From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755317AbWKMS1O (ORCPT ); Mon, 13 Nov 2006 13:27:14 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755318AbWKMS1N (ORCPT ); Mon, 13 Nov 2006 13:27:13 -0500 Received: from mga07.intel.com ([143.182.124.22]:27690 "EHLO azsmga101.ch.intel.com") by vger.kernel.org with ESMTP id S1755317AbWKMS1N (ORCPT ); Mon, 13 Nov 2006 13:27:13 -0500 X-ExtLoop1: 1 X-IronPort-AV: i="4.09,418,1157353200"; d="scan'208"; a="145524636:sNHT529171580" Date: Mon, 13 Nov 2006 10:03:52 -0800 From: "Siddha, Suresh B" To: Ingo Molnar Cc: Andi Kleen , "Siddha, Suresh B" , Andrew Morton , linux-kernel@vger.kernel.org, ashok.raj@intel.com Subject: Re: [patch] genapic: optimize & fix APIC mode setup Message-ID: <20061113100352.C17720@unix-os.sc.intel.com> References: <20061111151414.GA32507@elte.hu> <200611131529.46464.ak@suse.de> <20061113150415.GA20321@elte.hu> <200611131710.13285.ak@suse.de> <20061113163216.GA3480@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <20061113163216.GA3480@elte.hu>; from mingo@elte.hu on Mon, Nov 13, 2006 at 05:32:16PM +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Nov 13, 2006 at 05:32:16PM +0100, Ingo Molnar wrote: > * Andi Kleen wrote: > > Ok assuming temporarily it's a bug, how would you want to fix it? > > for that i'd have to know the bug, and this is the third time i'm asking > about specifics :-) (The URL that was given in the thread was about a > chipset bug regarding incompatibility with clustered-APIC mode - my > patch in fact - because it switches small systems to use logical flat > mode always - solves that kind of regression too.) Not really. That chipset belongs to a MP platform and with your proposed patch, we will endup using clustered APIC mode and will hit the issue(in the presence of cpu hotplug) mentioned in that URL. We will find out if this behavior is specific to this single chipset and getback to you. thanks, suresh