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Date: Fri, 9 Sep 2016 18:24:14 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Cheng Chao <chengchao@kedacom.com>, mingo@kernel.org, tj@kernel.org,
        akpm@linux-foundation.org, chris@chris-wilson.co.uk,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] stop_machine: Make migration_cpu_stop() does useful
 works for CONFIG_PREEMPT_NONE
Message-ID: <20160909162414.GI10153@twins.programming.kicks-ass.net>
References: <OF73BCE1E4.D2224FEC-ON48258025.0022CFA7-48258025.0022E3DC@kedacom.com>
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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.