diff options
author | David Rientjes <rientjes@google.com> | 2011-10-31 17:07:11 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-31 17:30:45 -0700 |
commit | 7b0d44fa49b1dcfdcf4897f12ddd12ddeab1a9d7 (patch) | |
tree | c840608f5266e4ba783f4c4405efe89b69ae5754 /fs | |
parent | f660daac474c6f7c2d710100e29b3276a6f4db0a (diff) |
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 'fs')
0 files changed, 0 insertions, 0 deletions