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From: Lai Jiangshan <jiangshanlai@gmail.com>
To: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Hillf Danton <hdanton@sina.com>,
	LKML <linux-kernel@vger.kernel.org>,
	Valentin Schneider <valentin.schneider@arm.com>,
	Peter Zijlstra <peterz@infradead.org>, Qian Cai <cai@redhat.com>,
	Vincent Donnefort <vincent.donnefort@arm.com>,
	Lai Jiangshan <laijs@linux.alibaba.com>,
	Tejun Heo <tj@kernel.org>
Subject: Re: [PATCH -tip V2 00/10] workqueue: break affinity initiatively
Date: Sun, 27 Dec 2020 22:08:51 +0800
Message-ID: <CAJhGHyBGb_fBqp7-XCD0bkZOt5E_aPKwkViY3PUN1MVZuBE3KA@mail.gmail.com> (raw)
In-Reply-To: <20201226145239.GJ2657@paulmck-ThinkPad-P72>

On Sat, Dec 26, 2020 at 10:52 PM Paul E. McKenney <paulmck@kernel.org> wrote:

> >
> > Can you please specify a bit what you encountered in rcutorture
> > before this patchset? You know we cant have a correct estimation
> > of the fix diameter without your help.

>
> It triggers the following in sched_cpu_dying() in kernel/sched/core.c,
> exactly the same as for Lai Jiangshan:
>
>         BUG_ON(rq->nr_running != 1 || rq_has_pinned_tasks(rq))
>
> Which is in fact the "this" in my earlier "rcutorture hits this".  ;-)
>
>                                                         Thanx, Paul
>

Hi, Hillf

https://lkml.org/lkml/2020/12/22/141

From the email, I think rcutorture encountered the same problem.

Hi, Paul

I'm sorry to forget to add your Tested-by.

Thanks
Lai

  reply index

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-18 17:09 Lai Jiangshan
2020-12-18 17:09 ` [PATCH -tip V2 01/10] workqueue: restore unbound_workers' cpumask correctly Lai Jiangshan
2020-12-18 17:09 ` [PATCH -tip V2 02/10] workqueue: use cpu_possible_mask instead of cpu_active_mask to break affinity Lai Jiangshan
2020-12-18 17:09 ` [PATCH -tip V2 03/10] workqueue: Manually break affinity on pool detachment Lai Jiangshan
2020-12-18 17:09 ` [PATCH -tip V2 04/10] workqueue: don't set the worker's cpumask when kthread_bind_mask() Lai Jiangshan
2020-12-24  6:33   ` [workqueue] 6094661b16: WARNING:at_kernel/sched/core.c:#__set_cpus_allowed_ptr kernel test robot
2020-12-18 17:09 ` [PATCH -tip V2 05/10] workqueue: introduce wq_online_cpumask Lai Jiangshan
2020-12-18 17:09 ` [PATCH -tip V2 06/10] workqueue: use wq_online_cpumask in restore_unbound_workers_cpumask() Lai Jiangshan
2020-12-18 17:09 ` [PATCH -tip V2 07/10] workqueue: Manually break affinity on hotplug for unbound pool Lai Jiangshan
2020-12-18 17:09 ` [PATCH -tip V2 08/10] workqueue: reorganize workqueue_online_cpu() Lai Jiangshan
2020-12-18 17:09 ` [PATCH -tip V2 09/10] workqueue: reorganize workqueue_offline_cpu() unbind_workers() Lai Jiangshan
2020-12-18 17:09 ` [PATCH -tip V2 10/10] workqueue: Fix affinity of kworkers when attaching into pool Lai Jiangshan
2020-12-18 17:59   ` Valentin Schneider
2020-12-19  1:11     ` Lai Jiangshan
2020-12-22 21:39 ` [PATCH -tip V2 00/10] workqueue: break affinity initiatively Dexuan-Linux Cui
2020-12-23 11:32   ` Lai Jiangshan
2020-12-23 15:01   ` Lai Jiangshan
2020-12-23 20:27     ` Dexuan Cui
2020-12-23 20:39       ` Dexuan Cui
2020-12-23 19:49 ` Paul E. McKenney
     [not found] ` <20201226103421.6616-1-hdanton@sina.com>
2020-12-26 14:52   ` Paul E. McKenney
2020-12-27 14:08     ` Lai Jiangshan [this message]
2020-12-27 16:02       ` Paul E. McKenney

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