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Date: Tue, 27 Mar 2012 18:11:23 +0200
From: Christoph Hellwig <hch@lst.de>
Message-ID: <20120327161123.GA32116@lst.de>
References: <alpine.DEB.2.00.1203271645570.15151@kaball-desktop>
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Subject: Re: [Qemu-devel] [PULL 0/2] xen_disk: use NATIVE_AIO and NOCACHE
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To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: aliguori@us.ibm.com, qemu-stable@nongnu.org, Anthony Liguori <anthony@codemonkey.ws>, qemu-devel@nongnu.org

On Tue, Mar 27, 2012 at 04:48:19PM +0100, Stefano Stabellini wrote:
> Anthony,
> please pull this small patch series that allows xen_disk to be used
> correctly with NATIVE_AIO and O_DIRECT.
> 
> This series should be backported to the stable branch too.

Any plans to add BLKIF_OP_FLUSH_DISKCACHE support to xen_disk?  Unlike
the old bnroken Xen barrier scheme this actually implements pure flushes
for fdatasync or blockdevice O_SYNC I/O corectly, and for modern Linux
kernels it actually will be quite a bit faster, too.