From owner-freebsd-current Sat Jan 23 12:13:25 1999 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id MAA10992 for freebsd-current-outgoing; Sat, 23 Jan 1999 12:13:25 -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 MAA10982 for ; Sat, 23 Jan 1999 12:13:18 -0800 (PST) (envelope-from dfr@nlsystems.com) Received: from localhost (dfr@localhost) by nlsystems.com (8.9.1/8.8.5) with SMTP id UAA72779; Sat, 23 Jan 1999 20:14:29 GMT Date: Sat, 23 Jan 1999 20:14:29 +0000 (GMT) From: Doug Rabson To: Peter Wemm cc: Matthew Dillon , current@FreeBSD.ORG Subject: Re: panic: found dirty cache page 0xf046f1c0 In-Reply-To: <199901231943.DAA00782@spinner.netplex.com.au> 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 Sun, 24 Jan 1999, Peter Wemm wrote: > > Oh, one other thing that occurred to me.. Under 4.0-current, I regularly > (ie: within 30 seconds of boot) get if_de tranmitter underflows. My > console corruption was happening at the instant that de0 was being > configured with ifconfig. exmh is running to a remote display over that > de0 interface. > > Under Jan 16 3.0-current, I do not get that tranmitter underflow.. One of my alpha boxes has always got a few of these errors when it first transmits a largish packet. It happened under NetBSD and FreeBSD since I bought the machine (about June last year I think). Andrew Gallatin has seen similar errors on OSF1. I think its harmless. > > The only thin I can think of about if_de that's unusual that is VM related > (apart from the complexity of the code) is that it uses configmalloc(). I > wonder if this is somehow setting the scene for the later failures? It's > certainly suspicious that has done strange things when being ifconfig'ed, > including things like trashing the serial console on no less than a dozen > occasions. I can't see where if_de is using contigmalloc(). I thought the bus_dma code in there wasn't used on FreeBSD. -- 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