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Re: 2.6.39-rc4+: oom-killer busy killing tasks

To: Christian Kujau <lists@xxxxxxxxxxxxxxx>
Subject: Re: 2.6.39-rc4+: oom-killer busy killing tasks
From: Markus Trippelsdorf <markus@xxxxxxxxxxxxxxx>
Date: Fri, 29 Apr 2011 22:17:01 +0200
Cc: Dave Chinner <david@xxxxxxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx, minchan.kim@xxxxxxxxx
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In-reply-to: <alpine.DEB.2.01.1104291250480.18728@xxxxxxxxxxxxxx>
References: <alpine.DEB.2.01.1104211841510.18728@xxxxxxxxxxxxxx> <20110424234655.GC12436@dastard> <alpine.DEB.2.01.1104242245090.18728@xxxxxxxxxxxxxx> <alpine.DEB.2.01.1104250015480.18728@xxxxxxxxxxxxxx> <20110427022655.GE12436@dastard> <alpine.DEB.2.01.1104270042510.18728@xxxxxxxxxxxxxx> <20110427102824.GI12436@dastard> <alpine.DEB.2.01.1104281008320.18728@xxxxxxxxxxxxxx> <20110428233751.GR12436@dastard> <alpine.DEB.2.01.1104291250480.18728@xxxxxxxxxxxxxx>
On 2011.04.29 at 12:58 -0700, Christian Kujau wrote:
> On Fri, 29 Apr 2011 at 09:37, Dave Chinner wrote:
> > Did you read the email that pointed to CONFIG_TINY_RCU as the
> > ptotential source of the problem? Can you change to CONFIG_TREE_RCU
> > and see if the problem goes away?
> Tried with TREE_RCU, unfortunately the problem persists. However, the OOM 
> messages did not make it to the disk this time. Syslog continued to work 
> until 11:51 (local time), the slabinfo-8-TREE_RCU.txt file was written to 
> until 11:57, the machine was already unusable at that point. At 12:07 I 
> took a "screenshot" and then powercycled the machine:
>   http://nerdbynature.de/bits/2.6.39-rc4/oom/
>   (The files marked with -8 are the current ones)
> Btw, the xfs filesystem I'm du'ing over is still mounted with "noatime".
> Any ideas? Patches to try?

I could be the hrtimer bug again. Would you try to reproduce the issue
with this patch applied?


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