repquota -u -g $SCRATCH_MNT | grep -v "^root" | _filter_scratch
+# XXX This is a nasty hack. remount doesn't work on a fileystem
+# with a context; see https://bugzilla.redhat.com/show_bug.cgi?id=563267
+#
+# We work around it by editing the context out of mtab. Sigh.
+sed -i "s#^$SCRATCH_DEV\(.*\),context=\"system_u:object_r:nfs_t:s0\"#$SCRATCH_DEV\1#" /etc/mtab
mount -o remount,ro $SCRATCH_DEV 2>&1 | tee -a $seq.full | _filter_scratch
touch $SCRATCH_MNT/failed 2>&1 | tee -a $seq.full | _filter_scratch
mount -o remount,rw $SCRATCH_DEV 2>&1 | tee -a $seq.full | _filter_scratch
-$XFS_IO_PROG -F -c 'pwrite 0 16k' -c 'fsync' \
+$XFS_IO_PROG -F -c 'pwrite 0 8k' -c 'fsync' \
$SCRATCH_MNT/testfile >>$seq.full 2>&1
repquota -u -g $SCRATCH_MNT | grep -v "^root" | _filter_scratch