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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: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Fri, 29 Apr 2011 09:37:51 +1000
Cc: LKML <linux-kernel@xxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
In-reply-to: <alpine.DEB.2.01.1104281008320.18728@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>
User-agent: Mutt/1.5.20 (2009-06-14)
On Thu, Apr 28, 2011 at 10:30:47AM -0700, Christian Kujau wrote:
> Hi David,
> sorry for the late response:
> On Wed, 27 Apr 2011 at 20:28, Dave Chinner wrote:
> > hmmmm. Speaking of which - have you changed any of the XFS tunables
> > in /proc/sys/fs/xfs/ on your machine (specifically
> > xfssyncd_centisecs)?
> No, I did not change anything underneath /proc/sys/fs/xfs.
> > Not easy because there are tree-wide changes that need to be
> > preserved (e.g. block layer plugging changes) while others around it
> > would need to be reverted....
> Yeah, I noticed. I wanted to do something like this:
>   $ for c in `git log --pretty=oneline --no-merges v2.6.38..v2.6.39-rc2 
> fs/xfs | awk '{print $1}'`; do
>        git revert $c
>     done
> ...but this broke on the 1st or 2nd commit because of unresolved changes.
> Now I'm in the middle of another bisect attempt, trying to reproduce but 
> Im getting (probably totally unrelated) warnings here:

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?


Dave Chinner

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