Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1946384AbWKJK4O (ORCPT ); Fri, 10 Nov 2006 05:56:14 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1946388AbWKJK4O (ORCPT ); Fri, 10 Nov 2006 05:56:14 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:17051 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S1946384AbWKJK4N (ORCPT ); Fri, 10 Nov 2006 05:56:13 -0500 Subject: Re: [patch 13/19] GTOD: Mark TSC unusable for highres timers From: Arjan van de Ven To: Andi Kleen Cc: Andrew Morton , Ingo Molnar , tglx@linutronix.de, john stultz , LKML , Len Brown , Roman Zippel In-Reply-To: <200611101147.26081.ak@suse.de> References: <20061109233030.915859000@cruncher.tec.linutronix.de> <20061110011336.008840cf.akpm@osdl.org> <1163154958.3138.671.camel@laptopd505.fenrus.org> <200611101147.26081.ak@suse.de> Content-Type: text/plain Organization: Intel International BV Date: Fri, 10 Nov 2006 11:55:58 +0100 Message-Id: <1163156158.3138.677.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.8.1.1 (2.8.1.1-3.fc6) Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 930 Lines: 26 > > Do we? Where? AFAIK we just do some resetting after cpu frequency > changes, but on C3 TSC is just disabled globally. > > That is better than it sounds. is it? > > 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 ...... -- if you want to mail me at work (you don't), use arjan (at) linux.intel.com Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org - 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/