From: Michal Hocko <mhocko@suse.cz>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Tejun Heo <tj@kernel.org>, Cong Wang <xiyou.wangcong@gmail.com>,
LKML <linux-kernel@vger.kernel.org>,
David Rientjes <rientjes@google.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [Patch v4 1/2] freezer: check OOM kill while being frozen
Date: Thu, 11 Sep 2014 16:10:51 +0200 [thread overview]
Message-ID: <20140911141051.GK22042@dhcp22.suse.cz> (raw)
In-Reply-To: <1943936.s0DGHUisGb@vostro.rjw.lan>
On Thu 11-09-14 16:26:56, Rafael J. Wysocki wrote:
> On Thursday, September 11, 2014 04:04:48 PM Michal Hocko wrote:
> > On Thu 11-09-14 16:17:56, Rafael J. Wysocki wrote:
> > [...]
> > > And I'm still wondering if the OOM killer may be made avoid killing frozen
> > > tasks.
> >
> > This is really tricky. OOM killer aims at the biggest memory hog. We
> > shouldn't ignore it just because it hides into the fridge... So even
> > if we "fix" oom killer to ignore frozen tasks (which is inherently
> > racy btw.) then we have a potential problem of freezer abuse (e.g. in
> > container environments). So I strongly believe that the OOM killer has
> > to be able to kill a frozen tasks.
>
> OK
>
> Is the OOM killer the only place where TIF_MEMDIE is set?
Yes. To be precise, lowmemorykiller (staging android thingy), global OOM
killer and memcg OOM killer. Any other users would be an abuse.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2014-09-11 14:11 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-04 22:30 Cong Wang
2014-09-04 22:30 ` [Patch v4 2/2] freezer: remove obsolete comments in __thaw_task() Cong Wang
2014-09-05 9:45 ` Michal Hocko
2014-09-05 14:09 ` Tejun Heo
2014-09-05 14:08 ` [Patch v4 1/2] freezer: check OOM kill while being frozen Tejun Heo
2014-09-05 16:31 ` Cong Wang
2014-09-05 18:00 ` Tejun Heo
2014-09-05 18:12 ` Cong Wang
2014-09-05 22:45 ` Tejun Heo
2014-09-05 23:32 ` Rafael J. Wysocki
2014-09-08 17:40 ` Cong Wang
2014-09-08 20:54 ` Rafael J. Wysocki
2014-09-08 20:58 ` Cong Wang
2014-09-08 21:53 ` Rafael J. Wysocki
2014-09-08 22:22 ` Tejun Heo
2014-09-08 22:48 ` Rafael J. Wysocki
2014-09-08 22:50 ` Tejun Heo
2014-09-08 23:15 ` Rafael J. Wysocki
2014-09-08 23:00 ` Cong Wang
2014-09-08 23:23 ` Rafael J. Wysocki
2014-09-08 23:16 ` Cong Wang
2014-09-08 23:42 ` Rafael J. Wysocki
2014-09-08 23:29 ` Cong Wang
2014-09-08 23:59 ` Rafael J. Wysocki
2014-09-10 20:30 ` Cong Wang
2014-09-10 23:38 ` Rafael J. Wysocki
2014-09-10 23:20 ` Cong Wang
2014-09-11 16:30 ` Michal Hocko
2014-09-12 23:59 ` Tejun Heo
2014-09-14 16:43 ` Rafael J. Wysocki
2014-09-15 0:56 ` Tejun Heo
2014-09-15 3:34 ` Rafael J. Wysocki
2014-09-15 9:36 ` Michal Hocko
2014-09-16 22:55 ` Cong Wang
2014-09-22 8:21 ` Michal Hocko
2014-09-09 15:16 ` Michal Hocko
2014-09-09 15:23 ` Tejun Heo
2014-09-09 16:06 ` Michal Hocko
2014-09-09 16:46 ` Tejun Heo
2014-09-09 17:12 ` Michal Hocko
2014-09-09 20:53 ` Rafael J. Wysocki
2014-09-10 13:24 ` Michal Hocko
2014-09-11 13:08 ` Michal Hocko
2014-09-11 14:17 ` Rafael J. Wysocki
2014-09-11 14:04 ` Michal Hocko
2014-09-11 14:26 ` Rafael J. Wysocki
2014-09-11 14:10 ` Michal Hocko [this message]
2014-09-11 14:32 ` Rafael J. Wysocki
2014-09-11 14:28 ` Michal Hocko
2014-09-11 14:52 ` Rafael J. Wysocki
2014-09-11 14:45 ` Michal Hocko
2014-09-14 16:39 ` Rafael J. Wysocki
2014-09-12 23:48 ` Tejun Heo
2014-09-15 14:28 ` Michal Hocko
2014-09-16 5:56 ` Tejun Heo
2014-09-09 20:48 ` Rafael J. Wysocki
2014-09-10 5:21 ` Cong Wang
2014-09-05 16:43 ` Cong Wang
2014-09-05 16:54 ` Michal Hocko
2014-09-15 11:22 ` Michal Hocko
2014-09-16 22:58 ` Cong Wang
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