On Thu 26 Apr 2018 04:51:28 AM CEST, Eric Blake wrote: > If you have a capable file system (tmpfs is good, ext4 not so much; > run ./check with TEST_DIR pointing to a good location so as not > to skip the test), it's actually possible to create a qcow2 file > that expands to a sparse 512T image with just over 38M of content. > The test is not the world's fastest (qemu crawling through 256M > bits of refcount table to find the next cluster to allocate takes > several seconds, as does qemu-img check reporting millions of > leaked clusters); but it DOES catch the problem that the previous > patch just fixed where writing a compressed cluster to a full > image ended up overwriting the wrong cluster. > > Suggested-by: Max Reitz <mre...@redhat.com> > Signed-off-by: Eric Blake <ebl...@redhat.com>
Nice test :-) Reviewed-by: Alberto Garcia <be...@igalia.com> Berto
