From: "Jörn Engel" <joern@logfs.org>
To: Michal Hocko <mhocko@suse.cz>
Cc: linux-mm@kvack.org, Greg Thelen <gthelen@google.com>,
Glauber Costa <glommer@gmail.com>, Mel Gorman <mgorman@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
David Rientjes <rientjes@google.com>,
Rik van Riel <riel@redhat.com>, Hugh Dickins <hughd@google.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: user defined OOM policies
Date: Thu, 21 Nov 2013 19:19:00 -0500 [thread overview]
Message-ID: <20131122001859.GA9510@logfs.org> (raw)
In-Reply-To: <20131119131400.GC20655@dhcp22.suse.cz>
On Tue, 19 November 2013 14:14:00 +0100, Michal Hocko wrote:
>
> We have basically ended up with 3 options AFAIR:
> 1) allow memcg approach (memcg.oom_control) on the root level
> for both OOM notification and blocking OOM killer and handle
> the situation from the userspace same as we can for other
> memcgs.
> 2) allow modules to hook into OOM killer path and take the
> appropriate action.
> 3) create a generic filtering mechanism which could be
> controlled from the userspace by a set of rules (e.g.
> something analogous to packet filtering).
One ancient option I sometime miss was this:
- Kill the biggest process.
Doesn't always make the optimal choice, but neither did any of the
refinements. But it had the nice advantage that even I could predict
which bad choice it would make and why. Every bit of sophistication
means that you still get it wrong sometimes, but in less obvious and
more annoying ways.
Then again, an alternative I actually use in production is to reboot
the machine on OOM. Again, very simple, very blunt and very
predictable.
JA?rn
--
No art, however minor, demands less than total dedication if you want
to excel in it.
-- Leon Battista Alberti
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next prev parent reply other threads:[~2013-11-22 1:39 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-19 13:14 user defined OOM policies Michal Hocko
2013-11-19 13:40 ` Michal Hocko
2013-11-20 8:02 ` David Rientjes
2013-11-20 15:22 ` Michal Hocko
2013-11-20 17:14 ` Luigi Semenzato
2013-11-21 3:36 ` David Rientjes
2013-11-21 7:03 ` Luigi Semenzato
2013-11-22 18:08 ` Johannes Weiner
2013-11-28 11:36 ` Michal Hocko
2013-11-26 1:29 ` David Rientjes
2013-11-28 11:42 ` Michal Hocko
2013-12-02 23:09 ` David Rientjes
2013-11-21 3:33 ` David Rientjes
2013-11-28 11:54 ` Michal Hocko
2013-12-02 23:07 ` David Rientjes
2013-12-04 5:19 ` [patch 1/8] fork: collapse copy_flags into copy_process David Rientjes
2013-12-04 5:19 ` [patch 2/8] mm, mempolicy: rename slab_node for clarity David Rientjes
2013-12-04 15:21 ` Christoph Lameter
2013-12-04 5:20 ` [patch 3/8] mm, mempolicy: remove per-process flag David Rientjes
2013-12-04 15:24 ` Christoph Lameter
2013-12-05 0:53 ` David Rientjes
2013-12-05 19:05 ` Christoph Lameter
2013-12-05 23:53 ` David Rientjes
2013-12-06 14:46 ` Christoph Lameter
2013-12-04 5:20 ` [patch 4/8] mm, memcg: add tunable for oom reserves David Rientjes
2013-12-04 5:20 ` [patch 5/8] res_counter: remove interface for locked charging and uncharging David Rientjes
2013-12-04 5:20 ` [patch 6/8] res_counter: add interface for maximum nofail charge David Rientjes
2013-12-04 5:20 ` [patch 7/8] mm, memcg: allow processes handling oom notifications to access reserves David Rientjes
2013-12-04 5:45 ` Johannes Weiner
2013-12-05 1:49 ` David Rientjes
2013-12-05 2:50 ` Tejun Heo
2013-12-05 23:49 ` David Rientjes
2013-12-06 17:34 ` Johannes Weiner
2013-12-07 16:38 ` Tim Hockin
2013-12-07 17:40 ` Johannes Weiner
2013-12-07 18:12 ` Tim Hockin
2013-12-07 19:06 ` Johannes Weiner
2013-12-07 21:04 ` Tim Hockin
2013-12-06 19:01 ` Tejun Heo
2013-12-09 20:10 ` David Rientjes
2013-12-09 22:37 ` Johannes Weiner
2013-12-10 21:50 ` Tejun Heo
2013-12-10 23:55 ` David Rientjes
2013-12-11 9:49 ` Mel Gorman
2013-12-11 12:42 ` Tejun Heo
2013-12-12 5:37 ` Tim Hockin
2013-12-12 14:21 ` Tejun Heo
2013-12-12 16:32 ` Michal Hocko
2013-12-12 16:37 ` Tejun Heo
2013-12-12 18:42 ` Tim Hockin
2013-12-12 19:23 ` Tejun Heo
2013-12-13 0:23 ` Tim Hockin
2013-12-13 11:47 ` Tejun Heo
2013-12-04 5:20 ` [patch 8/8] mm, memcg: add memcg oom reserve documentation David Rientjes
2013-11-20 17:25 ` user defined OOM policies Vladimir Murzin
2013-11-20 17:21 ` Vladimir Murzin
2013-11-20 17:33 ` Michal Hocko
2013-11-21 3:38 ` David Rientjes
2013-11-21 17:13 ` Michal Hocko
2013-11-26 1:36 ` David Rientjes
2013-11-22 7:28 ` Vladimir Murzin
2013-11-22 13:18 ` Michal Hocko
2013-11-20 7:50 ` David Rientjes
2013-11-22 0:19 ` Jörn Engel [this message]
2013-11-26 1:31 ` David Rientjes
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