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 <[email protected]> --- 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
