Jan,
Thanks for the patch it has been committed.
--Rich
commit e47ebda011f69fab2c9f3090f50f1cfb9353f7e7
Author: Jan Schmidt <list.btrfs at jan-o-sch.net>
Date: Thu May 9 14:40:00 2013 -0500
xfstests: add execution of a custom command to fsstress (-x and -X
options)