From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757355AbYCZGTs (ORCPT ); Wed, 26 Mar 2008 02:19:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752359AbYCZGTk (ORCPT ); Wed, 26 Mar 2008 02:19:40 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:33503 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750737AbYCZGTj (ORCPT ); Wed, 26 Mar 2008 02:19:39 -0400 Date: Wed, 26 Mar 2008 07:19:25 +0100 From: Ingo Molnar To: Mike Travis Cc: Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/2] NR_CPUS: increase maximum NR_CPUS to 4096 Message-ID: <20080326061925.GC18301@elte.hu> References: <20080326014137.934171000@polaris-admin.engr.sgi.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080326014137.934171000@polaris-admin.engr.sgi.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Mike Travis wrote: > Increases the limit of NR_CPUS to 4096 and introduces a boolean called > "MAXSMP" which when set (e.g. "allyesconfig") will set NR_CPUS = 4096 > and NODES_SHIFT = 9 (512). > > I've been running this config (4k NR_CPUS, 512 Max Nodes) on an AMD > box with 2 dual-cores and 4gb memory. I've also successfully booted > it in a simulated 2cpus/1Gb environment. cool! this depends on the cpumask changes to work correctly (i.e. to boot at all), right? Ingo