Commit-ID: 750db0f5f7d0ff6b86158015f02c275702639b20
Gitweb: http://git.kernel.org/tip/750db0f5f7d0ff6b86158015f02c275702639b20
Author: Boqun Feng <boqun.feng@xxxxxxxxx>
AuthorDate: Mon, 2 May 2016 10:30:00 +0800
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Tue, 14 Jun 2016 16:03:28 -0700
torture: Stop onoff task if there is only one cpu
If the whole system has only one cpu, that cpu won't be able to be
offlined, so there is no need onoff task is stil running.
Signed-off-by: Boqun Feng <boqun.feng@xxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
kernel/torture.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/kernel/torture.c b/kernel/torture.c
index fb39a06..75961b3 100644
--- a/kernel/torture.c
+++ b/kernel/torture.c
@@ -194,6 +194,12 @@ torture_onoff(void *arg)
for_each_online_cpu(cpu)
maxcpu = cpu;
WARN_ON(maxcpu < 0);
+
+ if (maxcpu == 0) {
+ VERBOSE_TOROUT_STRING("Only one CPU, so CPU-hotplug testing is disabled");
+ goto stop;
+ }
+
if (onoff_holdoff > 0) {
VERBOSE_TOROUT_STRING("torture_onoff begin holdoff");
schedule_timeout_interruptible(onoff_holdoff);
@@ -209,6 +215,8 @@ torture_onoff(void *arg)
&sum_online, &min_online, &max_online);
schedule_timeout_interruptible(onoff_interval);
}
+
+stop:
torture_kthread_stopping("torture_onoff");
return 0;
}
--
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