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Message-ID: <20080326232354.GA19839@lanczos.q-leap.de>
Date:	Thu, 27 Mar 2008 00:23:54 +0100
From:	Bernd Schubert <bs@...eap.de>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: mballoc errors

On Wed, Mar 26, 2008 at 04:41:22PM -0500, Eric Sandeen wrote:
> This report just came in on the fedora list...
> 
> EXT4-fs error (device dm-0): ext4_mb_generate_buddy: EXT4-fs: group 717:
> 23410 blocks in bitmap, 23411 in gd
> 
> EXT4-fs error (device dm-0): ext4_mb_generate_buddy: EXT4-fs: group 721:
> 19309 blocks in bitmap, 19333 in gd
> 
> has anyone else seen this problem in testing?  I guess it means
> freespace accounting got out of sync...?

We have seen this on ldiskfs, one time a hardware raid was writing data 
garbage and one time it was after a Lustre upgrade from 1.4 to 1.6 with
a filesystem that probably already had errors before the upgrade.

So maybe this message is a good indicator for generic problems?


Cheers,
Bernd
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