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author | Anton Vorontsov <anton.vorontsov@linaro.org> | 2012-05-31 16:26:26 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-31 17:49:30 -0700 |
commit | 2c922c51e6924298f8271d75732964f1ffdecaf2 (patch) | |
tree | 7ce86f8702cdf9ad93ad37064654fa21a43f411b /kernel/cpu.c | |
parent | 137d1a26c842a384c98dd2a6a605014fddf5c777 (diff) | |
download | linux-2c922c51e6924298f8271d75732964f1ffdecaf2.tar.gz linux-2c922c51e6924298f8271d75732964f1ffdecaf2.tar.bz2 linux-2c922c51e6924298f8271d75732964f1ffdecaf2.zip |
um: properly check all process' threads for a live mm
kill_off_processes() might miss a valid process, this is because checking
for process->mm is not enough. Process' main thread may exit or detach
its mm via use_mm(), but other threads may still have a valid mm.
To catch this we use find_lock_task_mm(), which walks up all threads and
returns an appropriate task (with task lock held).
Suggested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Cc: Richard Weinberger <richard@nod.at>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/cpu.c')
0 files changed, 0 insertions, 0 deletions