linux-kernel - [PATCH 0/2] sched: SCA vs hotplug vs stopper races fixes

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Message-Id: <20210526205751.842360-1-valentin.schneider@arm.com>
Date:   Wed, 26 May 2021 21:57:49 +0100
From:   Valentin Schneider <valentin.schneider@....com>
To:     linux-kernel@...r.kernel.org
Cc:     Will Deacon <will@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Qais Yousef <qais.yousef@....com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Quentin Perret <qperret@...gle.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        kernel-team@...roid.com
Subject: [PATCH 0/2] sched: SCA vs hotplug vs stopper races fixes

Hi folks,

This is the continuation of [1]. As Will noted, that patch isn't sufficient to
plug all the nasty races involving SCA, hotplug and the stopper task, hence
patch 2.

I have to apologize as this didn't see much testing (a CPU hog, a crazed
taskset, and some hotplugs in a loop), and unfortunately I need to call it a day
before running away to the british wilderness 'till Monday. I'll get back to it
then to expunge the remaining daftness.  

[1]: http://lore.kernel.org/r/877djlhhmb.mognet@arm.com

Cheers,
Valentin

Valentin Schneider (2):
  sched: Don't defer CPU pick to migration_cpu_stop()
  sched: Plug race between SCA, hotplug and migration_cpu_stop()

 kernel/sched/core.c | 50 ++++++++++++++++++++++++++++++---------------
 1 file changed, 33 insertions(+), 17 deletions(-)

--
2.25.1