From: Dave Chinner <david@fromorbit.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: xfs@oss.sgi.com
Subject: Re: [PATCH 01/12] repair: do not walk the unlinked inode list
Date: Tue, 13 Dec 2011 09:55:06 +1100 [thread overview]
Message-ID: <20111212225506.GU14273@dastard> (raw)
In-Reply-To: <20111202174741.091561992@bombadil.infradead.org>
On Fri, Dec 02, 2011 at 12:46:20PM -0500, Christoph Hellwig wrote:
> Stefan Pfetzing reported a bug where xfs_repair got stuck eating 100% CPU in
> phase3. We track it down to a loop in the unlinked inode list, apparently
> caused by memory corruption on an iSCSI target.
>
> I looked into tracking if we already saw a given unlinked inode, but given
> that we keep walking even for inodes where we can't find an allocation btree
> record that seems infeasible. On the other hand these inodes had their
> final unlink and thus were dead even before the system went down. There
> really is no point in adding them to the uncertain list and looking for
> references to them later.
>
> So the simplest fix seems to be to simply remove the unlinked inode list
> walk and just clear it - when we rebuild the inode allocation btrees these
> will simply be marked free.
>
> Reported-by: Stefan Pfetzing <stefan.pfetzing@1und1.de>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
After further consideration, this is probably fine as all the
unlinked inodes do get picked up elsewhere.
Reviewed-by: Dave Chinner <dchinner@redhat.com>
--
Dave Chinner
david@fromorbit.com
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next prev parent reply other threads:[~2011-12-12 22:55 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-02 17:46 [PATCH 00/12] xfs_repair queue Christoph Hellwig
2011-12-02 17:46 ` [PATCH 01/12] repair: do not walk the unlinked inode list Christoph Hellwig
2011-12-12 22:55 ` Dave Chinner [this message]
2012-01-12 19:30 ` Mark Tinguely
2011-12-02 17:46 ` [PATCH 02/12] repair: allocate and free inode records individually Christoph Hellwig
2011-12-12 23:16 ` Dave Chinner
2012-01-12 22:38 ` Mark Tinguely
2011-12-02 17:46 ` [PATCH 03/12] repair: allocate and free extent " Christoph Hellwig
2011-12-12 23:21 ` Dave Chinner
2012-01-12 22:39 ` Mark Tinguely
2011-12-02 17:46 ` [PATCH 04/12] xfsprogs: allow linking against libtcmalloc Christoph Hellwig
2011-12-13 0:05 ` Dave Chinner
2011-12-18 22:47 ` Christoph Hellwig
2011-12-02 17:46 ` [PATCH 05/12] repair: update extent count after zapping duplicate blocks Christoph Hellwig
2011-12-13 2:12 ` Dave Chinner
2012-02-02 12:39 ` [PATCH v2] " Christoph Hellwig
2012-02-02 18:19 ` Mark Tinguely
2012-01-13 17:18 ` [PATCH 05/12] " Mark Tinguely
2011-12-02 17:46 ` [PATCH 06/12] repair: use recursive buffer locking Christoph Hellwig
2011-12-13 2:22 ` Dave Chinner
2011-12-18 22:54 ` Christoph Hellwig
2012-01-13 20:10 ` Mark Tinguely
2011-12-02 17:46 ` [PATCH 07/12] repair: fix another ABBA deadlock in inode prefetching Christoph Hellwig
2011-12-13 2:35 ` Dave Chinner
2012-01-13 18:51 ` Mark Tinguely
2011-12-02 17:46 ` [PATCH 08/12] repair: handle filesystems with the log in allocation group 0 Christoph Hellwig
2011-12-13 2:36 ` Dave Chinner
2012-01-13 15:18 ` Mark Tinguely
2011-12-02 17:46 ` [PATCH 09/12] repair: kill check_inode_block Christoph Hellwig
2012-01-11 11:29 ` Christoph Hellwig
2012-01-11 21:28 ` Mark Tinguely
2011-12-02 17:46 ` [PATCH 10/12] repair: mark local functions static Christoph Hellwig
2012-01-11 11:30 ` Christoph Hellwig
2012-01-11 21:37 ` Mark Tinguely
2011-12-02 17:46 ` [PATCH 11/12] repair: move extern declarations to headers Christoph Hellwig
2012-01-11 11:30 ` Christoph Hellwig
2012-01-11 21:40 ` Mark Tinguely
2011-12-02 17:46 ` [PATCH 12/12] repair: cleanup inode record macros Christoph Hellwig
2012-01-11 11:30 ` Christoph Hellwig
2012-01-12 17:05 ` Mark Tinguely
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