From owner-freebsd-current Fri Jan 22 03:49:13 1999 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id DAA29509 for freebsd-current-outgoing; Fri, 22 Jan 1999 03:49:13 -0800 (PST) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from nlsystems.com (nlsys.demon.co.uk [158.152.125.33]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id DAA29497 for ; Fri, 22 Jan 1999 03:49:10 -0800 (PST) (envelope-from dfr@nlsystems.com) Received: from localhost (dfr@localhost) by nlsystems.com (8.9.1/8.8.5) with SMTP id LAA59902; Fri, 22 Jan 1999 11:49:31 GMT Date: Fri, 22 Jan 1999 11:49:31 +0000 (GMT) From: Doug Rabson To: "David E. Cross" cc: current@FreeBSD.ORG Subject: Re: mountd In-Reply-To: <199901211554.KAA28454@cs.rpi.edu> 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 Thu, 21 Jan 1999, David E. Cross wrote: > I posted this awhile ago to -questions, but never received a reply. > > We have a number of FreeBSD NFS servers here. Occasionally we need to > change the exports list on the servers and send mountd a SIGHUP. This > leads to a condition that in many ways is much worse than a server reboot. > > What happens is for the duration of mountd reading the exports file it denies > all NFS requests. This has a number of bad effects; 1) any user home and > system directories become unavailable, with the error 'permission denied' 2) > (and this is far worse), any process with a mapped .text segment off of the > NFS server, should it branch to code not in the cache gets immediately killed. > This include user processes that are running from home directories, and system > processes (such as ssh). If we were to reboot the machine it would just > hang those connections until the machine came back, without killing anyone. > > Is there a solution to this problem? I know that none of HP-UX, IRIX, or > Solaris have this problem. Please submit a PR for this (if there isn't one already) so at least it can be tracked. -- 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