Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750853AbVLKTso (ORCPT ); Sun, 11 Dec 2005 14:48:44 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750851AbVLKTso (ORCPT ); Sun, 11 Dec 2005 14:48:44 -0500 Received: from ns2.suse.de ([195.135.220.15]:34261 "EHLO mx2.suse.de") by vger.kernel.org with ESMTP id S1750848AbVLKTsn (ORCPT ); Sun, 11 Dec 2005 14:48:43 -0500 Date: Sun, 11 Dec 2005 20:48:40 +0100 From: Andi Kleen To: Marcelo Tosatti Cc: Christoph Lameter , linux-kernel@vger.kernel.org, Hugh Dickins , Nick Piggin , linux-mm@kvack.org, Andi Kleen Subject: Re: [RFC 3/6] Make nr_pagecache a per zone counter Message-ID: <20051211194840.GU11190@wotan.suse.de> References: <20051210005440.3887.34478.sendpatchset@schroedinger.engr.sgi.com> <20051210005456.3887.94412.sendpatchset@schroedinger.engr.sgi.com> <20051211183241.GD4267@dmt.cnet> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20051211183241.GD4267@dmt.cnet> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 506 Lines: 12 > By the way, why does nr_pagecache needs to be an atomic variable on UP systems? At least on X86 UP atomic doesn't use the LOCK prefix and is thus quite cheap. I would expect other architectures who care about UP performance (= not IA64) to be similar. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/