Date: Thu, 13 Aug 1998 23:51:54 -0700 (PDT) From: mikeg@hoflink.com To: freebsd-gnats-submit@FreeBSD.ORG Subject: kern/7611: custom-builtkernel causes fatal trap 12: page fault while in kernel mode Message-ID: <199808140651.XAA04532@hub.freebsd.org>
next in thread | raw e-mail | index | archive | help
>Number: 7611 >Category: kern >Synopsis: custom-builtkernel causes fatal trap 12: page fault while in kernel mode >Confidential: no >Severity: critical >Priority: high >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri Aug 14 00:00:01 PDT 1998 >Last-Modified: >Originator: Michael Graziano >Organization: >Release: 2.2.7-RELEASE >Environment: FreeBSD 2.2.7-RELEASE FreeBSD 2.2.7-RELEASE #0: Thu Aug 13 21:22:28 EDT 1998 root@:/usr/src/sys/compile/BEAST i386 >Description: This is *LONG*, take my apology now :) Using a custom-built kernel, when attempting to shut the system down or reboot it, the machine dies with Fatal trap 12: page fault while in kernel mode The fault code is always the same also: Supervisor read: Page not present It leaves no dumps behind to examine. This error also occours randomly while the system is running. My hardware is (permission to laugh as loud as you want): a Cyrix 486/40 (SX), 8 megs of ram with 81M swap space (configured on /dev/wd1s1b), 2400bps modem (/dev/sio2) and a Tseng ET4000 SVGA vid board. The first hard drive is a Maxtor 2.06GB, the second is a WD 81GB (yes, I'm using the whole thing as swap space). (better to give the whole sorry mess than miss something possibly significant) ->this problem report is the same as or similar to the following -> (Most have been closed without fixes. I gave up after these 12) kern/1293 kern/2877 kern/5709 kern/5897 kern/2901 kern/2877 kern/1609 kern/2513 kern/3072 kern/3150 kern/4273 kern/5994 >How-To-Repeat: I am including my kernel config file here, it occours any time a shutdown is attempted. Please note that this does NOT occour with kernels built from the GENERIC config file --BEGIN BEAST-- # # Beast -- Custom kernel configuration file. # WD/ATAPI Disks. 80486 CPU, NO FPU # # For more information read the handbook part System Administration -> # Configuring the FreeBSD Kernel -> The Configuration File. # The handbook is available in /usr/share/doc/handbook or online as # latest version from the FreeBSD World Wide Web server # <URL:http://www.FreeBSD.ORG/>; # # An exhaustive list of options and more detailed explanations of the # device lines is present in the ./LINT configuration file. If you are # in doubt as to the purpose or necessity of a line, check first in LINT. # machine "i386" cpu "I486_CPU" ident "BEAST-1.0.0" maxusers 10 #reduced (sig12) options GPL_MATH_EMULATE #GPL'd 387 EMU. options INET #InterNETworking options FFS #Berkeley Fast Filesystem options MSDOSFS #MSDOS Filesystem options PROCFS #Process filesystem options "COMPAT_43" #Compatible with BSD 4.3 [KEEP THIS!] options BOUNCE_BUFFERS #include support for DMA bounce buffers options UCONSOLE #Allow users to grab the console options USERCONFIG #boot -c editor config kernel root on wd0 controller isa0 controller eisa0 controller fdc0 at isa? port "IO_FD1" bio irq 6 drq 2 vector fdintr disk fd0 at fdc0 drive 0 disk fd1 at fdc0 drive 1 controller wdc0 at isa? port "IO_WD1" bio irq 14 vector wdintr disk wd0 at wdc0 drive 0 disk wd1 at wdc0 drive 1 # BEAST's 2nd HDD is ATAPI-series options ATAPI #Enable ATAPI support for IDE bus options ATAPI_STATIC #Don't do it as an LKM # syscons is the default console driver, resembling an SCO console device sc0 at isa? port "IO_KBD" tty irq 1 vector scintr # Mandatory, don't remove device npx0 at isa? port "IO_NPX" flags 0x1 irq 13 vector npxintr device sio0 at isa? port "IO_COM1" tty irq 4 vector siointr device sio1 at isa? port "IO_COM2" tty irq 3 vector siointr device sio2 at isa? port "IO_COM3" tty irq 5 vector siointr device lpt0 at isa? port? tty irq 7 vector lptintr device mse0 at isa? port 0x23c tty irq 5 vector mseintr device psm0 at isa? port "IO_KBD" conflicts tty irq 12 vector psmintr pseudo-device loop pseudo-device ether pseudo-device log pseudo-device sl 1 pseudo-device ppp 1 pseudo-device vn 1 pseudo-device tun 1 pseudo-device pty 16 pseudo-device gzip # Exec gzipped a.out's pseudo-device speaker # For Piano and Morse :) # KTRACE enables the system-call tracing facility ktrace(2). # This adds 4 KB bloat to your kernel, and slightly increases # the costs of each syscall. options KTRACE #kernel tracing # This provides support for System V shared memory. # options SYSVSHM options SYSVSEM options SYSVMSG --END BEAST-- >Fix: Hmmmm, I give you two alternatives. Both gory and unplesant, but workable as *temporary* fixes: 1) Disable all swap space, as in yank the swap devices from /etc/fstab This works, the problem is in the VM system, and turning off swap space gets rid of the problem. It has the unfortunate effect of making this particular box unusable since there isn't enough RAM to work in. 2) Boot and run from the GENERIC kernel. This seems to work- both kernels built from the GENERIC config file and the included kernel.GENERIC do not have this problem on my system. However the generic kernel is bloated beyond belief and sucks up quite a bit of RAM. >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199808140651.XAA04532>