[Sheepdog] [QEMU PATCH] sheepdog: add cache flush support
hch at infradead.org
Wed Nov 16 09:12:39 CET 2011
On Wed, Nov 16, 2011 at 02:07:07PM +0900, MORITA Kazutaka wrote:
> At Tue, 15 Nov 2011 17:06:52 -0500,
> Christoph Hellwig wrote:
> > This patch implement support for writeback-style cache in the sheepdog
> > protocol. The SD_OP_FLUSH_VDI command will flush all data for the
> > referenced VDI to stable storage.
> > XXX: we'll need to figure out if the sheep server actually support this
> > command somehow.
> If we increment SD_PROTO_VER, the sheep daemon should return
> SD_RES_VER_MISMATCH error when opening the VDI.
And then revert to trying the old protocol revision if it fails? Sounds
like that would be worth a try.
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