From owner-freebsd-current Fri Dec 17 1:42:28 1999 Delivered-To: freebsd-current@freebsd.org Received: from herring.nlsystems.com (nlsys.demon.co.uk [158.152.125.33]) by hub.freebsd.org (Postfix) with ESMTP id 58D6C14FA6 for ; Fri, 17 Dec 1999 01:42:24 -0800 (PST) (envelope-from dfr@nlsystems.com) Received: from salmon.nlsystems.com (salmon.nlsystems.com [10.0.0.3]) by herring.nlsystems.com (8.9.3/8.8.8) with ESMTP id JAA46687; Fri, 17 Dec 1999 09:52:20 GMT (envelope-from dfr@nlsystems.com) Date: Fri, 17 Dec 1999 09:52:20 +0000 (GMT) From: Doug Rabson To: Matthew Dillon Cc: Andrew Gallatin , freebsd-current@freebsd.org Subject: Re: Serious server-side NFS problem In-Reply-To: <199912160600.WAA47882@apollo.backplane.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Wed, 15 Dec 1999, Matthew Dillon wrote: > Here's a general update on this bug report to -current. It took all day > but I was finally able to reproduce Andrew's bug. > > You guys are going to *love* this. > > NFS uses the kernel 'boottime' structure to generate its version id. > Now normally you might believe that this structure, once set, will > never change. The authors of NFS certainly make that assumption! > > No such luck. If you happen to be running, oh, xntpd for example, > the kernel adjusts the boottime structure to take into account time > changes, including PLL changes so, in fact, the boottime structure > can change quite often - once each tick, in fact. Nice catch, Matt. -- Doug Rabson Mail: dfr@nlsystems.com Nonlinear Systems Ltd. Phone: +44 181 442 9037 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message