From: Peter Zijlstra <peterz@infradead.org>
To: "Zhang, Qiang" <Qiang.Zhang@windriver.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Question on workqueue: Manually break affinity on hotplug
Date: Thu, 14 Jan 2021 10:11:48 +0100 [thread overview]
Message-ID: <YAAK1MOPAPjrbSIt@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <BYAPR11MB2632FC41FF64133708F4537FFFA80@BYAPR11MB2632.namprd11.prod.outlook.com>
On Thu, Jan 14, 2021 at 08:03:23AM +0000, Zhang, Qiang wrote:
> Hello Peter
>
> Excuse me, I have some questions for you, about a description of this change:
>
> ''Don't rely on the scheduler to force break affinity for us -- it will
> stop doing that for per-cpu-kthreads."
>
> this mean when cpuhotplug, scheduler do not change affinity for per-cpu-kthread's task, if we not active setting affinity?
> but if per-cpu-kthread's task is not run state, when wake up, will reset it's affinity, this is done automatically.
>
> or is it, this place modified to fit the new one hotplug mechanism which
> ("sched/hotplug: Consolidate task migration on CPU unplug")?
https://lkml.kernel.org/r/20201214155457.3430-1-jiangshanlai@gmail.com
https://lkml.kernel.org/r/20201218170919.2950-1-jiangshanlai@gmail.com
https://lkml.kernel.org/r/20201226025117.2770-1-jiangshanlai@gmail.com
https://lkml.kernel.org/r/20210111152638.2417-1-jiangshanlai@gmail.com
https://lkml.kernel.org/r/20210112144344.850850975@infradead.org
next prev parent reply other threads:[~2021-01-14 9:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-14 8:03 Zhang, Qiang
2021-01-14 9:11 ` Peter Zijlstra [this message]
2021-01-17 10:16 ` 回复: " Zhang, Qiang
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