Commit 812c5945 authored by Waiman Long's avatar Waiman Long Committed by Tejun Heo
Browse files

cgroup/cpuset: Add test_cpuset_v1_hp.sh 



Add a simple test to verify that an empty v1 cpuset will force its tasks
to be moved to an ancestor node. It is based on the test case documented
in commit 76bb5ab8 ("cpuset: break kernfs active protection in
cpuset_write_resmask()").

Signed-off-by: default avatarWaiman Long <longman@redhat.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 2125c003

tools/testing/selftests/cgroup/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -4,7 +4,7 @@ CFLAGS += -Wall -pthread 
all: ${HELPER_PROGS}



TEST_FILES     := with_stress.sh

TEST_PROGS     := test_stress.sh test_cpuset_prs.sh

TEST_PROGS     := test_stress.sh test_cpuset_prs.sh test_cpuset_v1_hp.sh

TEST_GEN_FILES := wait_inotify

TEST_GEN_PROGS = test_memcontrol

TEST_GEN_PROGS += test_kmem

tools/testing/selftests/cgroup/test_cpuset_v1_hp.sh

0 → 100755
+46 −0
Original line number Diff line number Diff line 
#!/bin/sh

# SPDX-License-Identifier: GPL-2.0

#

# Test the special cpuset v1 hotplug case where a cpuset become empty of

# CPUs will force migration of tasks out to an ancestor.

#



skip_test() {

	echo "$1"

	echo "Test SKIPPED"

	exit 4 # ksft_skip

}



[[ $(id -u) -eq 0 ]] || skip_test "Test must be run as root!"



# Find cpuset v1 mount point

CPUSET=$(mount -t cgroup | grep cpuset | head -1 | awk -e '{print $3}')

[[ -n "$CPUSET" ]] || skip_test "cpuset v1 mount point not found!"



#

# Create a test cpuset, put a CPU and a task there and offline that CPU

#

TDIR=test$$

[[ -d $CPUSET/$TDIR ]] || mkdir $CPUSET/$TDIR

echo 1 > $CPUSET/$TDIR/cpuset.cpus

echo 0 > $CPUSET/$TDIR/cpuset.mems

sleep 10&

TASK=$!

echo $TASK > $CPUSET/$TDIR/tasks

NEWCS=$(cat /proc/$TASK/cpuset)

[[ $NEWCS != "/$TDIR" ]] && {

	echo "Unexpected cpuset $NEWCS, test FAILED!"

	exit 1

}



echo 0 > /sys/devices/system/cpu/cpu1/online

sleep 0.5

echo 1 > /sys/devices/system/cpu/cpu1/online

NEWCS=$(cat /proc/$TASK/cpuset)

rmdir $CPUSET/$TDIR

[[ $NEWCS != "/" ]] && {

	echo "cpuset $NEWCS, test FAILED!"

	exit 1

}

echo "Test PASSED"

exit 0