linux-kernel - Re: [PATCH v2] stop_machine: Make migration_cpu_stop() does useful works for CONFIG_PREEMPT

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Date:   Fri, 9 Sep 2016 18:24:14 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Oleg Nesterov <oleg@...hat.com>
Cc:     Cheng Chao <chengchao@...acom.com>, mingo@...nel.org,
        tj@...nel.org, akpm@...ux-foundation.org, chris@...is-wilson.co.uk,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] stop_machine: Make migration_cpu_stop() does useful
 works for CONFIG_PREEMPT_NONE

On Fri, Sep 09, 2016 at 03:14:49PM +0200, Oleg Nesterov wrote:
> On 09/09, Cheng Chao wrote:
> >
> > If the migration_cpu_stop() can not migrate,why do we call stop_one_cpu()?
> > It just makes the task TASK_UNINTERRUPTIBLE, wakes up the stopper thread,
> > executes migration_cpu_stop(), and the stopper thread wakes up the task.
> 

Still not seeing any mail from Cheng Chao. I think he's mailing from a
domain that's not accepting email and then infradead makes its go-away,
why accept email from people who will not accept bounces.

Cheng, please fix your email setup.