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Re: xfs deadlock in stable kernel 3.0.4

To: Stefan Priebe - Profihost AG <s.priebe@xxxxxxxxxxxx>
Subject: Re: xfs deadlock in stable kernel 3.0.4
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Sun, 18 Sep 2011 16:04:38 -0400
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>, "xfs-masters@xxxxxxxxxxx" <xfs-masters@xxxxxxxxxxx>, "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>, aelder@xxxxxxx
In-reply-to: <4E75B660.1030502@xxxxxxxxxxxx>
References: <1D2B34A7-7BB9-4E4E-9CA2-382C210E125F@xxxxxxxxxxxx> <20110912152133.GA8345@xxxxxxxxxxxxx> <C6515E45-5724-43DD-95A8-1F89AFE29601@xxxxxxxxxxxx> <20110912200543.GA22409@xxxxxxxxxxxxx> <4E6EF274.7050007@xxxxxxxxxxxx> <20110913205018.GA8543@xxxxxxxxxxxxx> <4E70571A.80108@xxxxxxxxxxxx> <4E705C42.6020909@xxxxxxxxxxxx> <20110914143005.GA28496@xxxxxxxxxxxxx> <4E75B660.1030502@xxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Sun, Sep 18, 2011 at 11:14:08AM +0200, Stefan Priebe - Profihost AG wrote:
> Hi,
> 
> at least i'm now able to reproduce the issue. I hope this will help
> to investigate the issue and hopefully you can reproduce it as well.
> 
> I'm using vanilla 3.0.4 kernel + xfs as root filesystem and had
> detect hanging taks with 120s set. You'll then see that the bonnie++
> command get's stuck in xlog_grant_log_space while creating or
> deleting files. I was using a SSD or a fast Raid 10 (24x SAS Disks)
> - i was not able to reproduce it on normal SATA disks even a 20x
> SATA Raid 10 didn't work.

Thanks a lot for the reproducer!

I've tried it on my laptop SSD and that didn't reproduce it yet.  I'll
try it on monday on a real high end setup.

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