From: Roman Gushchin <guro@fb.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
David Rientjes <rientjes@google.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/2] mm, oom: do not grant oom victims full memory reserves access
Date: Tue, 1 Aug 2017 13:23:44 +0100 [thread overview]
Message-ID: <20170801122344.GA8457@castle.DHCP.thefacebook.com> (raw)
In-Reply-To: <20170801121643.GI15774@dhcp22.suse.cz>
On Tue, Aug 01, 2017 at 02:16:44PM +0200, Michal Hocko wrote:
> On Thu 27-07-17 11:03:55, Michal Hocko wrote:
> > Hi,
> > this is a part of a larger series I posted back in Oct last year [1]. I
> > have dropped patch 3 because it was incorrect and patch 4 is not
> > applicable without it.
> >
> > The primary reason to apply patch 1 is to remove a risk of the complete
> > memory depletion by oom victims. While this is a theoretical risk right
> > now there is a demand for memcg aware oom killer which might kill all
> > processes inside a memcg which can be a lot of tasks. That would make
> > the risk quite real.
> >
> > This issue is addressed by limiting access to memory reserves. We no
> > longer use TIF_MEMDIE to grant the access and use tsk_is_oom_victim
> > instead. See Patch 1 for more details. Patch 2 is a trivial follow up
> > cleanup.
>
> Any comments, concerns? Can we merge it?
I've rebased the cgroup-aware OOM killer and ran some tests.
Everything works well.
Thanks!
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next prev parent reply other threads:[~2017-08-01 12:24 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-27 9:03 [PATCH 0/2] mm, oom: do not grant oom victims full memory reserves access Michal Hocko
2017-07-27 9:03 ` [PATCH 1/2] mm, oom: do not rely on TIF_MEMDIE for " Michal Hocko
2017-08-01 15:30 ` Tetsuo Handa
2017-08-01 16:52 ` Michal Hocko
2017-08-02 6:10 ` Michal Hocko
2017-08-03 1:39 ` Tetsuo Handa
2017-08-03 7:06 ` Michal Hocko
2017-08-03 8:03 ` Tetsuo Handa
2017-08-03 8:21 ` Michal Hocko
2017-08-02 8:29 ` [PATCH v2 " Michal Hocko
2017-08-03 9:37 ` Mel Gorman
2017-08-03 11:00 ` Michal Hocko
2017-08-03 12:22 ` Mel Gorman
2017-07-27 9:03 ` [PATCH 2/2] mm: replace TIF_MEMDIE checks by tsk_is_oom_victim Michal Hocko
2017-07-27 14:01 ` Tetsuo Handa
2017-07-27 14:08 ` Tetsuo Handa
2017-07-27 14:18 ` Michal Hocko
2017-07-27 14:45 ` Michal Hocko
2017-07-27 14:55 ` Roman Gushchin
2017-07-29 8:33 ` kbuild test robot
2017-07-31 6:46 ` Michal Hocko
2017-08-01 12:16 ` [PATCH 0/2] mm, oom: do not grant oom victims full memory reserves access Michal Hocko
2017-08-01 12:23 ` Roman Gushchin [this message]
2017-08-01 12:29 ` Michal Hocko
2017-08-01 12:42 ` Roman Gushchin
2017-08-01 12:54 ` Michal Hocko
2017-08-07 14:21 ` Michal Hocko
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