diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 0b7af7e2bcbb..8986ef3a9588 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -1334,7 +1334,8 @@ static bool rcu_torture_one_read(struct torture_random_state *trsp)
 	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->get_gp_seq();