diff options
| author |   Michal Hocko <mhocko@suse.com> | 2016-10-07 16:58:57 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-07 18:46:27 -0700 |
| commit | 862e3073b3eed13f17bd6be6ca6052db15c0b728 (patch) | |
| tree | 3fd7303c9f3a35984ea72a9e2ccdd9d25ace9bbb /include/linux/oom.h | |
| parent | kernel, oom: fix potential pgd_lock deadlock from __mmdrop (diff) | |
| download | linux-dev-862e3073b3eed13f17bd6be6ca6052db15c0b728.tar.xz linux-dev-862e3073b3eed13f17bd6be6ca6052db15c0b728.zip | |
mm, oom: get rid of signal_struct::oom_victims
After "oom: keep mm of the killed task available" we can safely detect
an oom victim by checking task->signal->oom_mm so we do not need the
signal_struct counter anymore so let's get rid of it.
This alone wouldn't be sufficient for nommu archs because
exit_oom_victim doesn't hide the process from the oom killer anymore.
We can, however, mark the mm with a MMF flag in __mmput. We can reuse
MMF_OOM_REAPED and rename it to a more generic MMF_OOM_SKIP.
Link: http://lkml.kernel.org/r/1472119394-11342-6-git-send-email-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Vladimir Davydov <vdavydov@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/oom.h')
| -rw-r--r-- | include/linux/oom.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/oom.h b/include/linux/oom.h index 17946e5121b6..b61357d07170 100644 --- a/include/linux/oom.h +++ b/include/linux/oom.h @@ -58,6 +58,11 @@ static inline bool oom_task_origin(const struct task_struct *p) return p->signal->oom_flag_origin; } +static inline bool tsk_is_oom_victim(struct task_struct * tsk) +{ + return tsk->signal->oom_mm; +} + extern unsigned long oom_badness(struct task_struct *p, struct mem_cgroup *memcg, const nodemask_t *nodemask, unsigned long totalpages); |