From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161814AbXDZJrt (ORCPT ); Thu, 26 Apr 2007 05:47:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161818AbXDZJrt (ORCPT ); Thu, 26 Apr 2007 05:47:49 -0400 Received: from mx1.suse.de ([195.135.220.2]:49155 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161814AbXDZJrs (ORCPT ); Thu, 26 Apr 2007 05:47:48 -0400 From: Andi Kleen Organization: SUSE Linux Products GmbH, Nuernberg, GF: Markus Rex, HRB 16746 (AG Nuernberg) To: KAMEZAWA Hiroyuki Subject: Re: [PATCH] change global zonelist order on NUMA v2 Date: Thu, 26 Apr 2007 11:47:44 +0200 User-Agent: KMail/1.9.6 Cc: LKML , Linux-MM , AKPM , Christoph Lameter References: <20070426183417.058f6f9e.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20070426183417.058f6f9e.kamezawa.hiroyu@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200704261147.44413.ak@suse.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thursday 26 April 2007 11:34:17 KAMEZAWA Hiroyuki wrote: > > Changelog from V1 -> V2 > - sysctl name is changed to be relaxed_zone_order > - NORMAL->NORMAL->....->DMA->DMA->DMA order (new ordering) is now default. > NORMAL->DMA->NORMAL->DMA order (old ordering) is optional. > - addes boot opttion to set relaxed_zone_order. ia64 is supported now. > - Added documentation > > patch is against 2.6.21-rc7-mm2. tested on ia64 NUMA box. works well. IMHO the change should be default (without any options) unless someone can come up with a good reason why not. On x86-64 it should be definitely default. If there is a good reason on some architecture or machine a user option is also not a good idea, but instead it should be set automatically by that architecture or machine on boot. -Andi