Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750704AbWJ0VsR (ORCPT ); Fri, 27 Oct 2006 17:48:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750705AbWJ0VsR (ORCPT ); Fri, 27 Oct 2006 17:48:17 -0400 Received: from zrtps0kn.nortel.com ([47.140.192.55]:64390 "EHLO zrtps0kn.nortel.com") by vger.kernel.org with ESMTP id S1750704AbWJ0VsR (ORCPT ); Fri, 27 Oct 2006 17:48:17 -0400 Message-ID: <45427E91.2000402@nortel.com> Date: Fri, 27 Oct 2006 15:48:01 -0600 From: "Chris Friesen" User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.7) Gecko/20050427 Red Hat/1.7.7-1.1.3.4 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Lee Revell CC: Andi Kleen , linux-kernel , john stultz Subject: Re: AMD X2 unsynced TSC fix? References: <1161969308.27225.120.camel@mindpipe> <200610271335.10178.ak@suse.de> <1161981682.27225.184.camel@mindpipe> In-Reply-To: <1161981682.27225.184.camel@mindpipe> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 27 Oct 2006 21:48:04.0359 (UTC) FILETIME=[94BF4970:01C6FA11] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 640 Lines: 19 Lee Revell wrote: > What exactly does that AMD patch do? "...by periodically adjusting the core time-stamp-counters, so that they are synchronized." It sounds like they just periodically write a new value to the TSC. Presumably they set the "slower" one equal to the "faster" one. You'd likely still have windows where time might run backwards, but it would be better than nothing. Chris - 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/