From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934491AbYD1Niz (ORCPT ); Mon, 28 Apr 2008 09:38:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S934271AbYD1Nig (ORCPT ); Mon, 28 Apr 2008 09:38:36 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:50983 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934006AbYD1Nig (ORCPT ); Mon, 28 Apr 2008 09:38:36 -0400 Date: Mon, 28 Apr 2008 15:38:06 +0200 From: Ingo Molnar To: Pavel Machek Cc: Mike Travis , Andrew Morton , Thomas Gleixner , "H. Peter Anvin" , linux-kernel@vger.kernel.org Subject: Re: [PATCH 01/11] x86: Modify Kconfig to allow up to 4096 cpus Message-ID: <20080428133806.GC3973@elte.hu> References: <20080426001548.829332000@polaris-admin.engr.sgi.com> <20080426001549.014201000@polaris-admin.engr.sgi.com> <20080427103933.GA5168@ucw.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080427103933.GA5168@ucw.cz> 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 * Pavel Machek wrote: > On Fri 2008-04-25 17:15:49, Mike Travis wrote: > > * Increase the limit of NR_CPUS to 4096 and introduce a boolean > > called "MAXSMP" which when set (e.g. "allyesconfig"), will set > > NR_CPUS = 4096 and NODES_SHIFT = 9 (512). > > Why is redundant option 'maxsmp' a good idea? because this way randconfig can trigger it and can configure all the otherwise randconfig-invisible [or just plain unlikely] numerics and options up to their max. I found 2-3 "large box" bugs via that way already. Ingo