linux-kernel - Re: oomkillers gone wild.

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Message-ID: <20120605174454.GA23867@redhat.com>
Date:	Tue, 5 Jun 2012 13:44:54 -0400
From:	Dave Jones <davej@...hat.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>, linux-mm@...ck.org
Subject: Re: oomkillers gone wild.

On Mon, Jun 04, 2012 at 04:30:57PM -0700, David Rientjes wrote:
 > On Mon, 4 Jun 2012, Dave Jones wrote:
 > 
 > > we picked this..
 > > 
 > > [21623.066911] [  588]     0   588    22206        1   2       0             0 dhclient
 > > 
 > > over say..
 > > 
 > > [21623.116597] [ 7092]  1000  7092  1051124    31660   3       0             0 trinity-child3
 > > 
 > > What went wrong here ?
 > > 
 > > And why does that score look so.. weird.
 > > 
 > 
 > It sounds like it's because pid 588 has uid=0 and the adjustment for root 
 > processes is causing an overflow.  I assume this fixes it?

Still doesn't seem right..

eg..

[42309.542776] [ pid ]   uid  tgid total_vm      rss cpu oom_adj oom_score_adj name
..
[42309.553933] [  500]    81   500     5435        1   4     -13          -900 dbus-daemon
..
[42309.597531] [ 9054]  1000  9054   528677    14540   3       0             0 trinity-child3
..

[42309.643057] Out of memory: Kill process 500 (dbus-daemon) score 511952 or sacrifice child
[42309.643620] Killed process 500 (dbus-daemon) total-vm:21740kB, anon-rss:0kB, file-rss:4kB

and a slew of similar 'wrong process' death spiral kills follows..


	Dave

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