On 28.06.20 13:02, Alberto Garcia wrote: > The L2 bitmap needs to be updated after each write to indicate what > new subclusters are now allocated. This needs to happen even if the > cluster was already allocated and the L2 entry was otherwise valid. > > In some cases however a write operation doesn't need change the L2 > bitmap (because all affected subclusters were already allocated). This > is detected in calculate_l2_meta(), and qcow2_alloc_cluster_link_l2() > is never called in those cases. > > Signed-off-by: Alberto Garcia > Reviewed-by: Eric Blake > --- > block/qcow2-cluster.c | 18 ++++++++++++++++++ > 1 file changed, 18 insertions(+) Reviewed-by: Max Reitz