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Date: Thu, 26 Jan 2012 09:13:16 -0600 (CST)
From: Christoph Lameter <cl@linux.com>
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To: Gilad Ben-Yossef <gilad@benyossef.com>
cc: linux-kernel@vger.kernel.org, Mel Gorman <mel@csn.ul.ie>,
        KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
        Chris Metcalf <cmetcalf@tilera.com>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Russell King <linux@arm.linux.org.uk>, linux-mm@kvack.org,
        Pekka Enberg <penberg@kernel.org>, Matt Mackall <mpm@selenic.com>,
        Sasha Levin <levinsasha928@gmail.com>, Rik van Riel <riel@redhat.com>,
        Andi Kleen <andi@firstfloor.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        linux-fsdevel@vger.kernel.org, Avi Kivity <avi@redhat.com>,
        Michal Nazarewicz <mina86@mina86.com>, Milton Miller <miltonm@bga.com>
Subject: Re: [v7 7/8] mm: only IPI CPUs to drain local pages if they exist
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On Thu, 26 Jan 2012, Gilad Ben-Yossef wrote:

> Calculate a cpumask of CPUs with per-cpu pages in any zone
> and only send an IPI requesting CPUs to drain these pages
> to the buddy allocator if they actually have pages when
> asked to flush.

Acked-by: Christoph Lameter <cl@linux.com>