From 0c8fa15e224d29193ec7828f7ddbbd343993f562 Mon Sep 17 00:00:00 2001 From: Zhao Gongyi Date: Mon, 5 Sep 2022 21:36:14 +0800 Subject: [PATCH] selftests/cpu-hotplug: Reserve one cpu online at least [ Upstream commit 51d4c851465c32143d9c7b1cfb46fc581922b116 ] Considering that we can not offline all cpus in any cases, we need to reserve one cpu online when the test offline all hotpluggable online cpus, otherwise the test will fail forever. Fixes: d89dffa976bc ("fault-injection: add selftests for cpu and memory hotplug") Signed-off-by: Zhao Gongyi Signed-off-by: Shuah Khan Signed-off-by: Sasha Levin --- .../selftests/cpu-hotplug/cpu-on-off-test.sh | 40 ++++++++++--------- 1 file changed, 22 insertions(+), 18 deletions(-) diff --git a/tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh b/tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh index 32ec7e4489ee..4c1d6d9abecc 100755 --- a/tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh +++ b/tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh @@ -149,6 +149,25 @@ offline_cpu_expect_fail() fi } +online_all_hot_pluggable_cpus() +{ + for cpu in `hotplaggable_offline_cpus`; do + online_cpu_expect_success $cpu + done +} + +offline_all_hot_pluggable_cpus() +{ + local reserve_cpu=$online_max + for cpu in `hotpluggable_online_cpus`; do + # Reserve one cpu oneline at least. + if [ $cpu -eq $reserve_cpu ];then + continue + fi + offline_cpu_expect_success $cpu + done +} + allcpus=0 online_cpus=0 online_max=0 @@ -197,25 +216,10 @@ else echo -e "\t online all offline cpus" fi -# -# Online all hot-pluggable CPUs -# -for cpu in `hotplaggable_offline_cpus`; do - online_cpu_expect_success $cpu -done +online_all_hot_pluggable_cpus -# -# Offline all hot-pluggable CPUs -# -for cpu in `hotpluggable_online_cpus`; do - offline_cpu_expect_success $cpu -done +offline_all_hot_pluggable_cpus -# -# Online all hot-pluggable CPUs again -# -for cpu in `hotplaggable_offline_cpus`; do - online_cpu_expect_success $cpu -done +online_all_hot_pluggable_cpus exit $retval