Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1946478AbWKJLOV (ORCPT ); Fri, 10 Nov 2006 06:14:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1946504AbWKJLOV (ORCPT ); Fri, 10 Nov 2006 06:14:21 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:30919 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S1946478AbWKJLOV (ORCPT ); Fri, 10 Nov 2006 06:14:21 -0500 Date: Fri, 10 Nov 2006 12:13:16 +0100 From: Ingo Molnar To: Arjan van de Ven Cc: Andi Kleen , Andrew Morton , tglx@linutronix.de, john stultz , LKML , Len Brown , Roman Zippel Subject: Re: [patch 13/19] GTOD: Mark TSC unusable for highres timers Message-ID: <20061110111316.GB4780@elte.hu> References: <20061109233030.915859000@cruncher.tec.linutronix.de> <20061110011336.008840cf.akpm@osdl.org> <1163154958.3138.671.camel@laptopd505.fenrus.org> <200611101147.26081.ak@suse.de> <1163156158.3138.677.camel@laptopd505.fenrus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1163156158.3138.677.camel@laptopd505.fenrus.org> User-Agent: Mutt/1.4.2.2i X-ELTE-SpamScore: -2.8 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.8 required=5.9 tests=ALL_TRUSTED,AWL,BAYES_50 autolearn=no SpamAssassin version=3.0.3 -3.3 ALL_TRUSTED Did not pass through any untrusted hosts 0.5 BAYES_50 BODY: Bayesian spam probability is 40 to 60% [score: 0.4998] -0.0 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 805 Lines: 20 * Arjan van de Ven wrote: > > Most systems don't have C3 right now. And on those that have > > (laptops) it tends to be not that critical because they normally > > don't run workload where gettimeofday() is really time critical (and > > nobody expects them to be particularly fast anyways) > > and that got changed when the blade people decided to start using > laptop processors ...... and some systems disable the lapic in C2 already: BIOSs started doing lowlevel-C3 in their C2 functionality and lie to the OS about it. Ingo - 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/