068: run fsstress in read/write mode

Jan Kara was testing filesystem freeze, and was consistently locking
up, although my tests of 068 were passing.  He pointed out that
he was running in read/write mode, and it was atime updates causing
the trouble.  Sure enough, dropping "-w" from fsstress locked me up
too.  Change this so we get better (and more realistic) coverage.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
cc: Jan Kara <jack@suse.cz>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

068

@@ -79,8 +79,9 @@ touch $tmp.running
     nops=200
     while [ -f "$tmp.running" ]
       do
-      #	-w ensures that the only ops are ones which cause write I/O
-      $FSSTRESS_PROG -d $STRESS_DIR -w -p $procs -n $nops $FSSTRESS_AVOID \
+      # We do both read & write IO - not only is this more realistic,
+      # but it also potentially tests atime updates
+      $FSSTRESS_PROG -d $STRESS_DIR -p $procs -n $nops $FSSTRESS_AVOID \
 	  > /dev/null 2>&1
     done