From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Jones Subject: Re: 2.6.16rc5 'found' an extra CPU. Date: Wed, 1 Mar 2006 23:11:54 -0500 Message-ID: <20060302041154.GA31863@redhat.com> References: <20060301224647.GD1440@redhat.com> <200603020155.46534.ak@suse.de> <20060302011959.GC19755@redhat.com> <200603020238.31639.ak@suse.de> <20060301195218.A3539@unix-os.sc.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mx1.redhat.com ([66.187.233.31]:3018 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S1751136AbWCBEMB (ORCPT ); Wed, 1 Mar 2006 23:12:01 -0500 Content-Disposition: inline In-Reply-To: <20060301195218.A3539@unix-os.sc.intel.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Ashok Raj Cc: Andi Kleen , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org On Wed, Mar 01, 2006 at 07:52:19PM -0800, Ashok Raj wrote: > On Thu, Mar 02, 2006 at 02:38:31AM +0100, Andi Kleen wrote: > > > > > ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled) > > > Processor #0 15:5 APIC version 16 > > > ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled) > > > Processor #1 15:5 APIC version 16 > > > ACPI: LAPIC (acpi_id[0x03] lapic_id[0x82] disabled) > > > ACPI: LAPIC (acpi_id[0x04] lapic_id[0x83] disabled) > > > > It's because of the two disabled CPUs. We decreed at some point > > that disabled CPUs mean hotpluggable CPUs. But it's doing > > this for some time so you probably only noticed now. > > > > All is ok. Sorry for blaming you wrongly, Ashok. > > > Phew!.. > > The ACPI hotplug code isnt in 2.6.15-rc* yet. It should be in the next > -mm when Andrew rolls the next mm. > > But the 3 entries seem weird, we should only see 2 sysfs entries in > /sys/devices/system/cpu and just 2 entries in proc/acpi/processor as well. sysfs gets it right. (23:11:01:davej@nemesis:~)$ ls /sys/devices/system/cpu/ cpu0/ cpu1/ (23:11:07:davej@nemesis:~)$ ls /proc/acpi/processor/ CPU1/ CPU2/ CPU3/ (23:11:11:davej@nemesis:~)$ Dave