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Message-ID: <20090104074659.GA16775@infradead.org>
Date:	Sun, 4 Jan 2009 02:46:59 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	Adam Nielsen <a.nielsen@...kadi.net>
Cc:	LKML Mailinglist <linux-kernel@...r.kernel.org>
Subject: Re: XFS internal error xfs_da_do_buf(1) at line 2015 of file
	fs/xfs/xfs_da_btree.c

On Sun, Jan 04, 2009 at 11:16:22AM +1000, Adam Nielsen wrote:
> Hi all,
>
> I'm having a recurring problem with XFS which started about a day ago.  
> All of a sudden when reading a certain part of the disk (not sure where, 
> but my nightly backups trigger it) I get an infinite loop of these 
> messages appearing in my logs:
>
> xfs_da_do_buf: bno 8388608
> dir: inode 3087268096
> Filesystem "md0": XFS internal error xfs_da_do_buf(1) at line 2015 of 
> file fs/xfs/xfs_da_btree.c.  Caller 0xffffffff802eba63
> Pid: 4445, comm: metalog Tainted: P           2.6.28-rc2 #3

This is a typical result of a power loss scenario with write caches
enabled and without barriers.  Given that md can't pass through barriers
did you disable the write caches on your disk?

> Does anyone know what this error means?  Do I need to reformat the filesystem?

Run xfs_repair over it to fix up the directory, and make sure to
configure your disks properly so that it doesn't happen again..

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