Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754770Ab0FCNlh (ORCPT ); Thu, 3 Jun 2010 09:41:37 -0400 Received: from nlpi129.sbcis.sbc.com ([207.115.36.143]:58137 "EHLO nlpi129.prodigy.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753477Ab0FCNlg (ORCPT ); Thu, 3 Jun 2010 09:41:36 -0400 Date: Thu, 3 Jun 2010 08:34:20 -0500 (CDT) From: Christoph Lameter X-X-Sender: cl@router.home To: Pekka Enberg cc: Randy Dunlap , Giangiacomo Mariotti , Bill Davidsen , linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86 maintainers , Ingo Molnar , "H. Peter Anvin" Subject: Re: Possible bug in 2.6.34 slub In-Reply-To: Message-ID: References: <20100531165528.35a323fb.rdunlap@xenotime.net> <4C047CF9.9000804@tmr.com> <20100601123959.747228c6.rdunlap@xenotime.net> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 977 Lines: 23 On Thu, 3 Jun 2010, Pekka Enberg wrote: > On Tue, Jun 1, 2010 at 10:48 PM, Christoph Lameter > wrote: > > On Tue, 1 Jun 2010, Randy Dunlap wrote: > > > >> > >>> My cpu is an I7 920, so it has 4 cores and there's hyperthreading > >> > >>> enabled, so there are 8 logical cpus. Is this a bug? > > > > Yes its a bug in the arch code or BIOS. The system configuration tells us > > that there are more possible cpus and therefore the system prepares for > > the additional cpus to be activated at some later time. > > I guess we should CC x86 maintainers then! Its also a know BIOS problem with Dell f.e. They often indicate more potential cpus even if this particular hw configuration cannot do cpu hotplug. -- 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/