linux-kernel - Re: 2.6.23.1: mdadm/raid5 hung/d-state

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Date:	Fri, 9 Nov 2007 04:14:27 -0500 (EST)
From:	Justin Piszcz <jpiszcz@...idpixels.com>
To:	Carlos Carvalho <carlos@...ica.ufpr.br>
cc:	Jeff Lessem <Jeff@...sem.org>, root@...l.ufpr.br,
	Dan Williams <dan.j.williams@...el.com>,
	BERTRAND Joël <joel.bertrand@...tella.fr>,
	Neil Brown <neilb@...e.de>, linux-kernel@...r.kernel.org,
	linux-raid@...r.kernel.org, xfs@....sgi.com
Subject: Re: 2.6.23.1: mdadm/raid5 hung/d-state



On Thu, 8 Nov 2007, Carlos Carvalho wrote:

> Jeff Lessem (Jeff@...sem.org) wrote on 6 November 2007 22:00:
> >Dan Williams wrote:
> > > The following patch, also attached, cleans up cases where the code looks
> > > at sh->ops.pending when it should be looking at the consistent
> > > stack-based snapshot of the operations flags.
> >
> >I tried this patch (against a stock 2.6.23), and it did not work for
> >me.  Not only did I/O to the effected RAID5 & XFS partition stop, but
> >also I/O to all other disks.  I was not able to capture any debugging
> >information, but I should be able to do that tomorrow when I can hook
> >a serial console to the machine.
> >
> >I'm not sure if my problem is identical to these others, as mine only
> >seems to manifest with RAID5+XFS.  The RAID rebuilds with no problem,
> >and I've not had any problems with RAID5+ext3.
>
> Us too! We're stuck trying to build a disk server with several disks
> in a raid5 array, and the rsync from the old machine stops writing to
> the new filesystem. It only happens under heavy IO. We can make it
> lock without rsync, using 8 simultaneous dd's to the array. All IO
> stops, including the resync after a newly created raid or after an
> unclean reboot.
>
> We could not trigger the problem with ext3 or reiser3; it only happens
> with xfs.
> -
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>

Including XFS mailing list as well can you provide more information to 
them?
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