diff options
| -rw-r--r-- | block/qcow2-cluster.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index fb91fd8979..31077d8102 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -1511,7 +1511,8 @@ static int discard_single_l2(BlockDriverState *bs, uint64_t offset, break; case QCOW2_CLUSTER_ZERO: - if (!full_discard) { + /* Preallocated zero clusters should be discarded in any case */ + if (!full_discard && (old_l2_entry & L2E_OFFSET_MASK) == 0) { continue; } break; |