From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754267AbZDVAf6 (ORCPT ); Tue, 21 Apr 2009 20:35:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752361AbZDVAfr (ORCPT ); Tue, 21 Apr 2009 20:35:47 -0400 Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]:33056 "EHLO fgwmail6.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751352AbZDVAfr (ORCPT ); Tue, 21 Apr 2009 20:35:47 -0400 From: KOSAKI Motohiro To: Mel Gorman Subject: Re: [PATCH 22/25] Update NR_FREE_PAGES only as necessary Cc: kosaki.motohiro@jp.fujitsu.com, Linux Memory Management List , Christoph Lameter , Nick Piggin , Linux Kernel Mailing List , Lin Ming , Zhang Yanmin , Peter Zijlstra , Pekka Enberg , Andrew Morton 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> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.50 [ja] Date: Wed, 22 Apr 2009 09:35:38 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.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 > Reviewed-by: Christoph Lameter Reviewed-by: KOSAKI Motohiro