linux-ext4 - Re: [PATCH 1/5] jbd: strictly check for write errors on data buffers

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Message-ID: <4846743C.5060400@hitachi.com>
Date:	Wed, 04 Jun 2008 19:53:48 +0900
From:	Hidehiro Kawai <hidehiro.kawai.ez@...achi.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	sct@...hat.com, adilger@...sterfs.com,
	linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org,
	jack@...e.cz, jbacik@...hat.com, cmm@...ibm.com, tytso@....edu,
	yumiko.sugita.yf@...achi.com, satoshi.oshima.fk@...achi.com
Subject: Re: [PATCH 1/5] jbd: strictly check for write errors on data buffers

Hi,

Andrew Morton wrote:

> On Mon, 02 Jun 2008 19:43:57 +0900
> Hidehiro Kawai <hidehiro.kawai.ez@...achi.com> wrote:
> 
>>In ordered mode, we should abort journaling when an I/O error has
>>occurred on a file data buffer in the committing transaction.
> 
> Why should we do that?

Aborting the journal leads the filesystem to read-only state, and it
can prevent inconsistent state in file data from diffusing furthermore. 
I think it makes sense for ordered mode users; they don't want to
lose file updates as much as possible, but they don't want to do fsync.

Thanks,
-- 
Hidehiro Kawai
Hitachi, Systems Development Laboratory
Linux Technology Center

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