From 02b51a1cf47977d8772c7dcc363ef6a1e6e59f21 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 17 Dec 2021 15:05:05 -0800 Subject: rcutorture: Add end-of-test check to rcu_torture_fwd_prog() loop The second and subsequent forward-progress kthreads loop waiting for the first forward-progress kthread to start the next test interval. Unfortunately, if the test ends while one of those kthreads is waiting, the test will hang. This hang occurs because that wait loop fails to check for the end of the test. This commit therefore adds an end-of-test check to that wait loop. Signed-off-by: Paul E. McKenney --- kernel/rcu/rcutorture.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/rcu') diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index afe95c694895..e99658efd97f 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -2515,7 +2515,7 @@ static int rcu_torture_fwd_prog(void *args) firsttime = false; WRITE_ONCE(rcu_fwd_seq, rcu_fwd_seq + 1); } else { - while (READ_ONCE(rcu_fwd_seq) == oldseq) + while (READ_ONCE(rcu_fwd_seq) == oldseq && !torture_must_stop()) schedule_timeout_interruptible(1); oldseq = READ_ONCE(rcu_fwd_seq); } -- cgit v1.2.3