Re: [Qemu-devel] [PATCH v4] mirror: Rewrite mirror_iteration

2015-11-16 Thread Fam Zheng
On Mon, 11/16 20:32, Max Reitz wrote: > On 12.11.2015 04:44, Fam Zheng wrote: > > The "pnum < nb_sectors" condition in deciding whether to actually copy > > data is unnecessarily strict, and the qiov initialization is > > unnecessarily for bdrv_aio_write_zeroes and bdrv_aio_discard. > > > > Rewrit

Re: [Qemu-devel] [PATCH v4] mirror: Rewrite mirror_iteration

2015-11-16 Thread Max Reitz
On 12.11.2015 04:44, Fam Zheng wrote: > The "pnum < nb_sectors" condition in deciding whether to actually copy > data is unnecessarily strict, and the qiov initialization is > unnecessarily for bdrv_aio_write_zeroes and bdrv_aio_discard. > > Rewrite mirror_iteration to fix both flaws. > > Signed-

[Qemu-devel] [PATCH v4] mirror: Rewrite mirror_iteration

2015-11-11 Thread Fam Zheng
The "pnum < nb_sectors" condition in deciding whether to actually copy data is unnecessarily strict, and the qiov initialization is unnecessarily for bdrv_aio_write_zeroes and bdrv_aio_discard. Rewrite mirror_iteration to fix both flaws. Signed-off-by: Fam Zheng --- block/mirror.c | 198 +++