From: Michal Hocko <mhocko@kernel.org>
To: linux-mm@kvack.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
Oleg Nesterov <oleg@redhat.com>,
David Rientjes <rientjes@google.com>,
Vladimir Davydov <vdavydov@parallels.com>,
Michal Hocko <mhocko@suse.com>
Subject: [PATCH v2 7/9] mm, oom: enforce exit_oom_victim on current task
Date: Thu, 25 Aug 2016 12:03:12 +0200 [thread overview]
Message-ID: <1472119394-11342-8-git-send-email-mhocko@kernel.org> (raw)
In-Reply-To: <1472119394-11342-1-git-send-email-mhocko@kernel.org>
From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
There are no users of exit_oom_victim on !current task anymore so
enforce the API to always work on the current.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Michal Hocko <mhocko@suse.com>
---
include/linux/oom.h | 2 +-
kernel/exit.c | 2 +-
mm/oom_kill.c | 5 ++---
3 files changed, 4 insertions(+), 5 deletions(-)
diff --git a/include/linux/oom.h b/include/linux/oom.h
index 0f1b9da108e4..b4e36e92bc87 100644
--- a/include/linux/oom.h
+++ b/include/linux/oom.h
@@ -69,7 +69,7 @@ extern unsigned long oom_badness(struct task_struct *p,
extern bool out_of_memory(struct oom_control *oc);
-extern void exit_oom_victim(struct task_struct *tsk);
+extern void exit_oom_victim(void);
extern int register_oom_notifier(struct notifier_block *nb);
extern int unregister_oom_notifier(struct notifier_block *nb);
diff --git a/kernel/exit.c b/kernel/exit.c
index bbdef62d6e3b..c36f8e0ab66d 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -435,7 +435,7 @@ static void exit_mm(struct task_struct *tsk)
mm_update_next_owner(mm);
mmput(mm);
if (test_thread_flag(TIF_MEMDIE))
- exit_oom_victim(tsk);
+ exit_oom_victim();
}
static struct task_struct *find_alive_thread(struct task_struct *p)
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 895a51fe8e18..3b990544db6d 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -662,10 +662,9 @@ static void mark_oom_victim(struct task_struct *tsk)
/**
* exit_oom_victim - note the exit of an OOM victim
*/
-void exit_oom_victim(struct task_struct *tsk)
+void exit_oom_victim(void)
{
- if (!test_and_clear_tsk_thread_flag(tsk, TIF_MEMDIE))
- return;
+ clear_thread_flag(TIF_MEMDIE);
if (!atomic_dec_return(&oom_victims))
wake_up_all(&oom_victims_wait);
--
2.8.1
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next prev parent reply other threads:[~2016-08-25 10:03 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-25 10:03 [PATCH v2 0/10] fortify oom killer even more Michal Hocko
2016-08-25 10:03 ` [PATCH v2 1/9] mm,oom_reaper: Reduce find_lock_task_mm() usage Michal Hocko
2016-08-25 10:03 ` [PATCH v2 2/9] mm,oom_reaper: Do not attempt to reap a task twice Michal Hocko
2016-08-25 10:03 ` [PATCH v2 3/9] oom: keep mm of the killed task available Michal Hocko
2016-08-25 10:03 ` [PATCH v2 4/9] kernel, oom: fix potential pgd_lock deadlock from __mmdrop Michal Hocko
2016-08-25 10:03 ` [PATCH v2 5/9] mm, oom: get rid of signal_struct::oom_victims Michal Hocko
2016-08-25 10:03 ` [PATCH v2 6/9] oom, suspend: fix oom_killer_disable vs. pm suspend properly Michal Hocko
2016-08-25 10:03 ` Michal Hocko [this message]
2016-08-25 10:03 ` [PATCH v2 8/9] mm: make sure that kthreads will not refault oom reaped memory Michal Hocko
2016-08-25 10:03 ` [PATCH v2 9/9] oom, oom_reaper: allow to reap mm shared by the kthreads Michal Hocko
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