linux-kernel - Re: [PATCH v5 3/3] CPU hotplug, smp: Flush any pending IPI callbacks before CPU offline

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Message-ID: <20140515191938.GB21306@htj.dyndns.org>
Date:	Thu, 15 May 2014 15:19:38 -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 3/3] CPU hotplug, smp: Flush any pending IPI callbacks
 before CPU offline

Hello,

On Fri, May 16, 2014 at 12:44:13AM +0530, Srivatsa S. Bhat wrote:
>  /*
> + * flush_smp_call_function_queue - Flush any pending smp-call-function

Don't we need a blank line here?

> + * callbacks queued on this CPU (including those for which the source CPU's
> + * IPIs might not have been received on this CPU yet). This is invoked by a
> + * CPU about to go offline, to ensure that all pending IPI functions are run
> + * before it goes completely offline.
> + *
> + * Loop through the call_single_queue and run all the queued functions.
> + * Must be called with interrupts disabled.
> + */

Other than that, looks good to me.

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

Thanks.

-- 
tejun
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