Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932148AbWAPBTk (ORCPT ); Sun, 15 Jan 2006 20:19:40 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932152AbWAPBTk (ORCPT ); Sun, 15 Jan 2006 20:19:40 -0500 Received: from mail.suse.de ([195.135.220.2]:58556 "EHLO mx1.suse.de") by vger.kernel.org with ESMTP id S932148AbWAPBTk (ORCPT ); Sun, 15 Jan 2006 20:19:40 -0500 To: john stultz Cc: Steven Rostedt , Thomas Gleixner , Ingo Molnar , Roger Heflin , "'linux-kernel'" Subject: Re: Dual core Athlons and unsynced TSCs References: <1137168254.7241.32.camel@localhost.localdomain> <1137174463.15108.4.camel@mindpipe> <1137174848.15108.11.camel@mindpipe> <1137178506.15108.38.camel@mindpipe> <1137182991.8283.7.camel@localhost.localdomain> <1137198221.11300.21.camel@cog.beaverton.ibm.com> <1137201012.6727.1.camel@localhost.localdomain> <1137201250.1408.39.camel@mindpipe> <1137201821.11300.30.camel@cog.beaverton.ibm.com> <1137202039.1408.42.camel@mindpipe> <1137202773.11300.37.camel@cog.beaverton.ibm.com> From: Andi Kleen Date: 16 Jan 2006 02:19:27 +0100 In-Reply-To: <1137202773.11300.37.camel@cog.beaverton.ibm.com> Message-ID: User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1133 Lines: 22 john stultz writes: > > With 2.6.15 on x86-64: > If available, alternate timesources (HPET, ACPI PM) will be used if > available on AMD SMP systems. (clock= is i386 only) It would be good if it worked on x86-64 too - simply to unconfuse people. It's somewhere on my todo list, but patches welcome. > With 2.6.15 on i386: > If CONFIG_X86_PM_TIMER is enabled, and available it is the preferred > clocksource over the TSC. Some distros have changed this priority > causing the TSC to be preferred. In these cases clock=pmtmr is needed. One problem is that it is not obvious enough to people that CONFIG_X86_PM_TIMER is really needed for correct timing on many system and they just don't enable it. That is why we got so many bogus reports. I just changed it on x86-64 to be dependent on EMBEDDED, on by default. i386 probably should do this change too. -Andi - 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/