From: Paul E. McKenney Date: Fri, 17 Dec 2021 23:05:05 +0000 (-0800) Subject: rcutorture: Add end-of-test check to rcu_torture_fwd_prog() loop X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=02b51a1cf47977d8772c7dcc363ef6a1e6e59f21;p=linux.git 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 --- diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index afe95c6948957..e99658efd97f4 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); }