Am 05.12.2016 um 16:49 hat Eric Blake geschrieben: > The qcow2_make_empty() function is reached during 'qemu-img commit', > in order to clear out ALL clusters of an image. However, if the > image cannot use the fast code path (true if the image is format > 0.10, or if the image contains a snapshot), the cluster size is > larger than 512, and the image is larger than 2G in size, then our > choice of sector_step causes problems. Since it is not cluster > aligned, but qcow2_discard_clusters() silently ignores an unaligned > head or tail, we are leaving clusters allocated. > > Enhance the testsuite to expose the flaw, and patch the problem by > ensuring our step size is aligned. > > Signed-off-by: Eric Blake <ebl...@redhat.com>
Thanks, applied to the block branch. Kevin
