From: John Lister <john.lister@kickstone.com>
To: Dave Chinner <david@fromorbit.com>
Cc: xfs@oss.sgi.com
Subject: Re: XFS defragmentation issue
Date: Sat, 11 Sep 2010 09:25:18 +0100 [thread overview]
Message-ID: <4C8B3CEE.6070909@kickstone.com> (raw)
In-Reply-To: <20100911082330.GG705@dastard>
On 11/09/2010 09:23, Dave Chinner wrote:
> On Sat, Sep 11, 2010 at 07:55:32AM +0100, John Lister wrote:
>> Stan Hoeppner wrote on 9/10/2010 14:00
>>>> On 10/09/2010 15:41, John Lister wrote:
>>> Try unmounting and remounting the filesystem, and see if the various
>>> tools all report the same thing afterwards. This solved the exact same
>>> problem for me very recently, though I'm on kernel 2.6.34.1 and xfsprogs
>>> 2.9.8.
>> Cheers, that got rid of most of it, there is still a slight
>> discrepency (50 extra fragments) which I can live with.
> xfs_db used buffered IO on the block device, which is not coherent
> with the filesystem. If you are using it on an active filesystem,
> then running "echo 1> /proc/sys/vm/drop_caches" before you run
> xfs_db should make it read from disk at least once....
Ah, that makes more sense, I'll give it a go.
Thanks
John
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next prev parent reply other threads:[~2010-09-11 8:24 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-10 14:41 XFS defragmentation issue John Lister
2010-09-10 19:00 ` Stan Hoeppner
2010-09-11 6:55 ` John Lister
2010-09-11 8:23 ` Dave Chinner
2010-09-11 8:25 ` John Lister [this message]
2010-09-11 19:38 ` Stan Hoeppner
2010-09-11 19:57 ` Iustin Pop
2010-09-12 1:01 ` Dave Chinner
2010-09-12 8:43 ` Emmanuel Florac
2010-09-12 9:45 ` Stan Hoeppner
2010-09-13 8:05 ` Roel van Meer
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