diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index f0c599bf4058..c9031fa8f1d1 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -1112,7 +1112,8 @@ static void rcu_torture_timer(unsigned long unused)
 	preempt_disable();
 	pipe_count = p->rtort_pipe_count;
 	if (pipe_count > RCU_TORTURE_PIPE_LEN) {
-		/* Should not happen, but... */
+		// Should not happen in a correct RCU implementation,
+		// happens quite often for torture_type=busted.
 		pipe_count = RCU_TORTURE_PIPE_LEN;
 	}
 	completed = cur_ops->completed();