From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ashok Raj Subject: Re: 2.6.16rc5 'found' an extra CPU. Date: Wed, 1 Mar 2006 19:52:19 -0800 Message-ID: <20060301195218.A3539@unix-os.sc.intel.com> References: <20060301224647.GD1440@redhat.com> <200603020155.46534.ak@suse.de> <20060302011959.GC19755@redhat.com> <200603020238.31639.ak@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from fmr22.intel.com ([143.183.121.14]:54440 "EHLO scsfmr002.sc.intel.com") by vger.kernel.org with ESMTP id S1750792AbWCBDwa (ORCPT ); Wed, 1 Mar 2006 22:52:30 -0500 Content-Disposition: inline In-Reply-To: <200603020238.31639.ak@suse.de>; from ak@suse.de on Thu, Mar 02, 2006 at 02:38:31AM +0100 Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Andi Kleen Cc: Dave Jones , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Ashok Raj 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. -- Cheers, Ashok Raj - Open Source Technology Center