linux-ext4 - Re: data corruption with ext4 (from 2.6.27.4) exposed by rtorrent

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Message-ID: <20081105204223.GC9266@mit.edu>
Date:	Wed, 5 Nov 2008 15:42:23 -0500
From:	Theodore Tso <tytso@....edu>
To:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Cc:	Solofo.Ramangalahy@...l.net,
	Jindrich Makovicka <makovick@...il.com>,
	linux-ext4@...r.kernel.org
Subject: Re: data corruption with ext4 (from 2.6.27.4) exposed by rtorrent

On Wed, Nov 05, 2008 at 09:21:00PM +0100, Solofo.Ramangalahy@...l.net wrote:
> Solofo.Ramangalahy@...l.net writes:
>  >  > The next question is whether the problem is more easily triggerred
>  >  > when under memory pressure.
>  > 
>  > I was currently testing other kernels, but, right, I will retest with more memory.
> 
> with -m 2048 I do not observe the problem.
> 
> I should add that with 2.6.28-rc3 + ext4 patch queue, I am observing
> what seems to be lockdep bug:
> [   31.603020] BUG: key c9f315a8 not in .data!

Aneesh has some new patches in the ext4 patch queue that add new
lockdep annotations.  I'm guessing there's a problem there.  Aneesh,
can you look into this?  Solofo, can you send the .config you used
in case it was unique to replicating the problem?

						- Ted
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