Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756159Ab1EDXv5 (ORCPT ); Wed, 4 May 2011 19:51:57 -0400 Received: from www.linutronix.de ([62.245.132.108]:32836 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755623Ab1EDXv4 (ORCPT ); Wed, 4 May 2011 19:51:56 -0400 Date: Thu, 5 May 2011 01:51:48 +0200 (CEST) From: Thomas Gleixner To: Andi Kleen cc: Dave Kleikamp , Chris Mason , Peter Zijlstra , Tim Chen , linux-kernel@vger.kernel.org, lenb@kernel.org, paulmck@us.ibm.com Subject: Re: idle issues running sembench on 128 cpus In-Reply-To: Message-ID: References: <4DC1C95B.4040706@gmail.com> <20110504230349.GC2925@one.firstfloor.org> <20110504234241.GD2925@one.firstfloor.org> User-Agent: Alpine 2.02 (LFD 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1065 Lines: 35 On Wed, 4 May 2011, Andi Kleen wrote: > Thomas Gleixner writes: > > > On Thu, 5 May 2011, Andi Kleen wrote: > >> On Thu, May 05, 2011 at 01:29:49AM +0200, Thomas Gleixner wrote: > >> > That makes sense, but merging the timeouts race free will be a real > >> > PITA. > >> > >> For this case one could actually use a spinlock between the siblings. > >> That shouldn't be a problem as long as it's not a global spinlock. > > > > Care to give it a try ? > > Ok, will try tomorrow. > > >> Here's a new patch without the raw. Boots on my Westmere. > > > >> + cpu = raw_smp_processor_id(); > > > > Hmm. quilt refresh perhaps ? I know that feeling :) > > The scp to copy the patch was too slow. Noticed it later and sent a new > one. NP. Happens to hit everybody from time to time :) Thanks, tglx -- 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/