Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753981AbYJBLaH (ORCPT ); Thu, 2 Oct 2008 07:30:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753032AbYJBL3z (ORCPT ); Thu, 2 Oct 2008 07:29:55 -0400 Received: from mx2.redhat.com ([66.187.237.31]:44666 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752950AbYJBL3y (ORCPT ); Thu, 2 Oct 2008 07:29:54 -0400 Message-ID: <48E4B07C.60605@redhat.com> Date: Thu, 02 Oct 2008 14:29:00 +0300 From: Avi Kivity User-Agent: Thunderbird 2.0.0.16 (X11/20080723) MIME-Version: 1.0 To: Chris Wright CC: Anthony Liguori , Jeremy Fitzhardinge , akataria@vmware.com, Rusty Russell , Gerd Hoffmann , "H. Peter Anvin" , Ingo Molnar , the arch/x86 maintainers , LKML , "Nakajima, Jun" , Daniel Hecht , Zach Amsden , "virtualization@lists.linux-foundation.org" , "kvm@vger.kernel.org" Subject: Re: [RFC] CPUID usage for interaction between Hypervisors and Linux. References: <1222881242.9381.17.camel@alok-dev1> <48E3BBC1.2050607@goop.org> <1222894878.9381.63.camel@alok-dev1> <48E3E8DE.1080602@goop.org> <48E3ECD1.30809@codemonkey.ws> <20081001214338.GD634@sequoia.sous-sol.org> In-Reply-To: <20081001214338.GD634@sequoia.sous-sol.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 824 Lines: 23 Chris Wright wrote: > * Anthony Liguori (anthony@codemonkey.ws) wrote: > >> And arguably, storing TSC frequency in CPUID is a terrible interface >> because the TSC frequency can change any time a guest is entered. It >> > > True for older hardware, newer hardware should fix this. I guess the > point is, the are numbers that are easy to measure incorrectly in guest. > Doesn't justify the whole thing.. > It's not fixed for newer hardware. Larger systems still have multiple tsc frequencies. -- error compiling committee.c: too many arguments to function -- 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/