From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760642AbZEZWxS (ORCPT ); Tue, 26 May 2009 18:53:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759253AbZEZWxF (ORCPT ); Tue, 26 May 2009 18:53:05 -0400 Received: from www.tglx.de ([62.245.132.106]:54231 "EHLO www.tglx.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756253AbZEZWxF (ORCPT ); Tue, 26 May 2009 18:53:05 -0400 Date: Wed, 27 May 2009 00:52:32 +0200 (CEST) From: Thomas Gleixner To: Peter Zijlstra cc: Ingo Molnar , "H. Peter Anvin" , lkml , john stultz Subject: Re: [PATCH] x86: fix cpufreq tsc scaling In-Reply-To: <1243378105.6600.28.camel@laptop> Message-ID: References: <1243378105.6600.28.camel@laptop> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 27 May 2009, Peter Zijlstra wrote: > Subject: x86: fix cpufreq tsc scaling > From: Peter Zijlstra > Date: Wed May 27 00:32:23 CEST 2009 > > For freqency dependent TSCs we only scale the cycles, we do not account > for the discrepancy in absolute value. Add a constant factor so that: > > c1 + f1*cyc == c2 + f2*cyc > > LKML-Reference: > Signed-off-by: Peter Zijlstra > Chucked-on-by: Thomas Gleixner Hey, you misspelled this. I said "Chuckled-on-by" tglx