Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932840AbWKJKhM (ORCPT ); Fri, 10 Nov 2006 05:37:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932842AbWKJKhM (ORCPT ); Fri, 10 Nov 2006 05:37:12 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:4490 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S932837AbWKJKhK (ORCPT ); Fri, 10 Nov 2006 05:37:10 -0500 Subject: Re: [patch 13/19] GTOD: Mark TSC unusable for highres timers From: Arjan van de Ven To: Andi Kleen Cc: john stultz , Thomas Gleixner , Andrew Morton , LKML , Ingo Molnar , Len Brown , Roman Zippel In-Reply-To: <200611101130.51528.ak@suse.de> References: <20061109233030.915859000@cruncher.tec.linutronix.de> <200611100610.13957.ak@suse.de> <1163154519.3138.665.camel@laptopd505.fenrus.org> <200611101130.51528.ak@suse.de> Content-Type: text/plain Organization: Intel International BV Date: Fri, 10 Nov 2006 11:37:05 +0100 Message-Id: <1163155026.3138.673.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: 1169 Lines: 27 On Fri, 2006-11-10 at 11:30 +0100, Andi Kleen wrote: > On Friday 10 November 2006 11:28, Arjan van de Ven wrote: > > On Fri, 2006-11-10 at 06:10 +0100, Andi Kleen wrote: > > > Very sad. This will make a lot of people unhappy, even to the point > > > where they might prefer disabling noidlehz over super slow gettimeofday. > > > I assume you at least have a suitable command line option for that, right? > > > > > > Can we get a summary on which systems the TSC is considered unstable? > > > > the part where it stops in idle... > > That is handled by if (intel && C3 available) disable I'm not so sure it doesn't stop on AMD; the ACPI spec at least allows it; just that I've seen few AMD CPUs that actually have C3, but that could be a matter of time. -- 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/