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由 Fam Zheng 提交于
This checks that the discard on mirror source that effectively zeroes data is also reflected by the data of target. Signed-off-by: NFam Zheng <famz@redhat.com> Reviewed-by: NJohn Snow <jsnow@redhat.com> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
c6150917