Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161824AbWKOWFs (ORCPT ); Wed, 15 Nov 2006 17:05:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161827AbWKOWFs (ORCPT ); Wed, 15 Nov 2006 17:05:48 -0500 Received: from dvhart.com ([64.146.134.43]:34457 "EHLO dvhart.com") by vger.kernel.org with ESMTP id S1161824AbWKOWFs (ORCPT ); Wed, 15 Nov 2006 17:05:48 -0500 Message-ID: <455B8F3A.6030503@mbligh.org> Date: Wed, 15 Nov 2006 14:05:46 -0800 From: Martin Bligh User-Agent: Thunderbird 1.5.0.5 (X11/20060728) MIME-Version: 1.0 To: Christoph Lameter Cc: Christian Krafft , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [patch 2/2] enables booting a NUMA system where some nodes have no memory References: <20061115193049.3457b44c@localhost> <20061115193437.25cdc371@localhost> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 841 Lines: 26 Christoph Lameter wrote: > On Wed, 15 Nov 2006, Christian Krafft wrote: > >> When booting a NUMA system with nodes that have no memory (eg by limiting memory), >> bootmem_alloc_core tried to find pages in an uninitialized bootmem_map. > > Why should we support nodes with no memory? If a node has no memory then > its processors and other resources need to be attached to the nearest node > with memory. > > AFAICT The primary role of a node is to manage memory. A node is an arbitrary container object containing one or more of: CPUs Memory IO bus It does not have to contain memory. M. - 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/