From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753486AbdA3NG3 (ORCPT ); Mon, 30 Jan 2017 08:06:29 -0500 Received: from Galois.linutronix.de ([146.0.238.70]:58839 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752951AbdA3NEu (ORCPT ); Mon, 30 Jan 2017 08:04:50 -0500 Date: Mon, 30 Jan 2017 14:04:46 +0100 (CET) From: Thomas Gleixner To: Henning Schild cc: LKML , Ingo Molnar , Peter Zijlstra , Borislav Petkov , Yinghai Lu Subject: Re: [3/8] x86/tsc: Store and check TSC ADJUST MSR In-Reply-To: <20170130131301.7ddae08d@md1em3qc> Message-ID: References: <20161119134017.655323776@linutronix.de> <20170127143632.4f56d927@md1em3qc> <20170130131301.7ddae08d@md1em3qc> User-Agent: Alpine 2.20 (DEB 67 2015-01-07) 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 Mon, 30 Jan 2017, Henning Schild wrote: > On Mon, 30 Jan 2017 11:20:25 +0100 > Thomas Gleixner wrote: > > There is nothing you can ever be sure about, but I doubt that the > > ADJUST MSR is going to vanish. > > That sounds very much like i expected. But assuming the MSR has come to > stay, the problem should be solved for recent kernels and Intel-CPUs. > > The AMD-Manual from 12/16 does not mention that MSR. I do not have > access to an AMD machine. But i can only assume that bigger machines > also suffer from async TSCs and basically all fall back to HPET. Borislav?