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Tetsuo Handa d7a94e7e11 oom: don't count on mm-less current process 
out_of_memory() doesn't trigger the OOM killer if the current task is
already exiting or it has fatal signals pending, and gives the task
access to memory reserves instead.  However, doing so is wrong if
out_of_memory() is called by an allocation (e.g. from exit_task_work())
after the current task has already released its memory and cleared
TIF_MEMDIE at exit_mm().  If we again set TIF_MEMDIE to post-exit_mm()
current task, the OOM killer will be blocked by the task sitting in the
final schedule() waiting for its parent to reap it.  It will trigger an
OOM livelock if its parent is unable to reap it due to doing an
allocation and waiting for the OOM killer to kill it.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-11 17:06:00 -08:00
..
backing-dev.c
Merge branch 'for-3.18/core' of git://git.kernel.dk/linux-block
2014-10-18 11:53:51 -07:00
balloon_compaction.c
mm/balloon_compaction: fix deflation when compaction is disabled
2014-10-29 16:33:15 -07:00
bootmem.c
mem-hotplug: reset node managed pages when hot-adding a new pgdat
2014-11-13 16:17:06 -08:00
cleancache.c
mm: fix cleancache debugfs directory path
2015-01-20 14:08:31 +01:00
cma.c
mm: cma: split cma-reserved in dmesg log
2014-12-18 19:08:10 -08:00
compaction.c
mm, compaction: more focused lru and pcplists draining
2014-12-10 17:41:06 -08:00
debug-pagealloc.c
mm/debug-pagealloc: make debug-pagealloc boottime configurable
2014-12-13 12:42:48 -08:00
debug.c
mm: remove rest usage of VM_NONLINEAR and pte_file()
2015-02-10 14:30:31 -08:00
dmapool.c
mm/dmapool.c: fixed a brace coding style issue
2014-10-09 22:26:00 -04:00
early_ioremap.c
mm: create generic early_ioremap() support
2014-04-07 16:36:15 -07:00
fadvise.c
mm: fadvise: document the fadvise(FADV_DONTNEED) behaviour for partial pages
2014-12-13 12:42:49 -08:00
failslab.c
…
filemap_xip.c
mm: drop vm_ops->remap_pages and generic_file_remap_pages() stub
2015-02-10 14:30:30 -08:00
filemap.c
mm: drop vm_ops->remap_pages and generic_file_remap_pages() stub
2015-02-10 14:30:30 -08:00
frontswap.c
mm/frontswap.c: fix the condition in BUG_ON
2014-12-10 17:41:08 -08:00
gup.c
mm: remove rest usage of VM_NONLINEAR and pte_file()
2015-02-10 14:30:31 -08:00
highmem.c
mm/highmem: make kmap cache coloring aware
2014-08-06 18:01:22 -07:00
huge_memory.c
mm:add KPF_ZERO_PAGE flag for /proc/kpageflags
2015-02-11 17:06:00 -08:00
hugetlb_cgroup.c
mm: hugetlb_cgroup: convert to lockless page counters
2014-12-10 17:41:04 -08:00
hugetlb.c
mm: hugetlb: fix type of hugetlb_treat_as_movable variable
2015-02-10 14:30:34 -08:00
hwpoison-inject.c
mm/hwpoison-inject.c: remove unnecessary null test before debugfs_remove_recursive
2014-08-06 18:01:19 -07:00
init-mm.c
…
internal.h
mm, compaction: always update cached scanner positions
2014-12-10 17:41:06 -08:00
interval_tree.c
mm: replace vma->sharead.linear with vma->shared
2015-02-10 14:30:31 -08:00
iov_iter.c
copy_from_iter_nocache()
2014-12-08 20:25:23 -05:00
Kconfig
rcu: Make SRCU optional by using CONFIG_SRCU
2015-01-06 11:04:29 -08:00
Kconfig.debug
mm/debug_pagealloc: remove obsolete Kconfig options
2015-01-08 15:10:52 -08:00
kmemcheck.c
mm/slab_common: move kmem_cache definition to internal header
2014-10-09 22:25:50 -04:00
kmemleak-test.c
mm/kmemleak-test.c: use pr_fmt for logging
2014-06-06 16:08:18 -07:00
kmemleak.c
mm: introduce kmemleak_update_trace()
2014-06-06 16:08:17 -07:00
ksm.c
mm: remove rest usage of VM_NONLINEAR and pte_file()
2015-02-10 14:30:31 -08:00
list_lru.c
mm: keep page cache radix tree nodes in check
2014-04-03 16:21:01 -07:00
maccess.c
…
madvise.c
mm: remove rest usage of VM_NONLINEAR and pte_file()
2015-02-10 14:30:31 -08:00
Makefile
mm: replace remap_file_pages() syscall with emulation
2015-02-10 14:30:30 -08:00
memblock.c
mm/memblock.c: refactor functions to set/clear MEMBLOCK_HOTPLUG
2014-12-13 12:42:46 -08:00
memcontrol.c
memcg: zap memcg_slab_caches and memcg_slab_mutex
2015-02-10 14:30:34 -08:00
memory_hotplug.c
mm, memory_hotplug/failure: drain single zone pcplists
2014-12-10 17:41:05 -08:00
memory-failure.c
mm: vmscan: invoke slab shrinkers from shrink_zone()
2014-12-13 12:42:48 -08:00
memory.c
Merge branch 'akpm' (patches from Andrew)
2015-02-10 16:45:56 -08:00
mempolicy.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-12-19 18:19:19 -08:00
mempool.c
mm/mempool.c: update the kmemleak stack trace for mempool allocations
2014-06-06 16:08:17 -07:00
migrate.c
rmap: drop support of non-linear mappings
2015-02-10 14:30:31 -08:00
mincore.c
mm: remove rest usage of VM_NONLINEAR and pte_file()
2015-02-10 14:30:31 -08:00
mlock.c
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-10-13 15:44:12 +02:00
mm_init.c
mm: bring back /sys/kernel/mm
2014-01-27 21:02:39 -08:00
mmap.c
rmap: drop support of non-linear mappings
2015-02-10 14:30:31 -08:00
mmu_context.c
sched/mm: call finish_arch_post_lock_switch in idle_task_exit and use_mm
2014-02-21 08:50:17 +01:00
mmu_notifier.c
mmu_notifier: add the callback for mmu_notifier_invalidate_range()
2014-11-13 13:46:09 +11:00
mmzone.c
mm: numa: Change page last {nid,pid} into {cpu,pid}
2013-10-09 14:47:45 +02:00
mprotect.c
mm: remove rest usage of VM_NONLINEAR and pte_file()
2015-02-10 14:30:31 -08:00
mremap.c
mm: remove rest usage of VM_NONLINEAR and pte_file()
2015-02-10 14:30:31 -08:00
msync.c
mm: remove rest usage of VM_NONLINEAR and pte_file()
2015-02-10 14:30:31 -08:00
nobootmem.c
mem-hotplug: reset node managed pages when hot-adding a new pgdat
2014-11-13 16:17:06 -08:00
nommu.c
mm: replace remap_file_pages() syscall with emulation
2015-02-10 14:30:30 -08:00
oom_kill.c
oom: don't count on mm-less current process
2015-02-11 17:06:00 -08:00
page_alloc.c
mm/page_alloc.c: place zone_id check before VM_BUG_ON_PAGE check
2015-02-10 14:30:34 -08:00
page_counter.c
mm: memcontrol: remove obsolete kmemcg pinning tricks
2014-12-10 17:41:05 -08:00
page_ext.c
mm/page_owner: keep track of page owners
2014-12-13 12:42:48 -08:00
page_io.c
fix __swap_writepage() compile failure on old gcc versions
2014-06-14 19:30:48 -05:00
page_isolation.c
mm, page_isolation: drain single zone pcplists
2014-12-10 17:41:05 -08:00
page_owner.c
mm/page_owner: correct owner information for early allocated pages
2014-12-13 12:42:48 -08:00
page-writeback.c
mm: protect set_page_dirty() from ongoing truncation
2015-01-08 15:10:51 -08:00
pagewalk.c
mm: pagewalk: call pte_hole() for VM_PFNMAP during walk_page_range
2015-02-05 13:35:29 -08:00
percpu-km.c
percpu: implmeent pcpu_nr_empty_pop_pages and chunk->nr_populated
2014-09-02 14:46:05 -04:00
percpu-vm.c
percpu: move region iterations out of pcpu_[de]populate_chunk()
2014-09-02 14:46:02 -04:00
percpu.c
percpu: off by one in BUG_ON()
2014-10-29 10:34:34 -04:00
pgtable-generic.c
mm: actually clear pmd_numa before invalidating
2014-08-29 16:28:15 -07:00
process_vm_access.c
start adding the tag to iov_iter
2014-05-06 17:32:49 -04:00
quicklist.c
…
readahead.c
mm/readahead.c: remove unused file_ra_state from count_history_pages
2014-08-06 18:01:15 -07:00
rmap.c
rmap: drop support of non-linear mappings
2015-02-10 14:30:31 -08:00
shmem.c
mm: drop vm_ops->remap_pages and generic_file_remap_pages() stub
2015-02-10 14:30:30 -08:00
slab_common.c
memcg: zap memcg_slab_caches and memcg_slab_mutex
2015-02-10 14:30:34 -08:00
slab.c
slab: fix cpuset check in fallback_alloc
2014-12-13 12:42:53 -08:00
slab.h
memcg: zap __memcg_{charge,uncharge}_slab
2015-02-10 14:30:34 -08:00
slob.c
mm/sl[ao]b: always track caller in kmalloc_(node_)track_caller()
2014-10-09 22:25:50 -04:00
slub.c
mm/slub.c: fix typo in comment
2015-02-10 14:30:30 -08:00
sparse-vmemmap.c
mm/sparse: use memblock apis for early memory allocations
2014-01-21 16:19:47 -08:00
sparse.c
mm: use macros from compiler.h instead of __attribute__((...))
2014-04-07 16:35:54 -07:00
swap_cgroup.c
mm: page_cgroup: rename file to mm/swap_cgroup.c
2014-12-10 17:41:09 -08:00
swap_state.c
mm: page_cgroup: rename file to mm/swap_cgroup.c
2014-12-10 17:41:09 -08:00
swap.c
rmap: drop support of non-linear mappings
2015-02-10 14:30:31 -08:00
swapfile.c
mm: page_cgroup: rename file to mm/swap_cgroup.c
2014-12-10 17:41:09 -08:00
truncate.c
mm: Fix comment before truncate_setsize()
2014-11-07 08:29:25 +11:00
util.c
proc/maps: make vm_is_stack() logic namespace-friendly
2014-10-09 22:25:50 -04:00
vmacache.c
mm,vmacache: count number of system-wide flushes
2014-12-13 12:42:48 -08:00
vmalloc.c
mm/vmalloc.c: fix memory ordering bug
2014-12-13 12:42:49 -08:00
vmpressure.c
mm/vmpressure.c: fix race in vmpressure_work_fn()
2014-12-02 17:32:07 -08:00
vmscan.c
mm/vmscan: fix highidx argument type
2015-01-26 13:37:18 -08:00
vmstat.c
mm/vmstat.c: fix/cleanup ifdefs
2015-02-10 14:30:30 -08:00
workingset.c
mm: keep page cache radix tree nodes in check
2014-04-03 16:21:01 -07:00
zbud.c
mm/zbud: init user ops only when it is needed
2014-12-13 12:42:51 -08:00
zpool.c
mm/zpool: use prefixed module loading
2014-08-29 16:28:16 -07:00
zsmalloc.c
mm/zsmalloc: adjust order of functions
2014-12-18 19:08:11 -08:00
zswap.c
mm/zswap: delete unnecessary check before calling free_percpu()
2014-12-13 12:42:50 -08:00