linux-kernel - [PATCH 0/2] rcutorture: Some PREEMPT

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Message-Id: <20210803225437.3612591-1-valentin.schneider@arm.com>
Date:   Tue,  3 Aug 2021 23:54:35 +0100
From:   Valentin Schneider <valentin.schneider@....com>
To:     linux-kernel@...r.kernel.org, rcu@...r.kernel.org,
        linux-rt-users@...r.kernel.org
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Steven Rostedt <rostedt@...dmis.org>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Frederic Weisbecker <frederic@...nel.org>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Josh Triplett <josh@...htriplett.org>,
        Davidlohr Bueso <dave@...olabs.net>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Joel Fernandes <joel@...lfernandes.org>
Subject: [PATCH 0/2] rcutorture: Some PREEMPT_RT fixlets

Hi folks,

I've been meaning to run RCU torture under v5.13-rt1 to validate my hacking
around the RCU offloaded state [1], but have hit some warnings.

The second patch clearly isn't a thing of beauty, but FWIW it lets me run RCU
torture tests without any extra steps.

As mentioned over IRC, this started as a .setup() callback for the kosftirqd
threads gated behind CONFIG_RCU_BOOST && CONFIG_RCU_TORTURE_TEST, but I figured
keeping RCU torture specific stuff within rcutorture.c would be a tad smarter.
I hate either version, but here it is regardless.

[1]: https://lore.kernel.org/lkml/20210728220137.GD293265@lothringen/

Cheers,
Valentin

Valentin Schneider (2):
  rcutorture: Don't disable softirqs with preemption disabled when
    PREEMPT_RT
  rcutorture: Nudge ksoftirqd priority for RCU boost testing

 kernel/rcu/rcutorture.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

--
2.25.1