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Re: xfs and raid5 - "Structure needs cleaning for directory open"

To: xfs@xxxxxxxxxxx
Subject: Re: xfs and raid5 - "Structure needs cleaning for directory open"
From: Mark Goodwin <goodwinos@xxxxxxxxx>
Date: Mon, 10 May 2010 16:53:54 +1000
In-reply-to: <20100510022033.GB7165@dastard>
References: <20100510022033.GB7165@dastard>
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.8) Gecko/20100301 Fedora/3.0.3-1.fc12 Thunderbird/3.0.3
On 05/10/2010 12:20 PM, Dave Chinner wrote:
On Sun, May 09, 2010 at 08:48:00PM +0200, Rainer Fuegenstein wrote:

today in the morning some daemon processes terminated because of
errors in the xfs file system on top of a software raid5, consisting
of 4*1.5TB WD caviar green SATA disks.

Reminds me of a recent(-ish) md/dm readahead cancellation fix - that
would fit the symptoms of (btree corruption showing up under heavy IO
load but no corruption on disk. However, I can't seem to find any
references to it at the moment (can't remember the bug title), but
perhaps your distro doesn't have the fix in it?

If it's the bug that Dave's thinking of, it's an issue with md
error handling and the BIO_UPTODATE flag, see :
http://www.mail-archive.com/linux-raid@xxxxxxxxxxxxxxx/msg06628.html

For RHEL, this is addressed in Red Hat BZ 512552
https://bugzilla.redhat.com/show_bug.cgi?id=512552

upstream commit c2b00852fbae4f8c45c2651530ded3bd01bde814

Cheers
-- Mark

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