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linux-2.6/mm
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Oleg Nesterov c027a474a6 oom: task->mm == NULL doesn't mean the memory was freed 
exit_mm() sets ->mm == NULL then it does mmput()->exit_mmap() which
frees the memory.

However select_bad_process() checks ->mm != NULL before TIF_MEMDIE,
so it continues to kill other tasks even if we have the oom-killed
task freeing its memory.

Change select_bad_process() to check ->mm after TIF_MEMDIE, but skip
the tasks which have already passed exit_notify() to ensure a zombie
with TIF_MEMDIE set can't block oom-killer. Alternatively we could
probably clear TIF_MEMDIE after exit_mmap().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2011-08-01 15:24:12 -10:00
..
Kconfig mm Kconfig typo: cleancacne -> cleancache 2011-06-10 14:47:52 +02:00
Kconfig.debug
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Makefile mm: cleancache core ops functions and config 2011-05-26 10:01:36 -06:00
backing-dev.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback 2011-07-26 10:39:54 -07:00
bootmem.c
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bounce.c
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cleancache.c mm: cleancache core ops functions and config 2011-05-26 10:01:36 -06:00
compaction.c mm: compaction: abort compaction if too many pages are isolated and caller is asynchronous V2 2011-06-15 20:04:02 -07:00
debug-pagealloc.c
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dmapool.c devres: fix possible use after free 2011-07-25 20:57:14 -07:00
fadvise.c
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failslab.c failslab: simplify debugfs initialization 2011-07-26 16:49:46 -07:00
filemap.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback 2011-07-26 10:39:54 -07:00
filemap_xip.c
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fremap.c mm: don't access vm_flags as 'int' 2011-05-26 09:20:31 -07:00
highmem.c
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huge_memory.c mm/huge_memory.c: minor lock simplification in __khugepaged_exit 2011-07-25 20:57:09 -07:00
hugetlb.c mm: hugetlb: fix coding style issues 2011-07-25 20:57:09 -07:00
hwpoison-inject.c
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init-mm.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
internal.h
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kmemcheck.c
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kmemleak-test.c
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kmemleak.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
ksm.c ksm: fix NULL pointer dereference in scan_get_next_rmap_item() 2011-06-15 20:04:02 -07:00
maccess.c maccess,probe_kernel: Make write/read src const void * 2011-05-25 19:56:23 -04:00
madvise.c fs: kill i_alloc_sem 2011-07-20 20:47:46 -04:00
memblock.c mm/memblock.c: avoid abuse of RED_INACTIVE 2011-07-25 20:57:09 -07:00
memcontrol.c memcg: get rid of percpu_charge_mutex lock 2011-07-26 16:49:43 -07:00
memory-failure.c mm/memory-failure.c: fix spinlock vs mutex order 2011-06-27 18:00:13 -07:00
memory.c mm/futex: fix futex writes on archs with SW tracking of dirty & young 2011-07-25 20:57:11 -07:00
memory_hotplug.c mm: extend memory hotplug API to allow memory hotplug in virtual machines 2011-07-25 20:57:08 -07:00
mempolicy.c cpusets: randomize node rotor used in cpuset_mem_spread_node() 2011-07-26 16:49:43 -07:00
mempool.c
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migrate.c migrate: don't account swapcache as shmem 2011-06-16 15:01:24 -07:00
mincore.c
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mlock.c mm: don't access vm_flags as 'int' 2011-05-26 09:20:31 -07:00
mm_init.c
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mmap.c mmap: fix and tidy up overcommit page arithmetic 2011-07-25 20:57:09 -07:00
mmu_context.c
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mmu_notifier.c
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mmzone.c
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mprotect.c
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mremap.c
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msync.c
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nobootmem.c memblock/nobootmem: remove unneeded code from alloc_bootmem_node_high() 2011-05-25 08:39:31 -07:00
nommu.c mmap: fix and tidy up overcommit page arithmetic 2011-07-25 20:57:09 -07:00
oom_kill.c oom: task->mm == NULL doesn't mean the memory was freed 2011-08-01 15:24:12 -10:00
page-writeback.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback 2011-07-26 10:39:54 -07:00
page_alloc.c fail_page_alloc: simplify debugfs initialization 2011-07-26 16:49:46 -07:00
page_cgroup.c mm/page_cgroup.c: simplify code by using SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macros 2011-07-25 20:57:09 -07:00
page_io.c
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page_isolation.c
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pagewalk.c pagewalk: fix code comment for THP 2011-07-25 20:57:09 -07:00
percpu-km.c
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percpu-vm.c
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percpu.c
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pgtable-generic.c
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prio_tree.c
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quicklist.c
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readahead.c readahead: readahead page allocations are OK to fail 2011-05-25 08:39:25 -07:00
rmap.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback 2011-07-26 10:39:54 -07:00
shmem.c Merge 'akpm' patch series 2011-07-25 21:00:19 -07:00
slab.c slab: use NUMA_NO_NODE 2011-07-31 18:14:21 +03:00
slob.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
slub.c Merge branch 'slub/lockless' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6 2011-07-30 08:21:48 -10:00
sparse-vmemmap.c
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sparse.c mm: make some struct page's const 2011-07-25 20:57:07 -07:00
swap.c mm: batch activate_page() to reduce lock contention 2011-05-25 08:39:37 -07:00
swap_state.c
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swapfile.c fs: seq_file - add event counter to simplify poll() support 2011-07-20 20:47:50 -04:00
thrash.c mm: swap-token: add a comment for priority aging 2011-07-25 20:57:08 -07:00
truncate.c mm: pincer in truncate_inode_pages_range 2011-07-25 20:57:10 -07:00
util.c
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vmalloc.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
vmscan.c memcg: add memory.vmscan_stat 2011-07-26 16:49:42 -07:00
vmstat.c
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