Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752039AbaGVKjG (ORCPT ); Tue, 22 Jul 2014 06:39:06 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:60333 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750737AbaGVKjE (ORCPT ); Tue, 22 Jul 2014 06:39:04 -0400 Date: Tue, 22 Jul 2014 12:38:57 +0200 From: Peter Zijlstra To: Bruno Wolff III Cc: Dietmar Eggemann , Josh Boyer , "mingo@redhat.com" , "linux-kernel@vger.kernel.org" , "H. Peter Anvin" , Thomas Gleixner Subject: Re: Scheduler regression from caffcdd8d27ba78730d5540396ce72ad022aff2c Message-ID: <20140722103857.GK12054@laptop.lan> References: <20140717123502.GL19379@twins.programming.kicks-ass.net> <20140718053449.GA2039@wolff.to> <20140718101633.GP9918@twins.programming.kicks-ass.net> <20140718130126.GA2401@wolff.to> <20140718141648.GE20603@laptop.programming.kicks-ass.net> <20140718145040.GG12054@laptop.lan> <20140718161602.GH12054@laptop.lan> <20140721163528.GA10433@wolff.to> <20140721165212.GO3935@laptop> <20140722094740.GJ12054@laptop.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140722094740.GJ12054@laptop.lan> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 22, 2014 at 11:47:40AM +0200, Peter Zijlstra wrote: > On Mon, Jul 21, 2014 at 06:52:12PM +0200, Peter Zijlstra wrote: > > On Mon, Jul 21, 2014 at 11:35:28AM -0500, Bruno Wolff III wrote: > > > Is there more I can do to help with this now? Or should I just wait for > > > patches to test? > > > > Yeah, sorry, was wiped out today. I'll go stare harder at the P4 > > topology setup code tomorrow. Something fishy there. > > Does this make your machine boot again (while giving an error)? > > It tries to robustify the topology setup a bit, crashing on crap input > should be avoided if possible of course. > > I'll go stare at the x86/P4 topology code like promised. Could you provide the output of cpuid and cpuid -r for your machine? This code is magic and I've no idea what your machine is telling it to do :/ -- 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/