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| author | Shakeel Butt | 2019-07-12 06:00:23 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2019-07-12 20:05:47 +0200 |
| commit | 5eee7e1cdb97123bb55ac14ccd3af8b6edc31537 (patch) | |
| tree | 599719a7a9b06d61532fe62b8c4dab76165ba624 /mm/memcontrol.c | |
| parent | mm: memcontrol: use CSS_TASK_ITER_PROCS at mem_cgroup_scan_tasks() (diff) | |
| download | kernel-qcow2-linux-5eee7e1cdb97123bb55ac14ccd3af8b6edc31537.tar.gz kernel-qcow2-linux-5eee7e1cdb97123bb55ac14ccd3af8b6edc31537.tar.xz kernel-qcow2-linux-5eee7e1cdb97123bb55ac14ccd3af8b6edc31537.zip | |
mm, oom: refactor dump_tasks for memcg OOMs
dump_tasks() traverses all the existing processes even for the memcg OOM
context which is not only unnecessary but also wasteful. This imposes a
long RCU critical section even from a contained context which can be quite
disruptive.
Change dump_tasks() to be aligned with select_bad_process and use
mem_cgroup_scan_tasks to selectively traverse only processes of the target
memcg hierarchy during memcg OOM.
Link: http://lkml.kernel.org/r/20190617231207.160865-1-shakeelb@google.com
Signed-off-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Roman Gushchin <guro@fb.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: David Rientjes <rientjes@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Paul Jackson <pj@sgi.com>
Cc: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
0 files changed, 0 insertions, 0 deletions