From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934354Ab0EZSze (ORCPT ); Wed, 26 May 2010 14:55:34 -0400 Received: from terminus.zytor.com ([198.137.202.10]:52271 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934167Ab0EZSzc (ORCPT ); Wed, 26 May 2010 14:55:32 -0400 Message-ID: <4BFD6DAD.1000302@zytor.com> Date: Wed, 26 May 2010 11:51:25 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100430 Fedora/3.0.4-2.fc12 Thunderbird/3.0.4 MIME-Version: 1.0 To: Brian Bloniarz CC: john stultz , Dan Magenheimer , Ingo Molnar , Thomas Gleixner , Peter Zijlstra , Andi Kleen , Arjan van de Ven , Venkatesh Pallipadi , chris.mason@oracle.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH] x86: Export tsc related information in sysfs References: <4BF58B59.7080901@athenacr.com> <1274727116.2954.5.camel@localhost.localdomain> <4BFADF9D.9050209@zytor.com 1274733566.2954.73.camel@localhost.localdomain> <3ec7f284-1507-47fb-b5a2-eea29f68c627@default> <4BFAFE17.8060105@zytor.com> <4BFB2902.50308@athenacr.com> <4BFC687A.9040304@athenacr.com> <1274834888.4678.66.camel@localhost.localdomain> <4BFC8C77.7020802@athenacr.com> <1274886299.1759.8.camel@work-vm> <4BFD4629.6040602@athenacr.com> <1274891109.1759.27.camel@work-vm> <4BFD6C2B.4070403@athenacr.com> In-Reply-To: <4BFD6C2B.4070403@athenacr.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/26/2010 11:44 AM, Brian Bloniarz wrote: > On 05/26/2010 12:25 PM, john stultz wrote: >> Brian: is this something the NTPd folks actually want? Has anyone >> checked with them before we hand down the solution from high upon on >> lkml mountain? > > I haven't checked, it's been a while since I dealt with > this problem. The NTP maintainers definitely complain about the > quick TSC calibration code like it's a bug: > (e.g. http://www.mail-archive.com/questions@lists.ntp.org/msg02079.html). > Anyway I'll reach out before I spend any time investing in > a solution that they don't want (and you don't like :). > Yes, Prof. Mills in particular (for those who don't know, he's "Mr. NTP") really gets upset about the way Linux does timekeeping. Unfortunately it's not clear to me that he's willing to work with us as opposed to wanting things to work exactly like BSD, and swive the non-NTP users. -hpa