Date: Fri, 3 Oct 2008 09:52:11 +1000
From: Dave Chinner <david@fromorbit.com>
To: Albert Graham <albert.graham@g-b.net>
Cc: xfs@oss.sgi.com
Subject: Re: XFS Regression Issue in kernel 2.6.26.3
Message-ID: <20081002235211.GI30001@disturbed>
Mail-Followup-To: Albert Graham <albert.graham@g-b.net>,
	xfs@oss.sgi.com
References: <48E51BF5.3080100@g-b.net>
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On Thu, Oct 02, 2008 at 08:07:33PM +0100, Albert Graham wrote:
> Hi Guys,
>
> I use Fedora 8 as my MythTV backend server which uses XFS, ISince 
> upgrading from kernel-2.6.25 to kernel-2.6.26 I've been getting the 
> following errors (see below).

The freespace btrees are getting out of sync for some reason.

That is, when we go to allocate an extent, we have to update two
free space btrees. This shutdown:

> XFS internal error XFS_WANT_CORRUPTED_RETURN at line 280 of file fs/xfs/xfs_alloc.c.  Caller 0xf88e0018

Indicates the extent being allocated was not found in one of the
two trees.

This corruption could have happened a long time ago in the past, and
it may simply be coincidental that you've tripped over this at
roughly the same time you upgraded the kernel.

Can you run xfs_check on the filesystem to determine if a freespace
tree is corrupted (post the output if it is), then run xfs_repair
to rebuild them?

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com