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| author | David Rientjes <rientjes@google.com> | 2011-10-31 17:07:11 -0700 |
|---|---|---|
| committer | Ziyan <jaraidaniel@gmail.com> | 2016-03-11 15:56:34 +0100 |
| commit | c53fc67de39e70735188ec382d3ecebac5b9cdf3 (patch) | |
| tree | 86f3b19a2b0596e3cda5188eebb42a660ff83826 /kernel | |
| parent | a48d2f28a3edb19c6c2138575f0accdf6034e226 (diff) | |
| download | kernel_samsung_espresso10-c53fc67de39e70735188ec382d3ecebac5b9cdf3.tar.gz kernel_samsung_espresso10-c53fc67de39e70735188ec382d3ecebac5b9cdf3.tar.bz2 kernel_samsung_espresso10-c53fc67de39e70735188ec382d3ecebac5b9cdf3.zip | |
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