From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751708AbXH2EEJ (ORCPT ); Wed, 29 Aug 2007 00:04:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754640AbXH2EDy (ORCPT ); Wed, 29 Aug 2007 00:03:54 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:53608 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754628AbXH2EDx (ORCPT ); Wed, 29 Aug 2007 00:03:53 -0400 Date: Wed, 29 Aug 2007 06:03:45 +0200 From: Ingo Molnar To: Linus Torvalds Cc: Linux Kernel Mailing List , Len Brown Subject: Re: Linux 2.6.23-rc4, maxcpus=1 regression Message-ID: <20070829040345.GA5260@elte.hu> References: <20070829035554.GA838@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070829035554.GA838@elte.hu> User-Agent: Mutt/1.5.14 (2007-02-12) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.1.7-deb -1.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Ingo Molnar wrote: > maxcpus=1 fails to boot on my T60 laptop, it hangs in early bootup > (right after setting up the local APICs). I bisected it down to this > recent commit: > > | commit 61ec7567db103d537329b0db9a887db570431ff4 > | Author: Len Brown > | Date: Thu Aug 16 03:34:22 2007 -0400 > | > | ACPI: boot correctly with "nosmp" or "maxcpus=0" > > reverting that commit makes the system boot again. I've attached the > .config. i suspect it's due to this: -early_param("maxcpus=", maxcpus); +__setup("maxcpus=", maxcpus); i'm quite sure maxcpus still needs to be an early-param. Ingo