On Wed, Apr 04, 2018 at 10:37:26AM -0400, Waiman Long wrote: > The commit 8c5db92a705d ("locking/rwsem: Add DEBUG_RWSEMS to look for > lock/unlock mismatches") causes a warning in ext4 fstests due to the > fact that the freeze and thaw ioctls, by design, are run in different > processes. While true, it's not just ext4 fstests --- it's any file system which supports freeze/thaw, since it's happening in the vfs layer. I have just as easily replicated the problem using "kvm-xfstests -c xfs generic/068". Or "kvm-xfstests -c btrfs generic/068". Cheers, - Ted