[LTP] [PATCH] controllers/cpuset: Restore the value of cpuset.sched_load_balance

[Wang Xin]

When we run the cpuhotplug03 test case on the arm64 machine,
we conclude that no error occurs when the cpuhotplug03 case is executed alone,
but once the cpuset_sched_domains case is executed first,
After cpuhotplug03 is executed, the error "cpuhotplug03 1 TFAIL: No cpuhotplug_do_spin_loop processes found on" occurs.
The cpuset_sched_domains test case changes the value of cpuset.sched_load_balance in the cpuset cgroup subsystem,
but does not restore the value at the end of the test.
Modify the cpuset_funcs.sh file. The test result shows that the problem is solved successfully.

Signed-off-by: Wang Xin <wangxin410@huawei.com>
---
 testcases/kernel/controllers/cpuset/cpuset_funcs.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/testcases/kernel/controllers/cpuset/cpuset_funcs.sh b/testcases/kernel/controllers/cpuset/cpuset_funcs.sh
index 00aad0e..820de33 100755
--- a/testcases/kernel/controllers/cpuset/cpuset_funcs.sh
+++ b/testcases/kernel/controllers/cpuset/cpuset_funcs.sh
@@ -59,6 +59,8 @@ CPUSET="/dev/cpuset"
 CPUSET_TMP="/tmp/cpuset_tmp"
 CLONE_CHILDREN="/dev/cpuset/cgroup.clone_children"
 CHILDREN_VALUE="0"
+SCHED_LB="/dev/cpuset/cpuset.sched_load_balance"
+SCHED_LB_VALUE="0"
 HOTPLUG_CPU="1"
 cpuset_log()
@@ -169,6 +171,7 @@ setup()
 	fi
 	CHILDREN_VALUE="`cat $CLONE_CHILDREN`"
+	SCHED_LB_VALUE="`cat $SCHED_LB`"
 }
 # Write the cleanup function
@@ -180,6 +183,7 @@ cleanup()
 	}
 	echo $CHILDREN_VALUE > $CLONE_CHILDREN
+	echo $SCHED_LB_VALUE > $SCHED_LB
 	find "$CPUSET" -type d | sort | sed -n '2,$p' | tac | while read subdir
	do
2.6.2