From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932475AbWGHBAY (ORCPT ); Fri, 7 Jul 2006 21:00:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932476AbWGHBAY (ORCPT ); Fri, 7 Jul 2006 21:00:24 -0400 Received: from cantor2.suse.de ([195.135.220.15]:43209 "EHLO mx2.suse.de") by vger.kernel.org with ESMTP id S932475AbWGHBAX (ORCPT ); Fri, 7 Jul 2006 21:00:23 -0400 From: Andi Kleen To: Christoph Lameter Subject: Re: [RFC 5/8] x86_64 without ZONE_DMA Date: Sat, 8 Jul 2006 03:00:16 +0200 User-Agent: KMail/1.9.3 Cc: linux-kernel@vger.kernel.org, Martin Bligh , Christoph Hellwig , Marcelo Tosatti , Arjan van de Ven , Nick Piggin , KAMEZAWA Hiroyuki References: <20060708000501.3829.25578.sendpatchset@schroedinger.engr.sgi.com> <200607080220.39100.ak@suse.de> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200607080300.16931.ak@suse.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Saturday 08 July 2006 02:42, Christoph Lameter wrote: > On Sat, 8 Jul 2006, Andi Kleen wrote: > > > I don't think the savings from this are enough to bother > > the user with such an obscure config option. > > The savings are not only from the code paths. The VM itself is cleaner and > the balancing issues are not that troublesome anymore. Doesn't help - it has to be fixed anyways for NUMA and other architectures. Also in my experience empty zones are not a significant problem for VM balancing. -Andi