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| author | David Rientjes <rientjes@google.com> | 2010-10-26 14:21:26 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-26 16:52:05 -0700 |
| commit | d19d5476f4b9f91d2de92b91588bb118beba6c0d (patch) | |
| tree | b267c225c2b7507f7e4900676649b20e56e06ba2 /kernel/rwsem.c | |
| parent | 723548bff1dde9ab6bdb23f4bb92277c4da49473 (diff) | |
| download | linux-d19d5476f4b9f91d2de92b91588bb118beba6c0d.tar.bz2 | |
oom: fix locking for oom_adj and oom_score_adj
The locking order in oom_adjust_write() and oom_score_adj_write() for
task->alloc_lock and task->sighand->siglock is reversed, and lockdep
notices that irqs could encounter an ABBA scenario.
This fixes the locking order so that we always take task_lock(task) prior
to lock_task_sighand(task).
Signed-off-by: David Rientjes <rientjes@google.com>
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Ying Han <yinghan@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/rwsem.c')
0 files changed, 0 insertions, 0 deletions