Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751541AbVJTPDL (ORCPT ); Thu, 20 Oct 2005 11:03:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751580AbVJTPDK (ORCPT ); Thu, 20 Oct 2005 11:03:10 -0400 Received: from gateway-1237.mvista.com ([12.44.186.158]:5619 "EHLO dhcp153.mvista.com") by vger.kernel.org with ESMTP id S1751560AbVJTPDJ (ORCPT ); Thu, 20 Oct 2005 11:03:09 -0400 Date: Thu, 20 Oct 2005 08:02:26 -0700 (PDT) From: Daniel Walker To: Steven Rostedt cc: Thomas Gleixner , Ingo Molnar , ganzinger@mvista.com, linux-kernel@vger.kernel.org Subject: Re: Ktimer / -rt9 (+custom) monotonic_clock going backwards. In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 818 Lines: 20 On Thu, 20 Oct 2005, Steven Rostedt wrote: > > Yes, but that shouldn't make a difference. NTP can slow down or speed up > the clock, but it should never make it go backwards. Especially for a > monotonic clock (as the name suggests). It looks like if ntp_adj held a big negative number you might end up with a smaller output . ntp_adj is signed too .. I don't know how ntp_adj is set though . I thought I remember George Anzinger speculating that ntp could cause the time to backwards , that's why I brought it up. Maybe if he's read he can clue us in .. Daniel - 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/