Re: [PATCH] locking/rwsem: Add up_write_non_owner() for percpu_up_write()

[Theodore Y. Ts'o]

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