From owner-freebsd-current Fri Mar 14 08:12:43 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id IAA25427 for current-outgoing; Fri, 14 Mar 1997 08:12:43 -0800 (PST) Received: from Kitten.mcs.com (Kitten.mcs.com [192.160.127.90]) by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id IAA25420 for ; Fri, 14 Mar 1997 08:12:39 -0800 (PST) Received: from Jupiter.Mcs.Net (karl@Jupiter.mcs.net [192.160.127.88]) by Kitten.mcs.com (8.8.5/8.8.2) with ESMTP id KAA22823; Fri, 14 Mar 1997 10:12:38 -0600 (CST) Received: (from karl@localhost) by Jupiter.Mcs.Net (8.8.5/8.8.2) id KAA15050; Fri, 14 Mar 1997 10:12:33 -0600 (CST) Message-ID: <19970314101233.31910@Jupiter.Mcs.Net> Date: Fri, 14 Mar 1997 10:12:33 -0600 From: Karl Denninger To: Terry Lambert Cc: Karl Denninger , current@freebsd.org Subject: Re: Yikes! Current / Lite2 kernel has MAJOR NFS client problems References: <19970309145605.07984@Jupiter.Mcs.Net> <199703102233.PAA23787@phaeton.artisoft.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.64 In-Reply-To: <199703102233.PAA23787@phaeton.artisoft.com>; from Terry Lambert on Mon, Mar 10, 1997 at 03:33:53PM -0700 Sender: owner-current@freebsd.org X-Loop: FreeBSD.org Precedence: bulk On Mon, Mar 10, 1997 at 03:33:53PM -0700, Terry Lambert wrote: > > Be EXTREMELY careful if you try to run a LITE2 kernel in an NFS environment. > > > > As it sits right now, you'll get tons of panics out of "page not present" > > faults in the event any executable is grabbed over NFS. > > > > I'll start looking at this if someone has an idea where it would be coming > > from. Is this a "dirty page" problem in that the page isn't being fetched > > when it should be? > > Look at the NFS differences for the pre-merge code vs. the Lite code > that should be the first rev in the tree. Basically, the cache > unification process has changes the FS/buffer interface, and you > need to propagate some stuff down to the FS that NFS is a client > of for it to be truly happy. The diff should pinpoint it for you. > > > Terry Lambert > terry@lambert.org I'll have to take a look at it -- basically, you get a "page not present" panic within minutes (literally) using the LITE2-merged stuff if you mount a directory and run executables off that mount point. Until this is fixed DO NOT mount executable directories from a remote NFS server. This is a serious problem and will lead to resets within 2-10 minutes! -- -- Karl Denninger (karl@MCS.Net)| MCSNet - The Finest Internet Connectivity http://www.mcs.net/~karl | T1's from $600 monthly to FULL DS-3 Service | 99 Analog numbers, 77 ISDN, Web servers $75/mo Voice: [+1 312 803-MCS1 x219]| Email to "info@mcs.net" WWW: http://www.mcs.net/ Fax: [+1 312 803-4929] | 2 FULL DS-3 Internet links; 400Mbps B/W Internal