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From: Valentin Schneider <valentin.schneider@arm.com>
To: linux-kernel@vger.kernel.org
Cc: Will Deacon <will@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@kernel.org>,
	Morten Rasmussen <morten.rasmussen@arm.com>,
	Qais Yousef <qais.yousef@arm.com>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>,
	Quentin Perret <qperret@google.com>,
	Juri Lelli <juri.lelli@redhat.com>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	kernel-team@android.com
Subject: [PATCH 0/2] sched: SCA vs hotplug vs stopper races fixes
Date: Wed, 26 May 2021 21:57:49 +0100	[thread overview]
Message-ID: <20210526205751.842360-1-valentin.schneider@arm.com> (raw)

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


             reply	other threads:[~2021-05-26 20:58 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-26 20:57 Valentin Schneider [this message]
2021-05-26 20:57 ` [PATCH 1/2] sched: Don't defer CPU pick to migration_cpu_stop() Valentin Schneider
2021-06-01 14:04   ` [tip: sched/core] " tip-bot2 for Valentin Schneider
2021-05-26 20:57 ` [PATCH 2/2] sched: Plug race between SCA, hotplug and migration_cpu_stop() Valentin Schneider
2021-05-27  9:12   ` Peter Zijlstra
2021-06-01 16:59   ` Valentin Schneider
2021-06-02 15:26     ` Will Deacon
2021-06-02 19:43       ` Valentin Schneider
2021-06-22 13:51         ` Will Deacon
2021-06-24  9:33           ` Valentin Schneider

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