Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754045AbYJAVpF (ORCPT ); Wed, 1 Oct 2008 17:45:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753216AbYJAVox (ORCPT ); Wed, 1 Oct 2008 17:44:53 -0400 Received: from sous-sol.org ([216.99.217.87]:60526 "EHLO sequoia.sous-sol.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752389AbYJAVow (ORCPT ); Wed, 1 Oct 2008 17:44:52 -0400 Date: Wed, 1 Oct 2008 14:43:38 -0700 From: Chris Wright To: Anthony Liguori Cc: Jeremy Fitzhardinge , akataria@vmware.com, "avi@redhat.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. Message-ID: <20081001214338.GD634@sequoia.sous-sol.org> 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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <48E3ECD1.30809@codemonkey.ws> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 619 Lines: 12 * 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.. -- 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/