From: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
To: LKML <linux-kernel@vger.kernel.org>, RCU <rcu@vger.kernel.org>,
"Paul E . McKenney" <paulmck@kernel.org>,
Michael Ellerman <mpe@ellerman.id.au>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Daniel Axtens <dja@axtens.net>,
Frederic Weisbecker <frederic@kernel.org>,
Neeraj Upadhyay <neeraju@codeaurora.org>,
Joel Fernandes <joel@joelfernandes.org>,
Peter Zijlstra <peterz@infradead.org>,
Michal Hocko <mhocko@suse.com>,
Thomas Gleixner <tglx@linutronix.de>,
"Theodore Y . Ts'o" <tytso@mit.edu>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Uladzislau Rezki <urezki@gmail.com>,
Oleksiy Avramchenko <oleksiy.avramchenko@sonymobile.com>
Subject: [PATCH 2/2] rcu-tasks: add RCU-tasks self tests
Date: Wed, 9 Dec 2020 21:27:32 +0100 [thread overview]
Message-ID: <20201209202732.5896-2-urezki@gmail.com> (raw)
In-Reply-To: <20201209202732.5896-1-urezki@gmail.com>
Add self tests for checking of RCU-tasks API functionality.
It covers:
- wait API functions;
- invoking/completion call_rcu_tasks*().
Self-tests are run when CONFIG_PROVE_RCU kernel parameter is set.
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
---
kernel/rcu/tasks.h | 44 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h
index 67a162949763..9407772780c1 100644
--- a/kernel/rcu/tasks.h
+++ b/kernel/rcu/tasks.h
@@ -1225,6 +1225,16 @@ void show_rcu_tasks_gp_kthreads(void)
}
#endif /* #ifndef CONFIG_TINY_RCU */
+static struct rcu_head rhp;
+static int rcu_execurted_test_counter;
+static int rcu_run_test_counter;
+
+static void test_rcu_tasks_callback(struct rcu_head *r)
+{
+ pr_info("RCU-tasks test callback executed %d\n",
+ ++rcu_execurted_test_counter);
+}
+
void __init rcu_init_tasks_generic(void)
{
#ifdef CONFIG_TASKS_RCU
@@ -1238,7 +1248,41 @@ void __init rcu_init_tasks_generic(void)
#ifdef CONFIG_TASKS_TRACE_RCU
rcu_spawn_tasks_trace_kthread();
#endif
+
+ if (IS_ENABLED(CONFIG_PROVE_RCU)) {
+ pr_info("Running RCU-tasks wait API self tests\n");
+#ifdef CONFIG_TASKS_RCU
+ rcu_run_test_counter++;
+ call_rcu_tasks(&rhp, test_rcu_tasks_callback);
+ synchronize_rcu_tasks();
+#endif
+
+#ifdef CONFIG_TASKS_RUDE_RCU
+ rcu_run_test_counter++;
+ call_rcu_tasks_trace(&rhp, test_rcu_tasks_callback);
+ synchronize_rcu_tasks_rude();
+#endif
+
+#ifdef CONFIG_TASKS_TRACE_RCU
+ rcu_run_test_counter++;
+ call_rcu_tasks_trace(&rhp, test_rcu_tasks_callback);
+ synchronize_rcu_tasks_trace();
+#endif
+ }
+}
+
+static int rcu_tasks_verify_self_tests(void)
+{
+ int ret = 0;
+
+ if (rcu_run_test_counter != rcu_execurted_test_counter) {
+ WARN_ON(1);
+ ret = -1;
+ }
+
+ return ret;
}
+late_initcall(rcu_tasks_verify_self_tests);
#else /* #ifdef CONFIG_TASKS_RCU_GENERIC */
static inline void rcu_tasks_bootup_oddness(void) {}
--
2.20.1
next prev parent reply other threads:[~2020-12-09 20:31 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-09 20:27 [PATCH 1/2] rcu-tasks: move RCU-tasks initialization out of core_initcall() Uladzislau Rezki (Sony)
2020-12-09 20:27 ` Uladzislau Rezki (Sony) [this message]
2020-12-16 15:49 ` [PATCH 2/2] rcu-tasks: add RCU-tasks self tests Uladzislau Rezki
2020-12-16 23:29 ` Paul E. McKenney
2020-12-21 15:38 ` Uladzislau Rezki
2020-12-21 17:18 ` Paul E. McKenney
2020-12-21 18:45 ` Uladzislau Rezki
2020-12-21 19:29 ` Paul E. McKenney
2020-12-21 19:48 ` Uladzislau Rezki
2020-12-21 20:45 ` Paul E. McKenney
2020-12-21 21:28 ` Uladzislau Rezki
2021-02-12 19:20 ` Sebastian Andrzej Siewior
2021-02-12 21:12 ` Uladzislau Rezki
2021-02-12 23:48 ` Paul E. McKenney
2021-02-13 0:37 ` Paul E. McKenney
2021-02-13 0:43 ` Paul E. McKenney
2021-02-13 11:30 ` Uladzislau Rezki
2021-02-13 16:45 ` Paul E. McKenney
2021-02-13 20:00 ` Uladzislau Rezki
2021-02-15 11:28 ` Sebastian Andrzej Siewior
2021-02-16 17:30 ` Paul E. McKenney
2021-02-17 14:47 ` Masami Hiramatsu
2021-02-17 18:17 ` Paul E. McKenney
2021-02-18 5:03 ` Masami Hiramatsu
2021-02-18 8:36 ` Uladzislau Rezki
2021-02-18 14:29 ` Masami Hiramatsu
2020-12-09 20:37 ` [PATCH 1/2] rcu-tasks: move RCU-tasks initialization out of core_initcall() Uladzislau Rezki
2020-12-10 13:39 ` Daniel Axtens
2020-12-10 17:32 ` Paul E. McKenney
2020-12-10 18:17 ` Uladzislau Rezki
2020-12-10 3:26 ` Paul E. McKenney
2020-12-10 13:04 ` Uladzislau Rezki
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