On 09/17/2013 07:48 AM, Peter Lieven wrote: > Signed-off-by: Peter Lieven <p...@kamp.de> > --- > block-migration.c | 3 ++- > block.c | 4 ++++ > block/backup.c | 2 +- > include/block/block.h | 7 +++++++ > 4 files changed, 14 insertions(+), 2 deletions(-)
> +++ b/include/block/block.h
> @@ -65,6 +65,13 @@ typedef struct BlockDevOps {
> typedef enum {
> BDRV_REQ_COPY_ON_READ = 0x1,
> BDRV_REQ_ZERO_WRITE = 0x2,
> + /* the BDRV_REQ_MAY_UNMAP flag is used to indicate that block driver
Minor grammar improvements:
s/the/The/
s/that/that the/
> + * is allowed to optimize a write zeroes request by unmapping
> (discarding)
> + * blocks if it is guaranteed that the result will read back as
> + * zeroes. the flag is only passed to the driver if the block device is
s/the flag/The flag/
> + * opened with BDRV_O_UNMAP.
> + */
> + BDRV_REQ_MAY_UNMAP = 0x4,
As those are trivial, feel free to add:
Reviewed-by: Eric Blake <ebl...@redhat.com>
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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