linux-kernel - Re: Apparent serious progressive ext4 data corruption bug in 3.6.3 (and other stable branches?)

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Message-ID: <20121027175534.GA7783@thunk.org>
Date:	Sat, 27 Oct 2012 13:55:34 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Nix <nix@...eri.org.uk>
Cc:	Eric Sandeen <sandeen@...hat.com>, linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org
Subject: Re: Apparent serious progressive ext4 data corruption bug in 3.6.3
 (and other stable branches?)

On Sat, Oct 27, 2012 at 01:45:25PM +0100, Nix wrote:
> Ah! it's turned on by journal_async_commit. OK, that alone argues
> against use of journal_async_commit, tested or not, and I'd not have
> turned it on if I'd noticed that.
> 
> (So, the combinations I'll be trying for effect on this bug are:
> 
>  journal_async_commit (as now)
>  journal_checksum
>  none

Can you also check and see whether the presence or absence of
"nobarrier" makes a difference?

Thanks,

						- Ted
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