For rcutorture tests that support fqs operations and set fqs_duration greater than zero, the fqs_task kthread will be created. but if the fqs_holdoff is not set, the default value is zero, this cause fqs_task enter a long-term busy loop and won't voluntarily give up the CPU until stopped by kthread_stop(). this commit therefore add for fqs_holdoff check before the fqs_task is created, make sure the fqs_task is created when the fqs_holdoff is also greater than zero.
Signed-off-by: Zqiang <[email protected]> --- kernel/rcu/rcutorture.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 83999e57b3ea..9f0e6c1cad44 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -3886,7 +3886,9 @@ rcu_torture_init(void) } if (fqs_duration < 0) fqs_duration = 0; - if (fqs_duration) { + if (fqs_holdoff < 0) + fqs_holdoff = 0; + if (fqs_duration && fqs_holdoff) { /* Create the fqs thread */ firsterr = torture_create_kthread(rcu_torture_fqs, NULL, fqs_task); -- 2.17.1
