From owner-freebsd-current Thu Apr 10 06:09:06 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id GAA04116 for current-outgoing; Thu, 10 Apr 1997 06:09:06 -0700 (PDT) Received: from dyson.iquest.net (dyson.iquest.net [198.70.144.127]) by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id GAA04107; Thu, 10 Apr 1997 06:09:00 -0700 (PDT) Received: (from root@localhost) by dyson.iquest.net (8.8.4/8.6.9) id IAA00366; Thu, 10 Apr 1997 08:08:52 -0500 (EST) From: "John S. Dyson" Message-Id: <199704101308.IAA00366@dyson.iquest.net> Subject: Re: NFS/mmap freeze in 2.2R In-Reply-To: <199704100622.XAA19967@newport.ece.uci.edu> from Steven Wallace at "Apr 9, 97 11:22:15 pm" To: swallace@ece.uci.edu (Steven Wallace) Date: Thu, 10 Apr 1997 08:08:52 -0500 (EST) Cc: bugs@freebsd.org, current@freebsd.org Reply-To: dyson@freebsd.org X-Mailer: ELM [version 2.4ME+ PL31 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-current@freebsd.org X-Loop: FreeBSD.org Precedence: bulk > > I have discovered how to freeze the system over an NFS mounted filesystem. > If you map a file over NFS read/write and shared, write > to the area in memory, and then have another program read that nfs file, > the system will freeze. The freeze is kindof wierd though. > It appears that the kernel is still running somehow. > I can change the sysconts vty's but typing and all other processes > are frozen and not running. > Sounds like a recursive VFS locking problem or somesuch. Thanks for the report, and will look at it ASAP. John