From: Uladzislau Rezki <urezki@gmail.com>
To: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Uladzislau Rezki <urezki@gmail.com>,
LKML <linux-kernel@vger.kernel.org>, RCU <rcu@vger.kernel.org>,
Michael Ellerman <mpe@ellerman.id.au>,
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>,
Oleksiy Avramchenko <oleksiy.avramchenko@sonymobile.com>
Subject: Re: [PATCH 2/2] rcu-tasks: add RCU-tasks self tests
Date: Mon, 21 Dec 2020 19:45:39 +0100 [thread overview]
Message-ID: <20201221184539.GA24895@pc638.lan> (raw)
In-Reply-To: <20201221171805.GW2657@paulmck-ThinkPad-P72>
On Mon, Dec 21, 2020 at 09:18:05AM -0800, Paul E. McKenney wrote:
> On Mon, Dec 21, 2020 at 04:38:09PM +0100, Uladzislau Rezki wrote:
> > On Wed, Dec 16, 2020 at 03:29:55PM -0800, Paul E. McKenney wrote:
> > > On Wed, Dec 16, 2020 at 04:49:59PM +0100, Uladzislau Rezki wrote:
>
> [ . . . ]
>
> > > > 2.20.1
> > >
> > > Again, much improved!
> > >
> > See below the v3 version. I hope i fixed all comments :)
> >
> > >From 06f7adfd84cbb1994d0e2693ee9dcdfd272a9bd0 Mon Sep 17 00:00:00 2001
> > From: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
> > Date: Wed, 9 Dec 2020 21:27:32 +0100
> > Subject: [PATCH v3 1/1] rcu-tasks: Add RCU-tasks self tests
> >
> > This commit adds self tests for early-boot use of RCU-tasks grace periods.
> > It tests all three variants (Rude, Tasks, and Tasks Trace) and covers
> > both synchronous (e.g., synchronize_rcu_tasks()) and asynchronous (e.g.,
> > call_rcu_tasks()) grace-period APIs.
> >
> > Self-tests are run only in kernels built with CONFIG_PROVE_RCU=y.
> >
> > Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
>
> Much better!
>
> I pulled this in, but made one small additional change. Please let me
> know if this is problematic.
>
> Thanx, Paul
>
> ------------------------------------------------------------------------
>
> commit 93372198b5c9efdfd288aa3b3ee41c1f90866886
> Author: Uladzislau Rezki (Sony) <urezki@gmail.com>
> Date: Wed Dec 9 21:27:32 2020 +0100
>
> rcu-tasks: Add RCU-tasks self tests
>
> This commit adds self tests for early-boot use of RCU-tasks grace periods.
> It tests all three variants (Rude, Tasks, and Tasks Trace) and covers
> both synchronous (e.g., synchronize_rcu_tasks()) and asynchronous (e.g.,
> call_rcu_tasks()) grace-period APIs.
>
> Self-tests are run only in kernels built with CONFIG_PROVE_RCU=y.
>
> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
>
> diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h
> index 3660755..35a2cd5 100644
> --- a/kernel/rcu/tasks.h
> +++ b/kernel/rcu/tasks.h
> @@ -1224,6 +1224,40 @@ void show_rcu_tasks_gp_kthreads(void)
> }
> #endif /* #ifndef CONFIG_TINY_RCU */
>
> +struct rcu_tasks_test_desc {
> + struct rcu_head rh;
> + const char *name;
> + bool notrun;
> +};
> +
> +static struct rcu_tasks_test_desc tests[] = {
> + {
> + .name = "call_rcu_tasks()",
> + /* If not defined, the test is skipped. */
> + .notrun = !IS_ENABLED(CONFIG_TASKS_RCU),
> + },
> + {
> + .name = "call_rcu_tasks_rude()",
> + /* If not defined, the test is skipped. */
> + .notrun = !IS_ENABLED(CONFIG_TASKS_RUDE_RCU),
> + },
> + {
> + .name = "call_rcu_tasks_trace()",
> + /* If not defined, the test is skipped. */
> + .notrun = !IS_ENABLED(CONFIG_TASKS_TRACE_RCU)
> + }
> +};
> +
> +static void test_rcu_tasks_callback(struct rcu_head *rhp)
> +{
> + struct rcu_tasks_test_desc *rttd =
> + container_of(rhp, struct rcu_tasks_test_desc, rh);
> +
> + pr_info("Callback from %s invoked.\n", rttd->name);
That is fine! We can output the name instead of executed counter.
Doing so makes it completely clear who triggers the callback.
--
Vlad Rezki
next prev parent reply other threads:[~2020-12-21 18:46 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 ` [PATCH 2/2] rcu-tasks: add RCU-tasks self tests Uladzislau Rezki (Sony)
2020-12-16 15:49 ` 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 [this message]
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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