linux-kernel - Re: [PATCH v5 2/3] CPU hotplug, stop-machine: Plug race-window that leads to "IPI-to-offline-CPU"

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Message-ID: <20140515191720.GA21306@htj.dyndns.org>
Date:	Thu, 15 May 2014 15:17:20 -0400
From:	Tejun Heo <tj@...nel.org>
To:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
Cc:	peterz@...radead.org, tglx@...utronix.de, mingo@...nel.org,
	rusty@...tcorp.com.au, akpm@...ux-foundation.org,
	fweisbec@...il.com, hch@...radead.org, mgorman@...e.de,
	riel@...hat.com, bp@...e.de, rostedt@...dmis.org,
	mgalbraith@...e.de, ego@...ux.vnet.ibm.com,
	paulmck@...ux.vnet.ibm.com, oleg@...hat.com, rjw@...ysocki.net,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 2/3] CPU hotplug, stop-machine: Plug race-window that
 leads to "IPI-to-offline-CPU"

On Fri, May 16, 2014 at 12:43:44AM +0530, Srivatsa S. Bhat wrote:
> During CPU offline, stop-machine is used to take control over all the online
> CPUs (via the per-cpu stopper thread) and then run take_cpu_down() on the CPU
> that is to be taken offline.
...
> Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@...ux.vnet.ibm.com>

Reviewed-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun
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