diff options
| author | Oleg Nesterov <[email protected]> | 2014-06-04 16:07:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2014-06-04 16:54:03 -0700 |
| commit | f87fb599ae4d2a152a93f9821b94f3158146d097 (patch) | |
| tree | 8b64fc4a17246ab6988d7f09c18ee4f0af6b51e4 | |
| parent | f7e2f7e896d8b74e92b687f7333721fd7be0f4b5 (diff) | |
memcg: mm_update_next_owner() should skip kthreads
"Search through everything else" in mm_update_next_owner() can hit a
kthread which adopted this "mm" via use_mm(), it should not be used as
mm->owner. Add the PF_KTHREAD check.
While at it, change this code to use for_each_process_thread() instead
of deprecated do_each_thread/while_each_thread.
Signed-off-by: Oleg Nesterov <[email protected]>
Reviewed-by: Michal Hocko <[email protected]>
Cc: Balbir Singh <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: KAMEZAWA Hiroyuki <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Peter Chiang <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | kernel/exit.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index da1b838de8a6..5ac3c19c245c 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -395,14 +395,12 @@ retry: } /* - * Search through everything else. We should not get - * here often + * Search through everything else, we should not get here often. */ - do_each_thread(g, c) { - if (c->mm == mm) + for_each_process_thread(g, c) { + if (!(c->flags & PF_KTHREAD) && c->mm == mm) goto assign_new_owner; - } while_each_thread(g, c); - + } read_unlock(&tasklist_lock); /* * We found no owner yet mm_users > 1: this implies that we are |