Re: [Qemu-devel] [PATCH 0/3] qed: Add support for zero clusters

[Kevin Wolf <kwolf@redhat.com>]

Am 17.12.2010 16:58, schrieb Stefan Hajnoczi:
> This patch series adds zero data clusters to QED.  Clusters can be marked as
> zero clusters to store zeroed regions in a space-efficient way.  The patch
> never actually creates new zero clusters but includes the I/O path support code
> to handle them if they are used by an image file.
> 
> Image streaming and copy-on-read take advantage of zero data clusters to avoid
> expanding out zeroes from the backing file.  Those features are separate
> patches that will come later but I'm presenting this patch now so we can get
> this core QED image format feature in before doing the first QEMU release
> containing QED.
> 
> The first patch fixes up an issue with the QED merge where '^' characters were
> dropped from the QED specification.
> 
> The last two patches document and implement zero clusters, which were
> originally implemented by Anthony Liguori <aliguori@us.ibm.com>.

Thanks, applied all to the block branch.

Kevin