rcutorture: Dump trace buffer for callback pipe drain failures

Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>

diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 6b803fb2f7ca8d65cf595eca843c93fec30bdf2a..89be0f492f78f300ab93e870d08fde9a49d2d352 100644 (file)
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -1060,8 +1060,10 @@ rcu_torture_writer(void *arg)
                        for (i = 0; i < ARRAY_SIZE(rcu_tortures); i++)
                                if (list_empty(&rcu_tortures[i].rtort_free) &&
                                    rcu_access_pointer(rcu_torture_current) !=
-                                   &rcu_tortures[i])
+                                   &rcu_tortures[i]) {
+                                       rcu_ftrace_dump(DUMP_ALL);
                                        WARN(1, "%s: rtort_pipe_count: %d\n", __func__, rcu_tortures[i].rtort_pipe_count);
+                               }
        } while (!torture_must_stop());
        /* Reset expediting back to unexpedited. */
        if (expediting > 0)