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

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Message-ID: <20130921191317.GA15531@redhat.com>
Date:	Sat, 21 Sep 2013 21:13:17 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	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>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH] hotplug: Optimize {get,put}_online_cpus()

On 09/21, Oleg Nesterov wrote:
>
> As for the patch itself, I am not sure.

Forgot to mention... and with this patch cpu_hotplug_done() loses the
"release" semantics, not sure this is fine.

Oleg.

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