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[Xen-devel] Re: [GIT PULL] xen blkfront barrier updates

To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: [Xen-devel] Re: [GIT PULL] xen blkfront barrier updates
From: Jens Axboe <axboe@xxxxxxxxx>
Date: Fri, 12 Nov 2010 08:45:56 +0100
Cc: Daniel Stodden <daniel.stodden@xxxxxxxxxx>, "\"Xen-devel@xxxxxxxxxxxxxxxxxxx\" li" <Xen-devel@xxxxxxxxxxxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Christoph Hellwig <hch@xxxxxx>
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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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