When the rcutorture tests start to exit, the rcu_torture_cleanup() is
invoked to stop kthreads and release resources, if the stall-task
kthreads exist, cpu-stall has started and the rcutorture.stall_cpu
is set to a larger value, the rcu_torture_cleanup() will be blocked
for a long time and the hung-task may occur, this commit therefore
add kthread_should_stop() to the loop of cpu-stall operation, when
rcutorture tests ends, no need to wait for cpu-stall to end, exit
directly.
Signed-off-by: Zqiang <qiang.zhang1211@xxxxxxxxx>
---
kernel/rcu/rcutorture.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 3f9c3766f52b..6a3cd6ed8b25 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -2490,7 +2490,7 @@ static int rcu_torture_stall(void *args)
pr_alert("%s start on CPU %d.\n",
__func__, raw_smp_processor_id());
while (ULONG_CMP_LT((unsigned long)ktime_get_seconds(),
- stop_at))
+ stop_at) && !kthread_should_stop())
if (stall_cpu_block) {
#ifdef CONFIG_PREEMPTION
preempt_schedule();
--
2.17.1
