| commit | dcfb3beb5130694b76b57de109619fcbf9c7e5b5 | |
| author | Fam Zheng <famz@redhat.com> | |
| Mon, 8 Jun 2015 05:56:09 +0000 (8 13:56 +0800) | ||
| committer | Stefan Hajnoczi <stefanha@redhat.com> | |
| Thu, 2 Jul 2015 09:06:23 +0000 (2 10:06 +0100) | ||
| tree | af8a045ab17230ead191ffba9886025c6b12a35e | treesnapshot (tar.gz zip) |
| parent | 0fc9f8ea2800b76eaea20a8a3a91fbeeb4bfa81b | commitdiff |
mirror: Do zero write on target if sectors not allocated
If guest discards a source cluster, mirroring with bdrv_aio_readv is overkill.
Some protocols do zero upon discard, where it's best to use
bdrv_aio_write_zeroes, otherwise, bdrv_aio_discard will be enough.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
If guest discards a source cluster, mirroring with bdrv_aio_readv is overkill.
Some protocols do zero upon discard, where it's best to use
bdrv_aio_write_zeroes, otherwise, bdrv_aio_discard will be enough.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
| block/mirror.c | diffblobblamehistory |