linux-kernel - Re: [PATCH 6/6] nohz: Use IPI implicit full barrier against rq->nr

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Message-ID: <20140610162415.GC1951@localhost.localdomain>
Date:	Tue, 10 Jun 2014 18:24:17 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>,
	Kevin Hilman <khilman@...aro.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Viresh Kumar <viresh.kumar@...aro.org>
Subject: Re: [PATCH 6/6] nohz: Use IPI implicit full barrier against
 rq->nr_running r/w

On Tue, Jun 10, 2014 at 05:48:13PM +0200, Peter Zijlstra wrote:
> On Tue, Jun 10, 2014 at 05:15:09PM +0200, Frederic Weisbecker wrote:
> > +       /*
> > +	* More than one running task need preemption.
> > +	* nr_running update is assumed to be visible
> > +	* after IPI is sent from wakers.
> > +	*/
> 
> That looks like whitespace damage.

Ah, $EDITOR failed again while showing off. I'll fix that for the pull request.

Thanks.
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