From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755074AbYC1Ng0 (ORCPT ); Fri, 28 Mar 2008 09:36:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752237AbYC1NgT (ORCPT ); Fri, 28 Mar 2008 09:36:19 -0400 Received: from relay1.sgi.com ([192.48.171.29]:39344 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752109AbYC1NgS (ORCPT ); Fri, 28 Mar 2008 09:36:18 -0400 Date: Fri, 28 Mar 2008 08:36:13 -0500 From: Paul Jackson To: "Yinghai Lu" Cc: ying.huang@intel.com, hpa@zytor.com, andi@firstfloor.org, mingo@redhat.com, tglx@linutronix.de, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/4] x86_64 boot -v2: Add linked listof struct setup_data to boot protocol Message-Id: <20080328083613.f058172f.pj@sgi.com> In-Reply-To: <86802c440803272233ved9c1d6w44f8722c85cf4c62@mail.gmail.com> References: <1206672578.13404.21.camel@caritas-dev.intel.com> <86802c440803272233ved9c1d6w44f8722c85cf4c62@mail.gmail.com> Organization: SGI X-Mailer: Sylpheed version 2.2.4 (GTK+ 2.12.0; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org YH wrote: > interesting, that 512nodes/4096 box physics memory is not continuous? If each node board is stuffed with the same amount of RAM, and that amount of RAM is a power of two size, then you are correct that it would be continuous. But if the nodes are stuffed with unequal amounts of RAM, or if its not a power of two, then, because we are doing what Andi figures (breaking the addr into bit fields, for efficient implementation) then we can end up with many holes. -- I won't rest till it's the best ... Programmer, Linux Scalability Paul Jackson 1.940.382.4214