QA output created by 475
Silence is golden.
./common/dmerror: line 29: 2347262 Killed                  $MOUNT_PROG -t $FSTYP '_common_dev_mount_options $*' $SCRATCH_OPTIONS $DMERROR_DEV $SCRATCH_MNT
mount failed
(see /xfstests-dev/results//btrfs_normal_noholes/generic/475.full for details)
umount: /mnt/scratch: not mounted.