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Re: [Qemu-devel] [PULL 0/2] xen_disk: use NATIVE_AIO and NOCACHE
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From: |
Christoph Hellwig |
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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 18:11:23 +0200 |
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User-agent: |
Mutt/1.5.17 (2007-11-01) |
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.