diff --git a/case-lru-file-readtwice b/case-lru-file-readtwice
index 85533b248634..57cb97d121ae 100755
--- a/case-lru-file-readtwice
+++ b/case-lru-file-readtwice
@@ -15,23 +15,30 @@
 
 . ./hw_vars
 
-for i in `seq 1 $nr_task`
-do
-	create_sparse_file $SPARSE_FILE-$i $((ROTATE_BYTES / nr_task))
-	timeout --foreground -s INT ${runtime:-600} dd bs=4k if=$SPARSE_FILE-$i of=/dev/null > $TMPFS_MNT/dd-output-1-$i 2>&1 &
-	timeout --foreground -s INT ${runtime:-600} dd bs=4k if=$SPARSE_FILE-$i of=/dev/null > $TMPFS_MNT/dd-output-2-$i 2>&1 &
-done
+OUT_DIR=$(hostname)-${nr_task}c-$(((mem + (1<<29))>>30))g
+TEST_CASES=${@:-$(echo case-*)}
+
+echo $((1<<30)) > /proc/sys/vm/max_map_count
+echo $((1<<20)) > /proc/sys/kernel/threads-max
+echo 1 > /proc/sys/vm/overcommit_memory
+#echo 3 > /proc/sys/vm/drop_caches
+
+
+i=1
+
+if [ "$1" == "m" ];then
+	mount_tmpfs
+	create_sparse_root
+	create_sparse_file $SPARSE_FILE-$i $((ROTATE_BYTES))
+	exit
+fi
+
+
+if [ "$1" == "r" ];then
+	(timeout --foreground -s INT ${runtime:-300} dd bs=4k if=$SPARSE_FILE-$i of=/dev/null > $TMPFS_MNT/dd-output-1-$i 2>&1)&
+	(timeout --foreground -s INT ${runtime:-300} dd bs=4k if=$SPARSE_FILE-$i of=/dev/null > $TMPFS_MNT/dd-output-2-$i 2>&1)&
+fi
 
 wait
 sleep 1
 
-for file in $TMPFS_MNT/dd-output-*
-do
-	[ -s "$file" ] || {
-		echo "dd output file empty: $file" >&2
-	}
-	cat $file
-	rm  $file
-done
-
-rm `seq -f $SPARSE_FILE-%g 1 $nr_task`
diff --git a/hw_vars b/hw_vars
index 8731cefb9f57..ceeaa9f17c0b 100755
--- a/hw_vars
+++ b/hw_vars
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/sh -ex
 
 if [ -n "$runtime" ]; then
 	USEMEM="$CMD ./usemem --runtime $runtime"
@@ -43,7 +43,7 @@ create_loop_devices()
 	modprobe loop 2>/dev/null
 	[ -e "/dev/loop0" ] || modprobe loop 2>/dev/null
 
-	for i in $(seq 0 8)
+	for i in $(seq 0 104)
 	do
 		[ -e "/dev/loop$i" ] && continue
 		mknod /dev/loop$i b 7 $i
@@ -101,11 +101,11 @@ remove_sparse_root () {
 create_sparse_file () {
 	name=$1
 	size=$2
-	# echo "$name is of size $size"
+	echo "$name is of size $size"
 	$CMD truncate $name -s $size
 	# dd if=/dev/zero of=$name bs=1k count=1 seek=$((size >> 10)) 2>/dev/null
-	# ls $SPARSE_ROOT
-	# ls /tmp/vm-scalability/*
+	ls $SPARSE_ROOT
+	ls /tmp/vm-scalability/*
 }