Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757461AbYHKUAP (ORCPT ); Mon, 11 Aug 2008 16:00:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753091AbYHKT76 (ORCPT ); Mon, 11 Aug 2008 15:59:58 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:57829 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751201AbYHKT75 (ORCPT ); Mon, 11 Aug 2008 15:59:57 -0400 Date: Mon, 11 Aug 2008 21:59:39 +0200 From: Ingo Molnar To: Jeff Chua Cc: Linus Torvalds , Yinghai Lu , David Miller , Max Krasnyansky , Li Zefan , lkml Subject: Re: 2.6.27rc1 cannot boot more than 8CPUs Message-ID: <20080811195939.GA16716@elte.hu> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) 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 Content-Length: 1256 Lines: 32 * Jeff Chua wrote: > On Wed, Aug 6, 2008 at 2:42 PM, Jeff Chua wrote: > > On Wed, Aug 6, 2008 at 2:01 PM, Linus Torvalds > > wrote: > >> One trivial thing to try would be to just bisect it. I assume 2.6.26 is > > Bisecting now. > > Thanks to all the great helpful suggestions from everyone, and this > turns out that I just need to enable the following switches, so I > didn't bisect further, and since it's first machine that I've tried > with more than 8 CPUs so I wasn't sure whether 2.6.16 has the same > problem, but if you wish, I could give 2.6.16 a try. > > > CONFIG_X86_GENERICARCH=y > > CONFIG_X86_BIGSMP=y > > Thank you all for the great linux kernel! i still consider a silent boot hang a bug we need to fix. bigsmp might be required to have all cpus available on your box, but the kernel is still supposed to transparently fall back to less CPUs (and print a warning) if it cannot do that. Ingo -- 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/