Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764536AbYAaHHG (ORCPT ); Thu, 31 Jan 2008 02:07:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753670AbYAaHGy (ORCPT ); Thu, 31 Jan 2008 02:06:54 -0500 Received: from rv-out-0910.google.com ([209.85.198.186]:5972 "EHLO rv-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753651AbYAaHGx (ORCPT ); Thu, 31 Jan 2008 02:06:53 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=XKsAbJnF+vfXxKp6EKd2+6zUtIoFmdHU0nu6zIZbf0ZqBYU77WL9/0xhsm8chzW3jKgDraNKRJ8J/3G9KkPD8wZOQoyXNGYJhHG6+UpZ2lYbhzuSVOlq/qiH8pO8QsIE6DdtvMrv2HqRKGWVQvjR9xKLvkHRxRFbGnvWVGPRxH0= Message-ID: <86802c440801302306g2a1ae11h52b883eed79b7e96@mail.gmail.com> Date: Wed, 30 Jan 2008 23:06:53 -0800 From: "Yinghai Lu" To: "H. Peter Anvin" , "Eric W. Biederman" , "Andi Kleen" Subject: Re: system without RAM on node0 boot fail Cc: "Christoph Lameter" , "Ingo Molnar" , linux-kernel@vger.kernel.org In-Reply-To: <47A16616.9070606@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <200801302026.27130.yinghai.lu@sun.com> <200801302102.09510.yinghai.lu@sun.com> <47A16616.9070606@zytor.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 830 Lines: 22 On Jan 30, 2008 10:09 PM, H. Peter Anvin wrote: > Christoph Lameter wrote: > > x86 supports booting from a node without RAM? it is a two sockets system. only 4G RAM installed on node1. > > From the looks of it I would say he probably has the boot node numbered 1. > > The e820 map is also "interesting" - doesn't list the first 256 bytes, > which corresponds to the first quarter(!) of the real-mode exception table. i kexec that from 2.6.24 (with discontinuous and slab) so that e820 is passed by kexec from first kernel. normal pxeboot will have start for 0. YH -- 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/