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| author | David Rientjes <rientjes@google.com> | 2011-10-31 17:07:11 -0700 |
|---|---|---|
| committer | Ziyan <jaraidaniel@gmail.com> | 2015-01-15 20:49:07 +0100 |
| commit | c4d0e26eb007a404e3f0a02718b07b046634bc16 (patch) | |
| tree | 6db5895b53592a836f581040f3ac42e291304488 /kernel | |
| parent | 7f63f0a4cea2b18f46d42a47699d97a65cacb28e (diff) | |
| download | kernel_samsung_tuna-c4d0e26eb007a404e3f0a02718b07b046634bc16.zip kernel_samsung_tuna-c4d0e26eb007a404e3f0a02718b07b046634bc16.tar.gz kernel_samsung_tuna-c4d0e26eb007a404e3f0a02718b07b046634bc16.tar.bz2 | |
oom: avoid killing kthreads if they assume the oom killed thread's mm
After selecting a task to kill, the oom killer iterates all processes and
kills all other threads that share the same mm_struct in different thread
groups. It would not otherwise be helpful to kill a thread if its memory
would not be subsequently freed.
A kernel thread, however, may assume a user thread's mm by using
use_mm(). This is only temporary and should not result in sending a
SIGKILL to that kthread.
This patch ensures that only user threads and not kthreads are sent a
SIGKILL if they share the same mm_struct as the oom killed task.
Signed-off-by: David Rientjes <rientjes@google.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions