Date: Mon, 17 May 1999 14:26:18 -0400 (EDT) From: "John W. DeBoskey" <jwd@unx.sas.com> To: freebsd-current@freebsd.org Subject: Fatal Trap 12 (-current kernel w/MFS) Message-ID: <199905171826.OAA76104@bb01f39.unx.sas.com>
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Hi,
For those of you who know more than I.... When a -current
kernel boots up, it dies when trying to mount /tmp as an mfs.
Fatal Trap 12: page fault while in kernel mode
fault virtual address = 0x9d2c0b38
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc0170b44
stack pointer = 0x10:0xc7bbbd84
frame pointer = 0x10:0xc7bbbdb0
code segment = base 0x0, limit 0xfff, type=0x1b
DPL 0, pres 1, def32 1, gran 1
processor eflags = interupt enabled, resume, IOPL=0
current process = 39 (mount_mfs)
interrupt mask =
trap number = 12
If I remove MFS & MFS_ROOT from the kernel and comment out
the /tmp mfs mount from /etc/fstab, the kernel boots correctly.
#------- Kernel config -----------
machine "i386"
cpu "I686_CPU"
ident FreeBSD
maxusers 128
options MATH_EMULATE #Support for x87 emulation
options INET #InterNETworking
options FFS #Berkeley Fast Filesystem
options FFS_ROOT #FFS usable as root device [keep this!]
options MFS #Memory Filesystem
options MFS_ROOT #MFS usable as root device, "MFS" req'ed
options NFS #Network Filesystem
options NFS_ROOT #NFS usable as root device, "NFS" req'ed
options MSDOSFS #MSDOS Filesystem
options "CD9660" #ISO 9660 Filesystem
options "CD9660_ROOT" #CD-ROM usable as root. "CD9660" req'ed
options PROCFS #Process filesystem
options "COMPAT_43" #Compatible with BSD 4.3 [KEEP THIS!]
options SCSI_DELAY=5000 #Be pessimistic about Joe SCSI device
options UCONSOLE #Allow users to grab the console
options FAILSAFE #Be conservative
options USERCONFIG #boot -c editor
options VISUAL_USERCONFIG #visual boot -c editor
#makeoptions DEBUG=-g #Build kernel with gdb(1) debug symbols
#
# Enable Posix priority scheduling
#
#options "P1003_1B"
options "_KPOSIX_PRIORITY_SCHEDULING"
#options "_KPOSIX_VERSION=199309L"
controller isa0
#controller eisa0
controller pci0
controller dpt0
controller fdc0 at isa? port IO_FD1 irq 6 drq 2
disk fd0 at fdc0 drive 0
disk fd1 at fdc0 drive 1
controller wdc0 at isa? port IO_WD1 irq 14 flags 0xa0ffa0ff
disk wd0 at wdc0 drive 0
disk wd1 at wdc0 drive 1
controller wdc1 at isa? port IO_WD2 irq 15
disk wd2 at wdc1 drive 0
disk wd3 at wdc1 drive 1
device acd0 #IDE CD-ROM
device wfd0 #IDE Floppy (e.g. LS-120)
# A single entry for any of these controllers (ncr, ahb, ahc) is
# sufficient for any number of installed devices.
controller ahc0
controller scbus0
device da0
device sa0
device pass0
device cd0 #Only need one of these, the code dynamically grows
# atkbdc0 controlls both the keyboard and the PS/2 mouse
controller atkbdc0 at isa? port IO_KBD
device atkbd0 at atkbdc? irq 1
device psm0 at atkbdc? irq 12
device vga0 at isa? port ? conflicts
# splash screen/screen saver
pseudo-device splash
# syscons is the default console driver, resembling an SCO console
device sc0 at isa?
device npx0 at nexus? port IO_NPX irq 13
#
# sio: serial ports (see sio(4))
#
device sio0 at isa? port IO_COM1 flags 0x10 irq 4
device sio1 at isa? port IO_COM2 irq 3
#
# Parallel-Port Bus
#
#controller ppbus0
#device lpt0 at ppbus? # Parallel Printer
# Order is important here due to intrusive probes, do *not* alphabetize
# this list of network interfaces until the probes have been fixed.
# Right now it appears that the ie0 must be probed before ep0. See
# revision 1.20 of this file.
device fxp0
device xl0
device ti0
pseudo-device loop
pseudo-device ether
pseudo-device sl 1
pseudo-device ppp 1
pseudo-device tun 1
pseudo-device pty 64
pseudo-device gzip # Exec gzipped a.out's
pseudo-device vn #Vnode driver (turns a file into a device)
pseudo-device ccd 4 #Concatenated disk driver
pseudo-device snp 3 #Snoop device - to look at pty/vty/etc..
# 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
options USER_LDT #allow user-level control of i386 ldt
# The `bpfilter' pseudo-device enables the Berkeley Packet Filter. Be
# aware of the legal and administrative consequences of enabling this
# option. The number of devices determines the maximum number of
# simultaneous BPF clients programs runnable.
#pseudo-device bpfilter 4 #Berkeley packet filter
# USB support
#controller uhci0
#controller ohci0
#controller usb0
#
# for the moment we have to specify the priorities of the device
# drivers explicitly by the ordering in the list below. This will
# be changed in the future.
#
#device ums0
#device ukbd0
#device ulpt0
#device uhub0
#device ucom0
#device umodem0
#device hid0
#device ugen0
#
#options USB_DEBUG
#options USBVERBOSE
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