Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755322AbYGKQOT (ORCPT ); Fri, 11 Jul 2008 12:14:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753582AbYGKQOH (ORCPT ); Fri, 11 Jul 2008 12:14:07 -0400 Received: from terminus.zytor.com ([198.137.202.10]:55721 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753333AbYGKQOG (ORCPT ); Fri, 11 Jul 2008 12:14:06 -0400 Message-ID: <4877852A.7070203@zytor.com> Date: Fri, 11 Jul 2008 12:07:06 -0400 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Christoph Lameter CC: Mike Travis , Jeremy Fitzhardinge , "Eric W. Biederman" , Arjan van de Ven , Ingo Molnar , Andrew Morton , Jack Steiner , linux-kernel@vger.kernel.org, Rusty Russell Subject: Re: [RFC 00/15] x86_64: Optimize percpu accesses References: <20080709165129.292635000@polaris-admin.engr.sgi.com> <20080709200757.GD14009@elte.hu> <48751B57.8030605@goop.org> <20080709133958.612635f0@infradead.org> <4875231F.1020506@zytor.com> <487524A0.6020304@goop.org> <487529AE.3060505@zytor.com> <48753A71.2030006@zytor.com> <48763732.7020805@sgi.com> <487641D6.5060206@goop.org> <487649B2.3000405@sgi.com> <48764E8A.5010400@zytor.com> <4876766F.4030605@linux-foundation.org> <48767804.8080007@zytor.com> <48767A28.7070900@linux-foundation.org> <48767AF5.7030205@zytor.com> <48777D15.6040107@linux-foundation.org> In-Reply-To: <48777D15.6040107@linux-foundation.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 560 Lines: 16 Christoph Lameter wrote: >>> >> No, not i386. x86-64. > > x86_64 are small systems? For 64 bit use one would expect 4GB of memory. Hardly so. i386 has too many other limitations; for one thing, it starts having performance problems (needing HIHGMEM) at less than 1 GB. The additional registers, etc. -hpa -- 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/