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From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Subject: Re: [PATCH 22/25] Update NR_FREE_PAGES only as necessary
In-Reply-To: <1240266011-11140-23-git-send-email-mel@csn.ul.ie>
References: <1240266011-11140-1-git-send-email-mel@csn.ul.ie> <1240266011-11140-23-git-send-email-mel@csn.ul.ie>
Message-Id: <20090422093506.6274.A69D9226@jp.fujitsu.com>
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Date: Wed, 22 Apr 2009 09:35:38 +0900 (JST)
Sender: owner-linux-mm@kvack.org
To: Mel Gorman <mel@csn.ul.ie>
Cc: kosaki.motohiro@jp.fujitsu.com, Linux Memory Management List <linux-mm@kvack.org>, Christoph Lameter <cl@linux-foundation.org>, Nick Piggin <npiggin@suse.de>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Lin Ming <ming.m.lin@intel.com>, Zhang Yanmin <yanmin_zhang@linux.intel.com>, Peter Zijlstra <peterz@infradead.org>, Pekka Enberg <penberg@cs.helsinki.fi>, Andrew Morton <akpm@linux-foundation.org>
List-ID: <linux-mm.kvack.org>

> When pages are being freed to the buddy allocator, the zone
> NR_FREE_PAGES counter must be updated. In the case of bulk per-cpu page
> freeing, it's updated once per page. This retouches cache lines more
> than necessary. Update the counters one per per-cpu bulk free.
> 
> Signed-off-by: Mel Gorman <mel@csn.ul.ie>
> Reviewed-by: Christoph Lameter <cl@linux-foundation.org>

	Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>




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