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(parent: 3e890c7) | patch
qcow2: Set zero flag for discarded clusters
authorKevin Wolf <kwolf@redhat.com>
Sat, 8 Feb 2014 13:38:33 +0000 (14:38 +0100)
committerKevin Wolf <kwolf@redhat.com>
Fri, 21 Feb 2014 20:02:21 +0000 (21:02 +0100)
commita71835a0ccff168b19ffc9656fe27988821ec59a
tree9d328538c78f9be36db90eb4dff9c8d4b3de2e77tree | snapshot
parent3e890c77cf038d8c2de66ed7996fe77a6f94787ccommit | diff
qcow2: Set zero flag for discarded clusters

Instead of making the backing file contents visible again after a discard
request, set the zero flag if possible (i.e. on version >= 3).

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
block/qcow2-cluster.c diff | blob | history
tests/qemu-iotests/046 diff | blob | history
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