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Date: Tue, 9 Nov 2010 15:20:33 -0500
From: Christoph Hellwig <hch@infradead.org>
To: Evgeniy Ivanov <lolkaantimat@gmail.com>
Cc: Jesper Juhl <jj@chaosbits.net>, Dave Chinner <david@fromorbit.com>,
        Chris Mason <chris.mason@oracle.com>, Ingo Molnar <mingo@elte.hu>,
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        Corrado Zoccolo <czoccolo@gmail.com>,
        Shaohua Li <shaohua.li@intel.com>, Sanjoy Mahajan <sanjoy@olin.edu>,
        Steven Barrett <damentz@gmail.com>
Subject: Re: 2.6.36 io bring the system to its knees
Message-ID: <20101109202033.GA17122@infradead.org>
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> I'm not sure if "data=writeback" (makes ext4 journaling similar to
> XFS) really fixes the problem

It doesn't.  XFS does not expose stale data after a crash, while ext3/4
data=writeback does.

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