ecan_attach and ss-\u003eattach functions to be able to deal with\na whole threadgroup at a time, for use in cgroup_attach_proc. (This is a\npre-patch to cgroup-procs-writable.patch.)\n\nCurrently, new mode of the attach function can only tell the subsystem\nabout the old cgroup of the threadgroup leader. No subsystem currently\nneeds that information for each thread that\u0027s being moved, but if one were\nto be added (for example, one that counts tasks within a group) this bit\nwould need to be reworked a bit to tell the subsystem the right\ninformation.\n\n[hidave.darkstar@gmail.com: fix build]\nSigned-off-by: Ben Blum \u003cbblum@google.com\u003e\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nReviewed-by: Matt Helsley \u003cmatthltc@us.ibm.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Dave Young \u003chidave.darkstar@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": "d01d4827858cdc2e1c437c87ab65ec0a00fd40f8", "tree": "433ed8bfdf144887129e9b0ea625c99780bedfd6", "parents": [ "0d721ceadbeaa24d7f9dd41b3e5e29912327a7e1" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Mon Sep 21 11:06:27 2009 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Sep 21 11:37:27 2009 +0200" }, "message": "sched: Always show Cpus_allowed field in /proc/\u003cpid\u003e/status\n\nThe Cpus_allowed fields in /proc/\u003cpid\u003e/status is currently only\nshown in case of CONFIG_CPUSETS. However their contents are also\nuseful for the !CONFIG_CPUSETS case.\n\nSo change the current behaviour and always show these fields.\n\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c20090921090627.GD4649@osiris.boeblingen.de.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "58568d2a8215cb6f55caf2332017d7bdff954e1c", "tree": "ffcdee457494ac78d6550b0aeac86536ca152e7b", "parents": [ "950592f7b991f267d707d372b90f508bbe72acbc" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Tue Jun 16 15:31:49 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:31 2009 -0700" }, "message": "cpuset,mm: update tasks\u0027 mems_allowed in time\n\nFix allocating page cache/slab object on the unallowed node when memory\nspread is set by updating tasks\u0027 mems_allowed after its cpuset\u0027s mems is\nchanged.\n\nIn order to update tasks\u0027 mems_allowed in time, we must modify the code of\nmemory policy. Because the memory policy is applied in the process\u0027s\ncontext originally. After applying this patch, one task directly\nmanipulates anothers mems_allowed, and we use alloc_lock in the\ntask_struct to protect mems_allowed and memory policy of the task.\n\nBut in the fast path, we didn\u0027t use lock to protect them, because adding a\nlock may lead to performance regression. But if we don\u0027t add a lock,the\ntask might see no nodes when changing cpuset\u0027s mems_allowed to some\nnon-overlapping set. In order to avoid it, we set all new allowed nodes,\nthen clear newly disallowed ones.\n\n[lee.schermerhorn@hp.com:\n The rework of mpol_new() to extract the adjusting of the node mask to\n apply cpuset and mpol flags \"context\" breaks set_mempolicy() and mbind()\n with MPOL_PREFERRED and a NULL nodemask--i.e., explicit local\n allocation. Fix this by adding the check for MPOL_PREFERRED and empty\n node mask to mpol_new_mpolicy().\n\n Remove the now unneeded \u0027nodes \u003d NULL\u0027 from mpol_new().\n\n Note that mpol_new_mempolicy() is always called with a non-NULL\n \u0027nodes\u0027 parameter now that it has been removed from mpol_new().\n Therefore, we don\u0027t need to test nodes for NULL before testing it for\n \u0027empty\u0027. However, just to be extra paranoid, add a VM_BUG_ON() to\n verify this assumption.]\n[lee.schermerhorn@hp.com:\n\n I don\u0027t think the function name \u0027mpol_new_mempolicy\u0027 is descriptive\n enough to differentiate it from mpol_new().\n\n This function applies cpuset set context, usually constraining nodes\n to those allowed by the cpuset. However, when the \u0027RELATIVE_NODES flag\n is set, it also translates the nodes. So I settled on\n \u0027mpol_set_nodemask()\u0027, because the comment block for mpol_new() mentions\n that we need to call this function to \"set nodes\".\n\n Some additional minor line length, whitespace and typo cleanup.]\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "950592f7b991f267d707d372b90f508bbe72acbc", "tree": "b57ef015ff5cd54d8ab21005b466c80e9ccfa9e3", "parents": [ "f3b39d47ebc51416fc3b690a32dfe030a2035e67" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Tue Jun 16 15:31:47 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:31 2009 -0700" }, "message": "cpusets: update tasks\u0027 page/slab spread flags in time\n\nFix the bug that the kernel didn\u0027t spread page cache/slab object evenly\nover all the allowed nodes when spread flags were set by updating tasks\u0027\npage/slab spread flags in time.\n\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\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": "f3b39d47ebc51416fc3b690a32dfe030a2035e67", "tree": "98873bacc74c60407ba3e93337d12351f35711e3", "parents": [ "dcf975d58565880a134afb13bde511d1b873ce79" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Tue Jun 16 15:31:46 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:31 2009 -0700" }, "message": "cpusets: restructure the function cpuset_update_task_memory_state()\n\nThe kernel still allocates the page caches on old node after modifying its\ncpuset\u0027s mems when \u0027memory_spread_page\u0027 was set, or it didn\u0027t spread the\npage cache evenly over all the nodes that faulting task is allowed to usr\nafter memory_spread_page was set. it is caused by the old mem_allowed and\nflags of the task, the current kernel doesn\u0027t updates them unless some\nfunction invokes cpuset_update_task_memory_state(), it is too late\nsometimes.We must update the mem_allowed and the flags of the tasks in\ntime.\n\nSlab has the same problem.\n\nThe following patches fix this bug by updating tasks\u0027 mem_allowed and\nspread flag after its cpuset\u0027s mems or spread flag is changed.\n\nThis patch:\n\nExtract a function from cpuset_update_task_memory_state(). It will be\nused later for update tasks\u0027 page/slab spread flags after its cpuset\u0027s\nflag is set\n\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\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": "38c7fed2f5ffee17e1fa3e0f78b0e1bf43d52d13", "tree": "52544d8dcfadbd5347872eae23939fe387d7c78b", "parents": [ "a5f4f52e82114e85aa1a066bd1a450acc19a464d" ], "author": { "name": "Yinghai Lu", "email": "yinghai@kernel.org", "time": "Mon May 25 15:10:58 2009 +0300" }, "committer": { "name": "Pekka Enberg", "email": "penberg@cs.helsinki.fi", "time": "Thu Jun 11 19:27:07 2009 +0300" }, "message": "x86: remove some alloc_bootmem_cpumask_var calling\n\nNow that we set up the slab allocator earlier, we can get rid of some\nalloc_bootmem_cpumask_var() calls in boot code.\n\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nSigned-off-by: Yinghai Lu \u003cyinghai@kernel.org\u003e\nSigned-off-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\n" }, { "commit": "6d7b2f5f9e88902b19f91d0c8a7ef58a5455f1a2", "tree": "4ad594fcef55ad95424e58c39e10a723d1dcbe4f", "parents": [ "db7f47cf4805e30decb0841764b21b7c4000f7dc" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Thu Apr 02 16:57:57 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:57 2009 -0700" }, "message": "cpusets: prevent PF_THREAD_BOUND tasks from attaching to non-root cpusets\n\nKthreads that have the PF_THREAD_BOUND bit set in their flags are bound to a\nspecific cpu. Thus, their set of allowed cpus shall not change.\n\nThis patch prevents such threads from attaching to non-root cpusets. They do\nnot have mempolicies that restrict them to a subset of system nodes and, since\ntheir cpumask may never change, they cannot use any of the features of\ncpusets.\n\nThe tasks will forever be a member of the root cpuset and will be returned\nwhen listing the tasks attached to that cpuset.\n\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Dhaval Giani \u003cdhaval@linux.vnet.ibm.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "db7f47cf4805e30decb0841764b21b7c4000f7dc", "tree": "10a7ee574ae29fbd3c78a22bd6700e14efe80e65", "parents": [ "a1bc5a4eee990a1f290735c8694d0aebdad095fa" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Thu Apr 02 16:57:55 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:57 2009 -0700" }, "message": "cpusets: allow cpusets to be configured/built on non-SMP systems\n\nAllow cpusets to be configured/built on non-SMP systems\n\nCurrently it\u0027s impossible to build cpusets under UML on x86-64, since\ncpusets depends on SMP and x86-64 UML doesn\u0027t support SMP.\n\nThere\u0027s code in cpusets that doesn\u0027t depend on SMP. This patch surrounds\nthe minimum amount of cpusets code with #ifdef CONFIG_SMP in order to\nallow cpusets to build/run on UP systems (for testing purposes under UML).\n\nReviewed-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a1bc5a4eee990a1f290735c8694d0aebdad095fa", "tree": "f3e5849823444136df9c7f91f7217e1894235682", "parents": [ "7f81b1ae18416b457e4d5ff23f0bd598e8a42224" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Thu Apr 02 16:57:54 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:57 2009 -0700" }, "message": "cpusets: replace zone allowed functions with node allowed\n\nThe cpuset_zone_allowed() variants are actually only a function of the\nzone\u0027s node.\n\nCc: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7f81b1ae18416b457e4d5ff23f0bd598e8a42224", "tree": "8b484cec5b67d4cf00dfacd407b2648cd0d1b645", "parents": [ "010cfac4ca0f9e85f54ba2117a372e72f4fb9a60" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Thu Apr 02 16:57:53 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:57 2009 -0700" }, "message": "cpuset: remove struct cpuset_hotplug_scanner\n\nUse cgroup_scanner.data, instead of introducing cpuset_hotplug_scanner.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "010cfac4ca0f9e85f54ba2117a372e72f4fb9a60", "tree": "47b8ed65b2e3cdfe269794545995020947a667a6", "parents": [ "3b6766fe668b83c8a03c6ed01bcc2ac77cbae848" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Thu Apr 02 16:57:52 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:57 2009 -0700" }, "message": "cpuset: avoid changing cpuset\u0027s mems when errno returned\n\nWhen writing to cpuset.mems, cpuset has to update its mems_allowed before\ncalling update_tasks_nodemask(), but this function might return -ENOMEM.\n\nTo avoid this rare case, we allocate the memory before changing\nmems_allowed, and then pass to update_tasks_nodemask(). Similar to what\nupdate_cpumask() does.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3b6766fe668b83c8a03c6ed01bcc2ac77cbae848", "tree": "8b109576301d849406f080c61f4ce1809556ad0b", "parents": [ "bd1a8ab73edd449fecda633449cc277b856ad4f5" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Thu Apr 02 16:57:51 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:57 2009 -0700" }, "message": "cpuset: rewrite update_tasks_nodemask()\n\nThis patch uses cgroup_scan_tasks() to rebind tasks\u0027 vmas to new cpuset\u0027s\nmems_allowed.\n\nNot only simplify the code largely, but also avoid allocating an array to\nhold mm pointers of all the tasks in the cpuset. This array can be big\n(size \u003e PAGESIZE) if we have lots of tasks in that cpuset, thus has a\nchance to fail the allocation when under memory stress.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "0b4217b3fdddc4a58939720d3ed809537577d48b", "tree": "9bda180eb4e9fed454453b4aeaf9447602c74022", "parents": [ "83aae4c737866da3280f51fd15da58eddd788397" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Thu Apr 02 16:57:49 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:56 2009 -0700" }, "message": "cpuset: fix possible races in cpu/memory hotplug\n\nChange to cpuset-\u003ecpus_allowed and cpuset-\u003emems_allowed should be protected\nby callback_mutex, otherwise the reader may read wrong cpus/mems. This is\ncpuset\u0027s lock rule.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "099fca3225b39f7a3ed853036038054172b55581", "tree": "c7a8863f9ca8a5c745297e9ee43b63494b6022d1", "parents": [ "b6719ec1ad54e47e40633b19703f2c1254708842" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Thu Apr 02 16:57:29 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:54 2009 -0700" }, "message": "cgroups: show correct file mode\n\nWe have some read-only files and write-only files, but currently they are\nall set to 0644, which is counter-intuitive and cause trouble for some\ncgroup tools like libcgroup.\n\nThis patch adds \u0027mode\u0027 to struct cftype to allow cgroup subsys to set it\u0027s\nown files\u0027 file mode, and for the most cases cft-\u003emode can be default to 0\nand cgroup will figure out proper mode.\n\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: 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": "f90d4118bacef87894621a3e8aba853fa0c89abc", "tree": "d09a52848f5d82fc3944818f62166fee23fabc66", "parents": [ "f3b8436ad9a8ad36b3c9fa1fe030c7f38e5d3d0b" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Fri Jan 16 10:24:10 2009 +0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jan 19 02:44:00 2009 +0100" }, "message": "cpuset: fix possible deadlock in async_rebuild_sched_domains\n\nLockdep reported some possible circular locking info when we tested cpuset on\nNUMA/fake NUMA box.\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\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[ INFO: possible circular locking dependency detected ]\n2.6.29-rc1-00224-ga652504 #111\n-------------------------------------------------------\nbash/2968 is trying to acquire lock:\n (events){--..}, at: [\u003cffffffff8024c8cd\u003e] flush_work+0x24/0xd8\n\nbut task is already holding lock:\n (cgroup_mutex){--..}, at: [\u003cffffffff8026ad1e\u003e] cgroup_lock_live_group+0x12/0x29\n\nwhich lock already depends on the new lock.\n......\n-------------------------------------------------------\n\nSteps to reproduce:\n# mkdir /dev/cpuset\n# mount -t cpuset xxx /dev/cpuset\n# mkdir /dev/cpuset/0\n# echo 0 \u003e /dev/cpuset/0/cpus\n# echo 0 \u003e /dev/cpuset/0/mems\n# echo 1 \u003e /dev/cpuset/0/memory_migrate\n# cat /dev/zero \u003e /dev/null \u0026\n# echo $! \u003e /dev/cpuset/0/tasks\n\nThis is because async_rebuild_sched_domains has the following lock sequence:\nrun_workqueue(async_rebuild_sched_domains)\n\t-\u003e do_rebuild_sched_domains -\u003e cgroup_lock\n\nBut, attaching tasks when memory_migrate is set has following:\ncgroup_lock_live_group(cgroup_tasks_write)\n\t-\u003e do_migrate_pages -\u003e flush_work\n\nThis patch fixes it by using a separate workqueue thread.\n\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "45ce80fb6b6f9594d1396d44dd7e7c02d596fef8", "tree": "2409270f7073c08329ac01c82df0509a264af48c", "parents": [ "23964d2d02984d44aeb2d84d7ffb3359e728df43" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Thu Jan 15 13:50:59 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 15 16:39:37 2009 -0800" }, "message": "cgroups: consolidate cgroup documents\n\nMove Documentation/cpusets.txt and Documentation/controllers/* to\nDocumentation/cgroups/\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nAcked-by: 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": "6af866af34a96fed24a55979a78b6f73bd4e8e87", "tree": "e0c4b27ce3b684ebb2f6fa3685051e01a86d7354", "parents": [ "300ed6cbb70718872cb4936d1d22ef295f9ba44d" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Jan 07 18:08:45 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:11 2009 -0800" }, "message": "cpuset: remove remaining pointers to cpumask_t\n\nImpact: cleanups, use new cpumask API\n\nFinal trivial cleanups: mainly s/cpumask_t/struct cpumask\n\nNote there is a FIXME in generate_sched_domains(). A future patch will\nchange struct cpumask *doms to struct cpumask *doms[].\n(I suppose Rusty will do this.)\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nAcked-by: Mike Travis \u003ctravis@sgi.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": "300ed6cbb70718872cb4936d1d22ef295f9ba44d", "tree": "56a1dd86be2d6e35b329131ef353a44b929bd53c", "parents": [ "645fcc9d2f6946f97a41c8d00edee38f8a6f0060" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Jan 07 18:08:44 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:11 2009 -0800" }, "message": "cpuset: convert cpuset-\u003ecpus_allowed to cpumask_var_t\n\nImpact: use new cpumask API\n\nThis patch mainly does the following things:\n- change cs-\u003ecpus_allowed from cpumask_t to cpumask_var_t\n- call alloc_bootmem_cpumask_var() for top_cpuset in cpuset_init_early()\n- call alloc_cpumask_var() for other cpusets\n- replace cpus_xxx() to cpumask_xxx()\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nAcked-by: Mike Travis \u003ctravis@sgi.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": "645fcc9d2f6946f97a41c8d00edee38f8a6f0060", "tree": "1d7ad63c9e1bace8f0ccac8814be04af92441ebf", "parents": [ "2341d1b6598c7146d64a5050b53a72a5a819617f" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Jan 07 18:08:43 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:11 2009 -0800" }, "message": "cpuset: don\u0027t allocate trial cpuset on stack\n\nImpact: cleanups, reduce stack usage\n\nThis patch prepares for the next patch. When we convert\ncpuset.cpus_allowed to cpumask_var_t, (trialcs \u003d *cs) no longer works.\n\nAnother result of this patch is reducing stack usage of trialcs.\nsizeof(*cs) can be as large as 148 bytes on x86_64, so it\u0027s really not\ngood to have it on stack.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nAcked-by: Mike Travis \u003ctravis@sgi.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": "2341d1b6598c7146d64a5050b53a72a5a819617f", "tree": "1e278566d5fea4d2c02826b9ac0713ccd146fd92", "parents": [ "5771f0a2236df69683e9abea87f35f522c97ff94" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Jan 07 18:08:42 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:11 2009 -0800" }, "message": "cpuset: convert cpuset_attach() to use cpumask_var_t\n\nImpact: reduce stack usage\n\nAllocate a global cpumask_var_t at boot, and use it in cpuset_attach(), so\nwe won\u0027t fail cpuset_attach().\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nAcked-by: Mike Travis \u003ctravis@sgi.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": "5771f0a2236df69683e9abea87f35f522c97ff94", "tree": "afc960ceac00ab20f2139496e4fa9feeea516467", "parents": [ "5a7625df725a486ad600b0036b6111dbd6321c41" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Jan 07 18:08:41 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:11 2009 -0800" }, "message": "cpuset: remove on stack cpumask_t in cpuset_can_attach()\n\nImpact: reduce stack usage\n\nJust use cs-\u003ecpus_allowed, and no need to allocate a cpumask_var_t.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujistu.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nAcked-by: Mike Travis \u003ctravis@sgi.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": "5a7625df725a486ad600b0036b6111dbd6321c41", "tree": "a1b9c81371a6dffbed4a313ec25df33134925af2", "parents": [ "f5813d94279a18ff5936d675e24b44b44a571197" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Jan 07 18:08:41 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:11 2009 -0800" }, "message": "cpuset: remove on stack cpumask_t in cpuset_sprintf_cpulist()\n\nThis patchset converts cpuset to use new cpumask API, and thus\nremove on stack cpumask_t to reduce stack usage.\n\nBefore:\n # cat kernel/cpuset.c include/linux/cpuset.h | grep -c cpumask_t\n 21\nAfter:\n # cat kernel/cpuset.c include/linux/cpuset.h | grep -c cpumask_t\n 0\n\nThis patch:\n\nImpact: reduce stack usage\n\nIt\u0027s safe to call cpulist_scnprintf inside callback_mutex, and thus we can\njust remove the cpumask_t and no need to allocate a cpumask_var_t.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nAcked-by: Mike Travis \u003ctravis@sgi.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": "f5813d94279a18ff5936d675e24b44b44a571197", "tree": "0c565bd5535f0f5623984e65403bda9c41b3a148", "parents": [ "13337714f3b0307dc7f75ef5d83ecf0db2abbd65" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Wed Jan 07 18:08:40 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:11 2009 -0800" }, "message": "cpusets: set task\u0027s cpu_allowed to cpu_possible_map when attaching it into top cpuset\n\nI found a bug on my dual-cpu box. I created a sub cpuset in top cpuset\nand assign 1 to its cpus. And then we attach some tasks into this sub\ncpuset. After this, we offline CPU1. Now, the tasks in this new cpuset\nare moved into top cpuset automatically because there is no cpu in sub\ncpuset. Then we online CPU1, we find all the tasks which doesn\u0027t belong\nto top cpuset originally just run on CPU0.\n\nWe fix this bug by setting task\u0027s cpu_allowed to cpu_possible_map when\nattaching it into top cpuset. This method needn\u0027t modify the current\nbehavior of cpusets on CPU hotplug, and all of tasks in top cpuset use\ncpu_possible_map to initialize their cpu_allowed.\n\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.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": "13337714f3b0307dc7f75ef5d83ecf0db2abbd65", "tree": "f76dd8961b9287b25e2ea24d2d34fecc52d2c8a0", "parents": [ "e7c5ec9193d32b9559a3bb8893ceedbda85201ff" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Wed Jan 07 18:08:39 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:11 2009 -0800" }, "message": "cpuset: rcu_read_lock() to protect task_cs()\n\ntask_cs() calls task_subsys_state().\n\nWe must use rcu_read_lock() to protect cgroup_subsys_state().\n\nIt\u0027s correct that top_cpuset is never freed, but cgroup_subsys_state()\naccesses css_set, this css_set maybe freed when task_cs() called.\n\nWe use use rcu_read_lock() to protect it.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\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": "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": "29c0177e6a4ac094302bed54a1d4bbb6b740a9ef", "tree": "d8ee57c5b40baa3f53d607b719344dd20f8c85a0", "parents": [ "98a79d6a50181ca1ecf7400eda01d5dc1bc0dbf0" ], "author": { "name": "Rusty Russell", "email": "rusty@rustcorp.com.au", "time": "Sat Dec 13 21:20:25 2008 +1030" }, "committer": { "name": "Rusty Russell", "email": "rusty@rustcorp.com.au", "time": "Sat Dec 13 21:20:25 2008 +1030" }, "message": "cpumask: change cpumask_scnprintf, cpumask_parse_user, cpulist_parse, and cpulist_scnprintf to take pointers.\n\nImpact: change calling convention of existing cpumask APIs\n\nMost cpumask functions started with cpus_: these have been replaced by\ncpumask_ ones which take struct cpumask pointers as expected.\n\nThese four functions don\u0027t have good replacement names; fortunately\nthey\u0027re rarely used, so we just change them over.\n\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Mike Travis \u003ctravis@sgi.com\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: paulus@samba.org\nCc: mingo@redhat.com\nCc: tony.luck@intel.com\nCc: ralf@linux-mips.org\nCc: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\nCc: cl@linux-foundation.org\nCc: srostedt@redhat.com\n" }, { "commit": "1583715ddb61f822041807a0f18b3b4845e88c76", "tree": "cdc54eb7c0105197560641745059db7c20166eec", "parents": [ "4cd4262034849da01eb88659af677b69f8169f06" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Nov 25 10:27:49 2008 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat Nov 29 20:39:29 2008 +0100" }, "message": "sched, cpusets: fix warning in kernel/cpuset.c\n\nthis warning:\n\n kernel/cpuset.c: In function ‘generate_sched_domains’:\n kernel/cpuset.c:588: warning: ‘ndoms’ may be used uninitialized in this function\n\ntriggers because GCC does not recognize that ndoms stays uninitialized\nonly if doms is NULL - but that flow is covered at the end of\ngenerate_sched_domains().\n\nHelp out GCC by initializing this variable to 0. (that\u0027s prudent anyway)\n\nAlso, this function needs a splitup and code flow simplification:\nwith 160 lines length it\u0027s clearly too long.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "f481891fdc49d3d1b8a9674a1825d183069a805f", "tree": "4f027a1321dcd06165394d0a23e49df51c8befc1", "parents": [ "ac97b9f9a2d0b83488e0bbcb8517b229d5c9b142" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Wed Nov 19 15:36:30 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Nov 19 18:49:58 2008 -0800" }, "message": "cpuset: update top cpuset\u0027s mems after adding a node\n\nAfter adding a node into the machine, top cpuset\u0027s mems isn\u0027t updated.\n\nBy reviewing the code, we found that the update function\n\n cpuset_track_online_nodes()\n\nwas invoked after node_states[N_ONLINE] changes. It is wrong because\nN_ONLINE just means node has pgdat, and if node has/added memory, we use\nN_HIGH_MEMORY. So, We should invoke the update function after\nnode_states[N_HIGH_MEMORY] changes, just like its commit says.\n\nThis patch fixes it. And we use notifier of memory hotplug instead of\ndirect calling of cpuset_track_online_nodes().\n\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nAcked-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Paul Menage \u003cmenage@google.com\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "700018e0a77b4113172257fcdaa1c58e27a5074f", "tree": "60ea1cc7682b19203e1caab15ebb2285153eeee7", "parents": [ "ad133ba3dc283300e5b62b5b7211d2f39fbf6ee7" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Nov 18 14:02:03 2008 +0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Nov 18 08:44:51 2008 +0100" }, "message": "cpuset: fix regression when failed to generate sched domains\n\nImpact: properly rebuild sched-domains on kmalloc() failure\n\nWhen cpuset failed to generate sched domains due to kmalloc()\nfailure, the scheduler should fallback to the single partition\n\u0027fallback_doms\u0027 and rebuild sched domains, but now it only\ndestroys but not rebuilds sched domains.\n\nThe regression was introduced by:\n\n| commit dfb512ec4834116124da61d6c1ee10fd0aa32bd6\n| Author: Max Krasnyansky \u003cmaxk@qualcomm.com\u003e\n| Date: Fri Aug 29 13:11:41 2008 -0700\n|\n| sched: arch_reinit_sched_domains() must destroy domains to force rebuild\n\nAfter the above commit, partition_sched_domains(0, NULL, NULL) will\nonly destroy sched domains and partition_sched_domains(1, NULL, NULL)\nwill create the default sched domain.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Max Krasnyansky \u003cmaxk@qualcomm.com\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "30e8e13603c247c301fdacabef2a765c84840994", "tree": "753425750bb70f84ae621fa8f0624781557887cb", "parents": [ "3eda20118000941e7e8994fc5fac8706d8c10f00" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Sat Oct 18 20:28:20 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 20 08:52:39 2008 -0700" }, "message": "cpuset: use seq_*mask_* to print masks\n\n1) seq_file excepts that m-\u003ecount \u003d\u003d m-\u003esize when it\u0027s buf is full,\n so current code will causes bugs when buf is overflow.\n\n2) There is not too good that cpuset accesses struct seq_file\u0027s\n fields directly.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nCc: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "40b6a76237563c70466ec7315f644ba87d57dbe5", "tree": "ffadb2b18c77e872acdedd00403655b356121e1d", "parents": [ "52d4b9ac0b985168009c2a57098324e67bae171f" ], "author": { "name": "Rakib Mullick", "email": "rakib.mullick@gmail.com", "time": "Sat Oct 18 20:28:18 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 20 08:52:39 2008 -0700" }, "message": "cpuset.c: remove extra variable\n\nRemove the use of int cpus_nonempty variable from \u0027update_flag\u0027 function.\n\nSigned-off-by: Md.Rakib H. Mullick \u003crakib.mullick@gmail.com\u003e\nAcked-by: Paul Jackson \u003cpj@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d294eb83d8d39a29f01dad391f15fc3a29aa04f9", "tree": "39e8bbcf4f4778e7aa29ef2df66e0b10d1097bbe", "parents": [ "b5ff7df3df9efab511244d5a299fce706c71af48" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Fri Oct 03 12:10:10 2008 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Oct 03 13:39:50 2008 +0200" }, "message": "cpusets: scan_for_empty_cpusets(), cpuset doesn\u0027t seem to be so const\n\nThis fixes a warning on latest -tip:\n\n kernel/cpuset.c: Dans la fonction «scan_for_empty_cpusets» :\n kernel/cpuset.c:1932: attention : passing argument 1 of «list_add_tail» discards qualifiers from pointer target type\n\nActually the struct cpuset *root passed in parameter to scan_for_empty_cpusets\nis not supposed to be const since an entry is added on the tail of its list.\nJust correct the qualifier.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "4e74339af6a59c061cf02f1ac497766bca1de19a", "tree": "0903456d2aced7e2e9534b3b3d1c5f58e1056b53", "parents": [ "dea420ce0e2973e8ef1fd11fde6804c8d03a82ad" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Sat Sep 13 02:33:08 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Sep 13 14:41:50 2008 -0700" }, "message": "cpuset: avoid changing cpuset\u0027s cpus when -errno returned\n\nAfter the patch:\n\ncommit 0b2f630a28d53b5a2082a5275bc3334b10373508\nAuthor: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nDate: Fri Jul 25 01:47:21 2008 -0700\n\n cpusets: restructure the function update_cpumask() and update_nodemask()\n\nIt might happen that \u0027echo 0 \u003e /cpuset/sub/cpus\u0027 returned failure but \u0027cpus\u0027\nhas been changed, because cpus was changed before calling heap_init() which\nmay return -ENOMEM.\n\nThis patch restores the orginal behavior.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Miao Xie \u003cmiaox@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": "cf417141cbb3a4ceb5cca15b2c1f099bd0a6603c", "tree": "958d4539b90d72ba6a7573181ce5ef7153003b4d", "parents": [ "b635acec48bcaa9183fcbf4e3955616b0d4119b5" ], "author": { "name": "Max Krasnyansky", "email": "maxk@qualcomm.com", "time": "Mon Aug 11 14:33:53 2008 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Aug 14 11:23:51 2008 +0200" }, "message": "sched, cpuset: rework sched domains and CPU hotplug handling (v4)\n\nThis is an updated version of my previous cpuset patch on top of\nthe latest mainline git.\nThe patch fixes CPU hotplug handling issues in the current cpusets code.\nNamely circular locking in rebuild_sched_domains() and unsafe access to\nthe cpu_online_map in the cpuset cpu hotplug handler.\n\nThis version includes changes suggested by Paul Jackson (naming, comments,\nstyle, etc). I also got rid of the separate workqueue thread because it is\nnow safe to call get_online_cpus() from workqueue callbacks.\n\nHere are some more details:\n\nrebuild_sched_domains() is the only way to rebuild sched domains\ncorrectly based on the current cpuset settings. What this means\nis that we need to be able to call it from different contexts,\nlike cpu hotplug for example.\nAlso latest scheduler code in -tip now calls rebuild_sched_domains()\ndirectly from functions like arch_reinit_sched_domains().\n\nIn order to support that properly we need to rework cpuset locking\nrules to avoid circular dependencies, which is what this patch does.\nNew lock nesting rules are explained in the comments.\nWe can now safely call rebuild_sched_domains() from virtually any\ncontext. The only requirement is that it needs to be called under\nget_online_cpus(). This allows cpu hotplug handlers and the scheduler\nto call rebuild_sched_domains() directly.\nThe rest of the cpuset code now offloads sched domains rebuilds to\na workqueue (async_rebuild_sched_domains()).\n\nThis version of the patch addresses comments from the previous review.\nI fixed all miss-formated comments and trailing spaces.\n\nI also factored out the code that builds domain masks and split up CPU and\nmemory hotplug handling. This was needed to simplify locking, to avoid unsafe\naccess to the cpu_online_map from mem hotplug handler, and in general to make\nthings cleaner.\n\nThe patch passes moderate testing (building kernel with -j 16, creating \u0026\nremoving domains and bringing cpus off/online at the same time) on the\nquad-core2 based machine.\n\nIt passes lockdep checks, even with preemptable RCU enabled.\nThis time I also tested in with suspend/resume path and everything is working\nas expected.\n\nSigned-off-by: Max Krasnyansky \u003cmaxk@qualcomm.com\u003e\nAcked-by: Paul Jackson \u003cpj@sgi.com\u003e\nCc: menage@google.com\nCc: a.p.zijlstra@chello.nl\nCc: vegard.nossum@gmail.com\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "aeed682421a5ebfbf46940e30c3d1caf3bc64304", "tree": "684412db63c92fdee764a65d174834fbf7ef7a84", "parents": [ "93a6557558a13f9ff35213efeca483f353c39dd3" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Jul 29 22:33:24 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 30 09:41:44 2008 -0700" }, "message": "cpuset: clean up cpuset hierarchy traversal code\n\nUse cpuset.stack_list rather than kfifo, so we avoid memory allocation\nfor kfifo.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Cedric Le Goater \u003cclg@fr.ibm.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "93a6557558a13f9ff35213efeca483f353c39dd3", "tree": "36a426a166f7992a4cc55c0c950a49326868f2d5", "parents": [ "f5393693e96393131a4a2e2743f883986d508503" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Jul 29 22:33:23 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 30 09:41:44 2008 -0700" }, "message": "cpuset: fix wrong calculation of relax domain level\n\nWhen multiple cpusets are overlapping in their \u0027cpus\u0027 and hence they\nform a single sched domain, the largest sched_relax_domain_level among\nthose should be used. But when top_cpuset\u0027s sched_load_balance is\nset, its sched_relax_domain_level is used regardless other sub-cpusets\u0027.\n\nThis patch fixes it by walking the cpuset hierarchy to find the largest\nsched_relax_domain_level.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Cedric Le Goater \u003cclg@fr.ibm.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nReviewed-by: Paul Jackson \u003cpj@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f5393693e96393131a4a2e2743f883986d508503", "tree": "91c6b0687939b9361c8cdcebb05494f1d0524f72", "parents": [ "8d1e6266f512b3a94ef6d33528ff385f1aea0392" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Tue Jul 29 22:33:22 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 30 09:41:44 2008 -0700" }, "message": "cpuset: speed up sched domain partition\n\nAll child cpusets contain a subset of the parent\u0027s cpus, so we can skip\nthem when partitioning sched domains. This decreases \u0027csa\u0027 greately for\ncpusets with multi-level hierarchy.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Cedric Le Goater \u003cclg@fr.ibm.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nReviewed-by: Paul Jackson \u003cpj@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8d1e6266f512b3a94ef6d33528ff385f1aea0392", "tree": "92db3bfbd7bd667a98210a506aadb9db74e15fcd", "parents": [ "4ef1b0fd61333b3b81ebe29283898c6c84b15c9f" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Jul 29 22:33:21 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 30 09:41:44 2008 -0700" }, "message": "cpuset: a bit cleanup for scan_for_empty_cpusets()\n\nclean up hierarchy traversal code\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Cedric Le Goater \u003cclg@fr.ibm.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Cliff Wickman \u003ccpw@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "da5ef6bb96158b0fc0d808704237a453af449124", "tree": "a63113cc3f60c2a6916697bbb06d3c677fa7c121", "parents": [ "02412483777651a26b19a75e49c2a451a174ca9c" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Fri Jul 25 01:47:25 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:38 2008 -0700" }, "message": "cpuset: two minor code-cleanups\n\nIn cpuset_update_task_memory_state() local variable struct task_struct\n*tsk \u003d current;\n\nAnd local variable tsk is used 14 times and statement task_cs(tsk) is used\ntwice in this function. So using task_cs(tsk) instead of task_cs(current)\nis better for readability.\n\nAnd \"(struct cgroup_scanner *)\u0026scan\" is not good for readability also.\n(and \"container_of\" is used in cpuset_do_move_task(), not\n\"(cpuset_hotplug_scanner *)scan\")\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "02412483777651a26b19a75e49c2a451a174ca9c", "tree": "2289c80253b5e6be9b3fe3635e919bbe7a3bd03d", "parents": [ "489a5393a20dcbf91104052120eb2eff8791b61b" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Fri Jul 25 01:47:24 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:38 2008 -0700" }, "message": "cpuset: code-cleanup for started_after\n\ncgroup(cgroup_scan_tasks) will initialize heap-\u003egt for us. This patch\nremoves started_after() and its helper-function.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "489a5393a20dcbf91104052120eb2eff8791b61b", "tree": "63ed72ce1a7a5e4c5d361e8d1c7a876183d8bbf9", "parents": [ "c372e817afc629fea9ff6321313325ed0b4a855b" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Fri Jul 25 01:47:23 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:38 2008 -0700" }, "message": "cpuset: don\u0027t pass empty cpumasks to partition_sched_domains()\n\nI create lots of empty cpusets(empty cpumasks) and turn off the\n\"sched_load_balance\" in top cpuset.\n\nI found that all these empty cpumasks are passed to\npartition_sched_domains() in rebuild_sched_domains(), it\u0027s very\ntime-consuming for partition_sched_domains() and it\u0027s not need.\n\nIt also reduce memory consumed and some works in rebuild_sched_domains()\ntoo.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c372e817afc629fea9ff6321313325ed0b4a855b", "tree": "931188486a41a7923e4eb9b658a272b256b3c048", "parents": [ "f9b4fb8dabf38fb456c97f01aace07cb6e7c1723" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Fri Jul 25 01:47:23 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:38 2008 -0700" }, "message": "cpuset: avoid unnecessary sched domains rebuilding\n\nWhen changing \u0027sched_relax_domain_level\u0027, don\u0027t rebuild sched domains if\n\u0027cpus\u0027 is empty or \u0027sched_load_balance\u0027 is not set.\n\nAlso make the comments of rebuild_sched_domains() more readable.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Hidetoshi Seto \u003cseto.hidetoshi@jp.fujitsu.com\u003e\nCc: Paul Jackson \u003cpj@sgi.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": "f9b4fb8dabf38fb456c97f01aace07cb6e7c1723", "tree": "07fbf909044858d6c50b4098f94c8f084df3924c", "parents": [ "0b2f630a28d53b5a2082a5275bc3334b10373508" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Fri Jul 25 01:47:22 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:38 2008 -0700" }, "message": "cpusets: update task\u0027s cpus_allowed and mems_allowed after CPU/NODE offline/online\n\nThe bug is that a task may run on the cpu/node which is not in its\ncpuset.cpus/ cpuset.mems.\n\nIt can be reproduced by the following commands:\n-----------------------------------\n# mkdir /dev/cpuset\n# mount -t cpuset xxx /dev/cpuset\n# mkdir /dev/cpuset/0\n# echo 0-1 \u003e /dev/cpuset/0/cpus\n# echo 0 \u003e /dev/cpuset/0/mems\n# echo $$ \u003e /dev/cpuset/0/tasks\n# echo 0 \u003e /sys/devices/system/cpu/cpu1/online\n# echo 1 \u003e /sys/devices/system/cpu/cpu1/online\n-----------------------------------\n\nThere is only CPU0 in cpuset.cpus, but the task in this cpuset runs on\nboth CPU0 and CPU1.\n\nIt is because the task\u0027s cpu_allowed didn\u0027t get updated after we did CPU\noffline/online manipulation. Similar for mem_allowed.\n\nThis patch fixes this bug expect for root cpuset. Because there is a\nproblem about root cpuset, in that whether it is necessary to update all\nthe tasks in root cpuset or not after cpu/node offline/online.\n\nIf updating, some kernel threads which is bound into a specified cpu will\nbe unbound.\n\nIf not updating, there is a bug in root cpuset. This bug is also caused\nby offline/online manipulation. For example, there is a dual-cpu machine.\n we create a sub cpuset in root cpuset and assign 1 to its cpus. And then\nwe attach some tasks into this sub cpuset. After this, we offline CPU1.\nNow, the tasks in this new cpuset are moved into root cpuset automatically\nbecause there is no cpu in sub cpuset. Then we online CPU1, we find all\nthe tasks which doesn\u0027t belong to root cpuset originally just run on CPU0.\n\nMaybe we need to add a flag in the task_struct to mark which task can\u0027t be\nunbound?\n\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nAcked-by: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Jackson \u003cpj@sgi.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": "0b2f630a28d53b5a2082a5275bc3334b10373508", "tree": "24f7aa54cedcf941b89f59c964873f3034e76b23", "parents": [ "628f42355389cfb596ca3a5a5f64fb9054a2a06a" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Fri Jul 25 01:47:21 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:37 2008 -0700" }, "message": "cpusets: restructure the function update_cpumask() and update_nodemask()\n\nExtract two functions from update_cpumask() and update_nodemask().They\nwill be used later for updating tasks\u0027 cpus_allowed and mems_allowed after\nCPU/NODE offline/online.\n\n[lizf@cn.fujitsu.com: build fix]\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nAcked-by: Paul Jackson \u003cpj@sgi.com\u003e\nCc: David Rientjes \u003crientjes@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": "e37123953292146445c8629b3950d0513fd10ae2", "tree": "8481ef1898a61cb5438205df349e01c432a1d55b", "parents": [ "af351026aafc8da16518a02b41c66d3e0c1cdef4" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Fri Jul 25 01:47:02 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:36 2008 -0700" }, "message": "cgroup files: remove cpuset_common_file_write()\n\nThis patch tweaks the signatures of the update_cpumask() and\nupdate_nodemask() functions so that they can be called directly as\nhandlers for the new cgroups write_string() method.\n\nThis allows cpuset_common_file_write() to be removed.\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Serge Hallyn \u003cserue@us.ibm.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": "7f9dce38378f0a4a298e885553d6bb7121376376", "tree": "5bfd688c9f356f7216bbc3cef3b4c10153de334b", "parents": [ "26dcce0fabbef75ae426461edf21b5030bad60f3", "ba42059fbd0aa1ac91b582412b5fedb1258f241f" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 23 19:36:53 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 23 19:36:53 2008 -0700" }, "message": "Merge branch \u0027sched/for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027sched/for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n sched: hrtick_enabled() should use cpu_active()\n sched, x86: clean up hrtick implementation\n sched: fix build error, provide partition_sched_domains() unconditionally\n sched: fix warning in inc_rt_tasks() to not declare variable \u0027rq\u0027 if it\u0027s not needed\n cpu hotplug: Make cpu_active_map synchronization dependency clear\n cpu hotplug, sched: Introduce cpu_active_map and redo sched domain managment (take 2)\n sched: rework of \"prioritize non-migratable tasks over migratable ones\"\n sched: reduce stack size in isolated_cpu_setup()\n Revert parts of \"ftrace: do not trace scheduler functions\"\n\nFixed up conflicts in include/asm-x86/thread_info.h (due to the\nTIF_SINGLESTEP unification vs TIF_HRTICK_RESCHED removal) and\nkernel/sched_fair.c (due to cpu_active_map vs for_each_cpu_mask_nr()\nintroduction).\n" }, { "commit": "91cd4d6ef0abb1f65e81f8fe37e7d3c10344e38c", "tree": "48aa8cfd245839381d5b16ff8065abc96031a6c5", "parents": [ "1673ad52bd9a3c747e596a76e65c55981ea651e3" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Mon Jul 21 14:21:35 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jul 22 09:59:41 2008 -0700" }, "message": "cpusets: fix wrong domain attr updates\n\nFix wrong domain attr updates, or we will always update the first sched\ndomain attr.\n\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nCc: Hidetoshi Seto \u003cseto.hidetoshi@jp.fujitsu.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: \u003cstable@kernel.org\u003e\t[2.6.26.x]\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e761b7725234276a802322549cee5255305a0930", "tree": "27b351a7d5fc9a93590e0effce1c5adb1bfcebc0", "parents": [ "7ebefa8ceefed44cc321be70afc54a585a68ac0b" ], "author": { "name": "Max Krasnyansky", "email": "maxk@qualcomm.com", "time": "Tue Jul 15 04:43:49 2008 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jul 18 13:22:25 2008 +0200" }, "message": "cpu hotplug, sched: Introduce cpu_active_map and redo sched domain managment (take 2)\n\nThis is based on Linus\u0027 idea of creating cpu_active_map that prevents\nscheduler load balancer from migrating tasks to the cpu that is going\ndown.\n\nIt allows us to simplify domain management code and avoid unecessary\ndomain rebuilds during cpu hotplug event handling.\n\nPlease ignore the cpusets part for now. It needs some more work in order\nto avoid crazy lock nesting. Although I did simplfy and unify domain\nreinitialization logic. We now simply call partition_sched_domains() in\nall the cases. This means that we\u0027re using exact same code paths as in\ncpusets case and hence the test below cover cpusets too.\nCpuset changes to make rebuild_sched_domains() callable from various\ncontexts are in the separate patch (right next after this one).\n\nThis not only boots but also easily handles\n\twhile true; do make clean; make -j 8; done\nand\n\twhile true; do on-off-cpu 1; done\nat the same time.\n(on-off-cpu 1 simple does echo 0/1 \u003e /sys/.../cpu1/online thing).\n\nSuprisingly the box (dual-core Core2) is quite usable. In fact I\u0027m typing\nthis on right now in gnome-terminal and things are moving just fine.\n\nAlso this is running with most of the debug features enabled (lockdep,\nmutex, etc) no BUG_ONs or lockdep complaints so far.\n\nI believe I addressed all of the Dmitry\u0027s comments for original Linus\u0027\nversion. I changed both fair and rt balancer to mask out non-active cpus.\nAnd replaced cpu_is_offline() with !cpu_active() in the main scheduler\ncode where it made sense (to me).\n\nSigned-off-by: Max Krasnyanskiy \u003cmaxk@qualcomm.com\u003e\nAcked-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nAcked-by: Gregory Haskins \u003cghaskins@novell.com\u003e\nCc: dmitry.adamushko@gmail.com\nCc: pj@sgi.com\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "873a6ed6288b6c2c0d2cc84d3b2bf2fab9ba0181", "tree": "e0749eee70ce3ca29d62bb3b67248c87a97ec2b7", "parents": [ "361833efac4d277d209008e1e0658e597bc1bdef", "bce7f793daec3e65ec5c5705d2457b81fe7b5725" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jul 14 12:19:19 2008 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jul 14 12:19:19 2008 +0200" }, "message": "Merge commit \u0027v2.6.26\u0027 into sched/devel\n" }, { "commit": "3e84050c81ffb4961ef43d20e1fb1d7607167d83", "tree": "62ae82ba6cc923222ab0053efcb8b2dec9b91ca0", "parents": [ "b1e387348a2a70954312b102d0589c3e2ca3dba1" ], "author": { "name": "Dmitry Adamushko", "email": "dmitry.adamushko@gmail.com", "time": "Sun Jul 13 02:10:29 2008 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Jul 13 11:37:02 2008 +0200" }, "message": "cpusets, hotplug, scheduler: fix scheduler domain breakage\n\nCommit f18f982ab (\"sched: CPU hotplug events must not destroy scheduler\ndomains created by the cpusets\") introduced a hotplug-related problem as\ndescribed below:\n\nUpon CPU_DOWN_PREPARE,\n\n update_sched_domains() -\u003e detach_destroy_domains(\u0026cpu_online_map)\n\ndoes the following:\n\n/*\n * Force a reinitialization of the sched domains hierarchy. The domains\n * and groups cannot be updated in place without racing with the balancing\n * code, so we temporarily attach all running cpus to the NULL domain\n * which will prevent rebalancing while the sched domains are recalculated.\n */\n\nThe sched-domains should be rebuilt when a CPU_DOWN ops. has been\ncompleted, effectively either upon CPU_DEAD{_FROZEN} (upon success) or\nCPU_DOWN_FAILED{_FROZEN} (upon failure -- restore the things to their\ninitial state). That\u0027s what update_sched_domains() also does but only\nfor !CPUSETS case.\n\nWith f18f982ab, sched-domains\u0027 reinitialization is delegated to\nCPUSETS code:\n\ncpuset_handle_cpuhp() -\u003e common_cpu_mem_hotplug_unplug() -\u003e\nrebuild_sched_domains()\n\nBeing called for CPU_UP_PREPARE and if its callback is called after\nupdate_sched_domains()), it just negates all the work done by\nupdate_sched_domains() -- i.e. a soon-to-be-offline cpu is included in\nthe sched-domains and that makes it visible for the load-balancer\nwhile the CPU_DOWN ops. is in progress.\n\n__migrate_live_tasks() moves the tasks off a \u0027dead\u0027 cpu (it\u0027s already\n\"offline\" when this function is called).\n\ntry_to_wake_up() is called for one of these tasks from another CPU -\u003e\nthe load-balancer (wake_idle()) picks up a \"dead\" CPU and places the\ntask on it. Then e.g. BUG_ON(rq-\u003enr_running) detects this a bit later\n-\u003e oops.\n\nSigned-off-by: Dmitry Adamushko \u003cdmitry.adamushko@gmail.com\u003e\nTested-by: Vegard Nossum \u003cvegard.nossum@gmail.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Max Krasnyansky \u003cmaxk@qualcomm.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: miaox@cn.fujitsu.com\nCc: rostedt@goodmis.org\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "1de8644cc7c826e0c41e52825bd5a12e2e31e6ca", "tree": "df1e884080599facaf70d2675c480e999da953e1", "parents": [ "6c3df25511c2c51f2dd36cc52a8d22363d731793", "481c5346d0981940ee63037eb53e4e37b0735c10" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jun 23 11:30:23 2008 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jun 23 11:30:23 2008 +0200" }, "message": "Merge branch \u0027linus\u0027 into sched/devel\n" }, { "commit": "1f1e2ce8a55bac60ff165d353c6b882e750c9092", "tree": "b11aaa5baa04ea5ea0ecc549fa1c95430919cd82", "parents": [ "e570dc2a503f8334b700e8483082c675394f53fd", "9c106c119ebedf624fbd682fd2a4d52e3c8c1a67" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jun 20 12:37:13 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jun 20 12:37:13 2008 -0700" }, "message": "Merge branch \u0027core-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027core-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n softlockup: fix NMI hangs due to lock race - 2.6.26-rc regression\n rcupreempt: remove export of rcu_batches_completed_bh\n cpuset: limit the input of cpuset.sched_relax_domain_level\n" }, { "commit": "30e0e178193d4221abc9926b07a4c7661c7cc4a9", "tree": "f6ad7d54e810a97345ad82b55832a2dbfb3ca6e2", "parents": [ "9bedbcb207ed9a571b239231d99c8fd4a34ae24d" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue May 13 10:27:17 2008 +0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Jun 19 09:45:36 2008 +0200" }, "message": "cpuset: limit the input of cpuset.sched_relax_domain_level\n\nWe allow the inputs to be [-1 ... SD_LV_MAX), and return -EINVAL\nfor inputs outside this range.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: Paul Jackson \u003cpj@sgi.com\u003e\nAcked-by: Hidetoshi Seto \u003cseto.hidetoshi@jp.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "f18f982abf183e91f435990d337164c7a43d1e6d", "tree": "d80f6b09825db1c5103d7b8518189613c9b57fbe", "parents": [ "15a8641eadb492ef7c5489faa25256967bdfd303" ], "author": { "name": "Max Krasnyansky", "email": "maxk@qualcomm.com", "time": "Thu May 29 11:17:01 2008 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Jun 19 09:14:51 2008 +0200" }, "message": "sched: CPU hotplug events must not destroy scheduler domains created by the cpusets\n\nFirst issue is not related to the cpusets. We\u0027re simply leaking doms_cur.\nIt\u0027s allocated in arch_init_sched_domains() which is called for every\nhotplug event. So we just keep reallocation doms_cur without freeing it.\nI introduced free_sched_domains() function that cleans things up.\n\nSecond issue is that sched domains created by the cpusets are\ncompletely destroyed by the CPU hotplug events. For all CPU hotplug\nevents scheduler attaches all CPUs to the NULL domain and then puts\nthem all into the single domain thereby destroying domains created\nby the cpusets (partition_sched_domains).\nThe solution is simple, when cpusets are enabled scheduler should not\ncreate default domain and instead let cpusets do that. Which is\nexactly what the patch does.\n\nSigned-off-by: Max Krasnyansky \u003cmaxk@qualcomm.com\u003e\nCc: pj@sgi.com\nCc: menage@google.com\nCc: rostedt@goodmis.org\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "f9e8e07e074a880e110922759dcdb369fecdf07c", "tree": "61bc9a61e0a0546a81d699047d9e001c50b52d50", "parents": [ "e9886ca3a93d7d041d3de8e5acebe213da777d59", "066519068ad2fbe98c7f45552b1f592903a9c8c8" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jun 16 11:15:21 2008 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jun 16 11:15:21 2008 +0200" }, "message": "Merge branch \u0027linus\u0027 into sched-devel\n" }, { "commit": "9985b0bab332289f14837eff3c6e0bcc658b58f7", "tree": "8c4bcbc4348c473b14644dc4d371a45c0dabda53", "parents": [ "7def2be1dc679984f4c4fb3ef19a8a081b2454ec" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Thu Jun 05 12:57:11 2008 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Jun 10 12:26:16 2008 +0200" }, "message": "sched: prevent bound kthreads from changing cpus_allowed\n\nKthreads that have called kthread_bind() are bound to specific cpus, so\nother tasks should not be able to change their cpus_allowed from under\nthem. Otherwise, it is possible to move kthreads, such as the migration\nor software watchdog threads, so they are not allowed access to the cpu\nthey work on.\n\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "37340746a66e5e7feed5945f28cb75d90a8fd9f6", "tree": "b056132aad9eab38886b7359797302cbeeabc3fa", "parents": [ "aae8679b0ebcaa92f99c1c3cb0cd651594a43915" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Thu Jun 05 22:46:32 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jun 06 11:29:11 2008 -0700" }, "message": "cpusets: fix bug when adding nonexistent cpu or mem\n\nAdding a nonexistent cpu to a cpuset will be omitted quietly. It should\nreturn -EINVAL.\n\nExample: (real_nr_cpus \u003c\u003d 4 \u003c NR_CPUS or cpu#4 was just offline)\n\n# cat cpus\n0-1\n# /bin/echo 4 \u003e cpus\n# /bin/echo $?\n0\n# cat cpus\n\n#\n\nThe same occurs when add a nonexistent mem.\nThis patch will fix this bug.\nAnd when *buf \u003d\u003d \"\", the check is unneeded.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nAcked-by: Paul Jackson \u003cpj@sgi.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": "5c8e1ed1d204a6770ca2854cd3b3597070fe7e5a", "tree": "72a2bb4394d1f0b8492ea9566990a39ca597b840", "parents": [ "1100ac91b6af02d8639d518fad5b434b1bf44ed6" ], "author": { "name": "Max Krasnyansky", "email": "maxk@qualcomm.com", "time": "Thu May 29 11:17:01 2008 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jun 06 15:25:00 2008 +0200" }, "message": "sched: CPU hotplug events must not destroy scheduler domains created by the cpusets\n\nFirst issue is not related to the cpusets. We\u0027re simply leaking doms_cur.\nIt\u0027s allocated in arch_init_sched_domains() which is called for every\nhotplug event. So we just keep reallocation doms_cur without freeing it.\nI introduced free_sched_domains() function that cleans things up.\n\nSecond issue is that sched domains created by the cpusets are\ncompletely destroyed by the CPU hotplug events. For all CPU hotplug\nevents scheduler attaches all CPUs to the NULL domain and then puts\nthem all into the single domain thereby destroying domains created\nby the cpusets (partition_sched_domains).\nThe solution is simple, when cpusets are enabled scheduler should not\ncreate default domain and instead let cpusets do that. Which is\nexactly what the patch does.\n\nSigned-off-by: Max Krasnyansky \u003cmaxk@qualcomm.com\u003e\nCc: pj@sgi.com\nCc: menage@google.com\nCc: rostedt@goodmis.org\nCc: mingo@elte.hu\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "5be7a4792a31df6f2cd44bfba8da467ea20a0642", "tree": "87ec7f4f59f52a729ab21aa6d6bf3d3e6cad9474", "parents": [ "4ea33e2dc2dab10960877e1649ee527c033f42c0" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Tue May 06 20:42:41 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 08 10:46:56 2008 -0700" }, "message": "Fix cpuset sched_relax_domain_level control file\n\nDue to a merge conflict, the sched_relax_domain_level control file was marked\nas being handled by cpuset_read/write_u64, but the code to handle it was\nactually in cpuset_common_file_read/write.\n\nSince the value being written/read is in fact a signed integer, it should be\ntreated as such; this patch adds cpuset_read/write_s64 functions, and uses\nthem to handle the sched_relax_domain_level file.\n\nWith this patch, the sched_relax_domain_level can be read and written, and the\ncorrect contents seen/updated.\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Hidetoshi Seto \u003cseto.hidetoshi@jp.fujitsu.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nReviewed-by: 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": "786083667e0ced85ce17c4c0b6c57a9f47c5b9f2", "tree": "4519c51c3ec7d093fe0bafbbd67204a6f7b773b3", "parents": [ "addf2c739d9015d3e9c0500b58a3af051cd58ea7" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Tue Apr 29 01:00:26 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:11 2008 -0700" }, "message": "Cpuset hardwall flag: add a mem_hardwall flag to cpusets\n\nThis flag provides the hardwalling properties of mem_exclusive, without\nenforcing the exclusivity. Either mem_hardwall or mem_exclusive is sufficient\nto prevent GFP_KERNEL allocations from passing outside the cpuset\u0027s assigned\nnodes.\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: Paul Jackson \u003cpj@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "addf2c739d9015d3e9c0500b58a3af051cd58ea7", "tree": "0dec81fe642817c32c8c6b3a77dc72fb41c1a145", "parents": [ "9e0c914cabc6d75d2eafdff00671a2ad683a5e3c" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Tue Apr 29 01:00:26 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:11 2008 -0700" }, "message": "Cpuset hardwall flag: switch cpusets to use the bulk cgroup_add_files() API\n\nCurrently the cpusets mem_exclusive flag is overloaded to mean both\n\"no-overlapping\" and \"no GFP_KERNEL allocations outside this cpuset\".\n\nThese patches add a new mem_hardwall flag with just the allocation restriction\npart of the mem_exclusive semantics, without breaking backwards-compatibility\nfor those who continue to use just mem_exclusive. Additionally, the cgroup\ncontrol file registration for cpusets is cleaned up to reduce boilerplate.\n\nThis patch:\n\nThis change tidies up the cpusets control file definitions, and reduces the\namount of boilerplate required to add/change control files in the future.\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nReviewed-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Paul Jackson \u003cpj@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9e0c914cabc6d75d2eafdff00671a2ad683a5e3c", "tree": "5986ff43c7af515b34520069efce556b529ea5d9", "parents": [ "1faf8e40a8ab12ae1f7f474965e6fb031e43f8d6" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Tue Apr 29 01:00:25 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:11 2008 -0700" }, "message": "kernel/cpuset.c: make 3 functions static\n\nMake the following needlessly global functions static:\n\n- cpuset_test_cpumask()\n- cpuset_change_cpumask()\n- cpuset_do_move_task()\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nAcked-by: Paul Jackson \u003cpj@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "700fe1ab99240c1a9c4d155e2a0612a1b044bb69", "tree": "0a3f15dc24d3f369ed16b06625a1620b997c38ab", "parents": [ "b7269dfc826fbf554c9e6a9eaa4e6ff95fa08656" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Tue Apr 29 01:00:00 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:08 2008 -0700" }, "message": "CGroup API files: update cpusets to use cgroup structured file API\n\nMany of the cpusets control files are simple integer values, which don\u0027t\nrequire the overhead of memory allocations for reads and writes.\n\nMove the handlers for these control files into cpuset_read_u64() and\ncpuset_write_u64().\n\n[akpm@linux-foundation.org: ad dmissing `break\u0027]\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nCc: \"Li Zefan\" \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: \"YAMAMOTO Takashi\" \u003cyamamoto@valinux.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": "b331d259b1147f82d692f3b866e036017cbde8fe", "tree": "db8de3a81e63c97c778b950dc6221458df6e6988", "parents": [ "d613c3e2d841889f32b1e74f251a6a6bcd9642cf" ], "author": { "name": "Harvey Harrison", "email": "harvey.harrison@gmail.com", "time": "Mon Apr 28 14:13:19 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 17:29:18 2008 -0700" }, "message": "kernel: fix integer as NULL pointer warnings\n\nkernel/cpuset.c:1268:52: warning: Using plain integer as NULL pointer\nkernel/pid_namespace.c:95:24: warning: Using plain integer as NULL pointer\n\nSigned-off-by: Harvey Harrison \u003charvey.harrison@gmail.com\u003e\nReviewed-by: Paul Jackson \u003cpj@sgi.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "846a16bf0fc80dc95a414ffce465e3cbf9680247", "tree": "45e03061c5e3d8242bf470509771926f37177415", "parents": [ "f0be3d32b05d3fea2fcdbbb81a39dac2a7163169" ], "author": { "name": "Lee Schermerhorn", "email": "lee.schermerhorn@hp.com", "time": "Mon Apr 28 02:13:09 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:23 2008 -0700" }, "message": "mempolicy: rename mpol_copy to mpol_dup\n\nThis patch renames mpol_copy() to mpol_dup() because, well, that\u0027s what it\ndoes. Like, e.g., strdup() for strings, mpol_dup() takes a pointer to an\nexisting mempolicy, allocates a new one and copies the contents.\n\nIn a later patch, I want to use the name mpol_copy() to copy the contents from\none mempolicy to another like, e.g., strcpy() does for strings.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "19770b32609b6bf97a3dece2529089494cbfc549", "tree": "3b5922d1b20aabdf929bde9309f323841717747a", "parents": [ "dd1a239f6f2d4d3eedd318583ec319aa145b324c" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Mon Apr 28 02:12:18 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:19 2008 -0700" }, "message": "mm: filter based on a nodemask as well as a gfp_mask\n\nThe MPOL_BIND policy creates a zonelist that is used for allocations\ncontrolled by that mempolicy. As the per-node zonelist is already being\nfiltered based on a zone id, this patch adds a version of __alloc_pages() that\ntakes a nodemask for further filtering. This eliminates the need for\nMPOL_BIND to create a custom zonelist.\n\nA positive benefit of this is that allocations using MPOL_BIND now use the\nlocal node\u0027s distance-ordered zonelist instead of a custom node-id-ordered\nzonelist. I.e., pages will be allocated from the closest allowed node with\navailable memory.\n\n[Lee.Schermerhorn@hp.com: Mempolicy: update stale documentation and comments]\n[Lee.Schermerhorn@hp.com: Mempolicy: make dequeue_huge_page_vma() obey MPOL_BIND nodemask]\n[Lee.Schermerhorn@hp.com: Mempolicy: make dequeue_huge_page_vma() obey MPOL_BIND nodemask rework]\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: 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": "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" } ], "next": "1d3504fcf5606579d60b649d19f44b3871c1ddae" }