linux-ext4 - [Bug 12815] JBD: barrier-based sync failed on dm-1:8

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Message-Id: <20090304171503.983E611D108@picon.linux-foundation.org>
Date:	Wed,  4 Mar 2009 09:15:03 -0800 (PST)
From:	bugme-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 12815] JBD: barrier-based sync failed on dm-1:8 - disabling barriers  -- and then hang

http://bugzilla.kernel.org/show_bug.cgi?id=12815





------- Comment #4 from sandeen@...hat.com  2009-03-04 09:15 -------
(In reply to comment #3)
> I'm getting the JBD message not only on initial mount. Is that still expected?

You should get it on each mount.  When else do you see it?

> I'll try to get some info from sysrq if it happens again.
> 
> Is there any mount option I can use to disable delayed allocation or something
> to try to work around the problem?

You can mount with -o nodelalloc, though there is no reason to think that this
is related to the problem at this point ... it may be more productive to test a
newer kernel.


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