From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755818Ab2CFQsk (ORCPT ); Tue, 6 Mar 2012 11:48:40 -0500 Received: from mx.scalarmail.ca ([98.158.95.75]:6077 "EHLO ironport-01.sms.scalar.ca" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755541Ab2CFQsj (ORCPT ); Tue, 6 Mar 2012 11:48:39 -0500 Date: Tue, 6 Mar 2012 11:48:35 -0500 From: Nick Bowler To: Sasha Levin Cc: Jeff Moyer , linux-kernel@vger.kernel.org Subject: Re: the maxcpus= boot parameter broke somewhere along the line Message-ID: <20120306164835.GA26094@elliptictech.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Organization: Elliptic Technologies Inc. User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2012-03-06 17:17 +0200, Sasha Levin wrote: > On Tue, Mar 6, 2012 at 4:59 PM, Jeff Moyer wrote: > > When booting my machine with maxcpus=1, it seems to be ignored with > > 3.3.0-rc3.  I know that 3.1.0-rc3 works fine, but I haven't had time to > > track it down any further than that.  I've attached the dmesg from my > > machine.  Let me know if there is any other information that would help > > in solving this. > > [snip] > > > Brought up 1 CPUs > > Total of 1 processors activated (4256.06 BogoMIPS). > > Looks like it indeed brings up only one CPU, what's the problem there? If you scroll further down it seems that the remaining CPUs are brought online near the end of the boot? [...] udev: starting version 147 SMP alternatives: switching to SMP code WARNING! power/level is deprecated; use power/control instead EDAC MC: Ver: 2.1.0 Booting Node 0 Processor 3 APIC 0x3 smpboot cpu 3: start_ip = 9a000 EDAC MC0: Giving out device to 'i3200_edac' 'i3200': DEV 0000:00:00.0 NMI watchdog enabled, takes one hw-pmu counter. Booting Node 0 Processor 2 APIC 0x1 smpboot cpu 2: start_ip = 9a000 NMI watchdog enabled, takes one hw-pmu counter. Booting Node 0 Processor 1 APIC 0x2 smpboot cpu 1: start_ip = 9a000 NMI watchdog enabled, takes one hw-pmu counter. Cheers, -- Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)