From owner-freebsd-questions Sat Aug 8 15:47:39 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id PAA03939 for freebsd-questions-outgoing; Sat, 8 Aug 1998 15:47:39 -0700 (PDT) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from smtp.infozoo.com (smtp.INFOZOO.com [12.2.96.18]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id PAA03934 for ; Sat, 8 Aug 1998 15:47:36 -0700 (PDT) (envelope-from Les.LaCroix@Carleton.edu) Received: (qmail 4440 invoked from network); 8 Aug 1998 22:48:08 -0000 Received: from unknown (HELO MOCHAJAVA) (12.2.96.21) by smtp.infozoo.com with SMTP; 8 Aug 1998 22:48:08 -0000 Date: Sat, 08 Aug 1998 17:48:13 -0500 From: "Les LaCroix" To: "Greg Lehey" , "Thomas David Rivers" cc: freebsd-questions@FreeBSD.ORG Subject: followup: page fault in kernel mode Message-ID: <655360902.902598493@MOCHAJAVA> X-Mailer: Mulberry (Win32) [1.3.3, s/n S-397003] MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG [A recap of the story: 2.2.6 and 2.2.7 panicked with a page fault in kernel mode on an AMD-K6 300 w/ 100 MHz EPoX mbrd, 128 Mb ECC memory, Intel EtherExpress Pro PCI NIC, 7200 RPM Seagate UltraIDE hard drive, Adaptec 1520 ISA SCSI adapter. The fault was a read fault to the address in the instruction pointer. gdk -k was able to trace back only a few stack frames, through the call stack for the system traps generated by the page fault but no further. I concluded that something was munging the stack, corrupting a return address. (Note that the faulty address was always the same.) Removing the Adaptec 1520 dramatically reduced the frequency of the panics, but did not eliminate them.] I reinstalled the Adaptec 1520 and retrograded back to 2.2.5 a week ago, and have been running around the clock since then with no panics. The machine is up and in production now, filling in for a terribly slow Sparcstation I was previously sharing. If someone would be interested in looking at a crash dump, I can try to tempoarily re-install a 2.2.6 kernel. I need a good excuse to do a large backup anyway. :) But I don't really have the expertise to dig into it myself, nor can I afford to let the machine crash several times daily while I'm trying to solve the problem. Thanks again. ----- Les LaCroix, Sr. Systems/Network Mgr, Carleton College To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message