linux-kernel - Re: [RFD] BIO_RW_BARRIER - what it means for devices, filesystems, and dm/md.

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Message-ID: <20070529064559.GB531679@sgi.com>
Date:	Mon, 28 May 2007 23:45:59 -0700
From:	Jeremy Higdon <jeremy@....com>
To:	Timothy Shimmin <tes@....com>
Cc:	David Chinner <dgc@....com>, Neil Brown <neilb@...e.de>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	dm-devel@...hat.com, linux-raid@...r.kernel.org,
	Jens Axboe <jens.axboe@...cle.com>,
	Phillip Susi <psusi@....rr.com>,
	Stefan Bader <Stefan.Bader@...ibm.com>,
	Andreas Dilger <adilger@...sterfs.com>,
	Tejun Heo <htejun@...il.com>
Subject: Re: [RFD] BIO_RW_BARRIER - what it means for devices, filesystems, and dm/md.

On Mon, May 28, 2007 at 02:48:45PM +1000, Timothy Shimmin wrote:
> I'm taking it that the FUA write will just guarantee that that
> particular write has made it to disk on i/o completion
> (and no write cache flush is done).

Correct.  It only applies to that one write command.

jeremy
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