Eric Blake <ebl...@redhat.com> writes: > QEMU's attempts to learn whether a destination file starts life with > all zero contents are just a heuristic. There may be cases where the > caller is aware of information that QEMU cannot learn quickly, in > which case telling QEMU what to assume about the destination can make > the mirror operation faster. Given our existing example of "qemu-img > convert --target-is-zero", it is time to expose this override in QMP > for blockdev-mirror as well. > > Signed-off-by: Eric Blake <ebl...@redhat.com>
Acked-by: Markus Armbruster <arm...@redhat.com>
