From: Christopher Lameter <cl-vYTEC60ixJUAvxtiuMwx3w@public.gmane.org>
To: Roman Gushchin <guro-b10kYP2dOMg@public.gmane.org>
Cc: linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
Michal Hocko <mhocko-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Vladimir Davydov
<vdavydov.dev-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>,
Tetsuo Handa
<penguin-kernel-JPay3/Yim36HaxMnTkn67Xf5DAMn2ifp@public.gmane.org>,
David Rientjes <rientjes-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
kernel-team-b10kYP2dOMg@public.gmane.org,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-doc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [v7 2/5] mm, oom: cgroup-aware OOM killer
Date: Thu, 7 Sep 2017 11:18:18 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.20.1709071114560.20082@nuc-kabylake> (raw)
In-Reply-To: <20170904142108.7165-3-guro-b10kYP2dOMg@public.gmane.org>
On Mon, 4 Sep 2017, Roman Gushchin wrote
> To address these issues, cgroup-aware OOM killer is introduced.
You are missing a major issue here. Processes may have allocation
constraints to memory nodes, special DMA zones etc etc. OOM conditions on
such resource constricted allocations need to be dealt with. Killing
processes that do not allocate with the same restrictions may not do
anything to improve conditions.
> But a user can change this behavior by enabling the per-cgroup
> oom_kill_all_tasks option. If set, it causes the OOM killer treat
> the whole cgroup as an indivisible memory consumer. In case if it's
> selected as on OOM victim, all belonging tasks will be killed.
Sounds good in general. Unless the cgroup or processes therein run out of
memory due to memory access restrictions. How do you detect that and how
it is handled?
next prev parent reply other threads:[~2017-09-07 16:18 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-04 14:21 [v7 0/5] " Roman Gushchin
2017-09-04 14:21 ` [v7 1/5] mm, oom: refactor the oom_kill_process() function Roman Gushchin
2017-09-05 13:34 ` Michal Hocko
2017-09-04 14:21 ` [v7 2/5] mm, oom: cgroup-aware OOM killer Roman Gushchin
2017-09-05 14:57 ` Michal Hocko
2017-09-05 20:23 ` Roman Gushchin
2017-09-06 8:31 ` Michal Hocko
2017-09-06 12:57 ` Roman Gushchin
2017-09-06 13:22 ` Michal Hocko
2017-09-06 13:41 ` Roman Gushchin
2017-09-06 14:10 ` Michal Hocko
2017-09-06 8:34 ` Michal Hocko
2017-09-06 12:33 ` Roman Gushchin
[not found] ` <20170904142108.7165-3-guro-b10kYP2dOMg@public.gmane.org>
2017-09-07 16:18 ` Christopher Lameter [this message]
2017-09-11 8:49 ` Michal Hocko
2017-09-04 14:21 ` [v7 3/5] mm, oom: introduce oom_priority for memory cgroups Roman Gushchin
2017-09-04 14:21 ` [v7 4/5] mm, oom, docs: describe the cgroup-aware OOM killer Roman Gushchin
2017-09-04 14:21 ` [v7 5/5] mm, oom: cgroup v2 mount option to disable " Roman Gushchin
2017-09-04 17:32 ` Shakeel Butt
2017-09-04 17:51 ` Roman Gushchin
2017-09-05 13:44 ` Michal Hocko
2017-09-05 14:30 ` Roman Gushchin
2017-09-05 15:12 ` Michal Hocko
2017-09-05 19:16 ` Roman Gushchin
2017-09-06 8:42 ` Michal Hocko
2017-09-06 17:40 ` Roman Gushchin
2017-09-06 17:59 ` Michal Hocko
2017-09-06 20:59 ` David Rientjes
2017-09-07 14:43 ` Christopher Lameter
2017-09-07 14:52 ` Roman Gushchin
[not found] ` <20170907145239.GA19022-B3w7+ongkCiLfgCeKHXN1g2O0Ztt9esIQQ4Iyu8u01E@public.gmane.org>
2017-09-07 15:03 ` Christopher Lameter
2017-09-07 16:42 ` Roman Gushchin
2017-09-07 17:03 ` Christopher Lameter
2017-09-07 21:55 ` David Rientjes
[not found] ` <20170905151251.luh4wogjd3msfqgf-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2017-09-07 16:21 ` Christopher Lameter
2017-09-05 21:53 ` Johannes Weiner
2017-09-06 8:28 ` Michal Hocko
2017-09-07 16:14 ` Johannes Weiner
2017-09-11 9:05 ` Michal Hocko
2017-09-11 12:50 ` Roman Gushchin
2017-09-07 16:27 ` Christopher Lameter
2017-09-07 22:03 ` David Rientjes
2017-09-08 21:07 ` Christopher Lameter
2017-09-09 8:45 ` David Rientjes
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