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| author | Oleg Nesterov | 2011-07-30 16:35:02 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2011-08-02 03:24:12 +0200 |
| commit | c027a474a68065391c8773f6e83ed5412657e369 (patch) | |
| tree | 6d3c8caba5ebf736c3f9ef3cacb708cbdb9869c2 /arch/avr32 | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg... (diff) | |
| download | kernel-qcow2-linux-c027a474a68065391c8773f6e83ed5412657e369.tar.gz kernel-qcow2-linux-c027a474a68065391c8773f6e83ed5412657e369.tar.xz kernel-qcow2-linux-c027a474a68065391c8773f6e83ed5412657e369.zip | |
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>
Diffstat (limited to 'arch/avr32')
0 files changed, 0 insertions, 0 deletions