linux-kernel - Re: [PATCH] hotplug: Optimize {get,put}_online

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Message-ID: <20130925163357.GB17447@redhat.com>
Date:	Wed, 25 Sep 2013 18:33:57 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] hotplug: Optimize {get,put}_online_cpus()

On 09/25, Peter Zijlstra wrote:
>
> On Wed, Sep 25, 2013 at 05:16:42PM +0200, Oleg Nesterov wrote:
>
> > And in this case (I think) we do not care, we are already in the critical
> > section.
>
> I tend to agree, however paranoia..

Ah, in this case I tend to agree. better be paranoid ;)

Oleg.

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