QA output created by 665
ERROR: unable to open /dev/mapper/vg0-lv9: Device or resource busy
./common/rc: line 122: 2369644 Killed                  $MOUNT_PROG '_mount_ops_filter $*'
mount /dev/mapper/vg0-lv9 /mnt/scratch failed
(see /xfstests-dev/results//btrfs_normal_noholes/generic/665.full for details)