linux-kernel - Re: [PATCH 2/5] ext3: call blkdev_issue

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Date:	Mon, 30 Mar 2009 21:04:05 +0900
From:	Fernando Luis Vázquez Cao 
	<fernando@....ntt.co.jp>
To:	Jeff Garzik <jeff@...zik.org>
CC:	Christoph Hellwig <hch@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Theodore Tso <tytso@....edu>, Ingo Molnar <mingo@...e.hu>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Arjan van de Ven <arjan@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Nick Piggin <npiggin@...e.de>, David Rees <drees76@...il.com>,
	Jesper Krogh <jesper@...gh.cc>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	chris.mason@...cle.com, david@...morbit.com, tj@...nel.org
Subject: Re: [PATCH 2/5] ext3: call blkdev_issue_flush on fsync()

Fernando Luis Vázquez Cao wrote:
> Jeff Garzik wrote:
>> Fernando Luis Vázquez Cao wrote:
>>> To ensure that bits are truly on-disk after an fsync or fdatasync, we
>>> should force a disk flush explicitly when there is dirty data/metadata
>>> and the journal didn't emit a write barrier (either because metadata is
>>> not being synched or barriers are disabled).
>>>
>>> Signed-off-by: Fernando Luis Vazquez Cao <fernando@....ntt.co.jp>
>>
>> Your patches do not seem to propagate the issue-flush error code, even 
>> when it is easily available.
> 
> Oops... you are right. I will fix that.

I reflected your comments in the new version of the patch set.While at 
it I also modified the respective reiserfs and xfs fsync functions so 
that, at least to some extent,they propagate the issue-flush error code.

I'll be replying to this email with the new patches.

Thanks,

Fernando
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