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Re: [Qemu-devel] [PULL 0/2] xen_disk: use NATIVE_AIO and NOCACHE
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From: |
Stefano Stabellini |
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Subject: |
Re: [Qemu-devel] [PULL 0/2] xen_disk: use NATIVE_AIO and NOCACHE |
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Date: |
Tue, 27 Mar 2012 17:20:09 +0100 |
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User-agent: |
Alpine 2.00 (DEB 1167 2008-08-23) |
On Tue, 27 Mar 2012, Christoph Hellwig wrote:
> 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.
Yeah, that's a good suggestion, it shouldn't be hard either.