linux-kernel - Re: [GIT PULL] xen blkfront barrier updates

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Date:	Fri, 12 Nov 2010 08:45:56 +0100
From:	Jens Axboe <axboe@...nel.dk>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
CC:	"\"Xen-devel@...ts.xensource.com\" li" 
	<Xen-devel@...ts.xensource.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@....de>,
	Daniel Stodden <daniel.stodden@...rix.com>
Subject: Re: [GIT PULL] xen blkfront barrier updates

On 2010-11-12 00:20, Jeremy Fitzhardinge wrote:
> Hi Jens,
> 
> Here's the xen-blkfront barrier changes we discussed in Boston (its
> identical to the last posted version).
> 
> The only comment was Christoph pointing out EOPNOTSUPP is not used in
> the block interface, but blkfront is just using it as a local
> placeholder and it never gets returned up to the block layer.
> 
> I still haven't sorted out what's going on with the backends; we
> definitely need either a FLUSH operation or make empty WRITE_BARRIER
> work to flush disk caches.

Thanks Jeremy, I'll pull this in.

-- 
Jens Axboe

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