ACPI related Fatal trap 12 with RC1

[Steve Mynott <steve.mynott@xxxxxxxxx>]

Booting with ACPI enabled leads to a "Fatal trap 12: page fault while
in kernel mode" with RC-1

[...snip...]
acpi_cpu throttling enabled, 8 steps (100% to 12.5%), currently 100.0%

Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x0
fault code               = supervisor read, page not present
instruction pointer   =  0x8:0xc03ae59f
stack pointer          =  0x10:0xc9386bc4
frame pointer          =  0x10:0xc9386bc4
code segment        =   base 0x0, limit 0xfffff, type 0x1b
                             =  DPL 0, pres 1, def32 1, gran 1
processor eflags     =  interrupt enabled, resume, IOPL = 0
current process      =  Idle
current thread         = pri 12  
interrupt mask        =  none
kernel type 12 trap, code=0
Stopped at     strcmp+0x1b: cmpb    %al,0(%edx)
db> trace
strcmp(0,c043c2bd) at strcmp+0x1b
xe_probe(c5f4de10,c5f4d4c8,c5f4de10,0) at xe_probe+0x504
device_probe_child(c5f4d4c8,c5f4de10,c0fa9e80,c5f4d2d0,c5f4de10) at
device_probe_child+0xc6
device_probe_and_attach(c5f4de10) at device_probe_and_attach+0x57
pccard_attach_card(c5f4d4c8) at pccard_attach_card+0x2a8
cbb_insert(c1109698,c0dffd00,0,c0260b14,c1109698) at cbb_insert+0xae
cbb_event_thread(c1109698,0,0,0,0) at cbb_event_thread+0x61
kthread_exit() at kthread_exit
db>

dmesg:

Copyright (c) 2003, 2004 The DragonFly Project.
Copyright (c) 1992-2003 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
DragonFly 1.0-RC1 #3: Mon Jun 28 16:50:21 BST 2004
    root@xxxxxxxxxxxxxxx:/usr/obj/usr/src/sys/GENERIC
CPU: Pentium II/Pentium II Xeon/Celeron (365.01-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x66a  Stepping = 10
  Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,P
T,PSE36,MMX,FXSR>
real memory  = 201236480 (196520K bytes)
avail memory = 184684544 (180356K bytes)
Preloaded elf kernel "/kernel" at 0xc05cc000.
Preloaded elf module "/modules/splash_bmp.ko" at 0xc05cc1e8.
Preloaded elf module "/modules/vesa.ko" at 0xc05cc294.
VESA: v2.0, 2048k memory, flags:0x0, mode table:0xc00c8c3e (c0008c3e)
VESA: Copyright 1994 TRIDENT MICROSYSTEMS INC.

Pentium Pro MTRR support enabled
md0: Malloc disk
pcibios: BIOS version 2.10
Using $PIR table, 6 entries at 0xc00fdf60
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Intel 82443BX host to PCI bridge (AGP disabled)> at pcibus 0 on motherb
ard
pci0: <PCI bus> on pcib0
isab0: <Intel 82371AB PCI to ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 ATA33 controller> port 0xf4f0-0xf4ff at device 7.1 on pci
ata0: at 0x1f0 irq 14 on atapci0
installed MI handler for int 14
ata1: at 0x170 irq 15 on atapci0
installed MI handler for int 15
uhci0: <Intel 82371AB/EB (PIIX4) USB controller> irq 9 at device 7.2 on pci0
uhci0: Could not map ports
device_probe_and_attach: uhci0 attach returned 6
pci0: <Intel 82371AB Power management controller> at 7.3
pci0: <unknown card> (vendor=0x11c1, dev=0x0440) at 16.0 irq 9
cbb0: <TI1221 PCI-CardBus Bridge> irq 9 at device 19.0 on pci0
cardbus0: <CardBus bus> on cbb0
pccard0: <16-bit PCCard bus> on cbb0
installed MI handler for int 9
cbb1: <TI1221 PCI-CardBus Bridge> irq 9 at device 19.1 on pci0
cardbus1: <CardBus bus> on cbb1
pccard1: <16-bit PCCard bus> on cbb1
pci0: <Trident model 9388 VGA-compatible display device> at 20.0
orm0: <Option ROM> at iomem 0xc0000-0xcbfff on isa0
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
installed MI handler for int 6
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
installed MI handler for int 1
psm0: <PS/2 Mouse> irq 12 on atkbdc0
installed MI handler for int 12
psm0: model Generic PS/2 mouse, device ID 0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
installed MI handler for int 4
sio1: configured irq 3 not in bitmap of probed irqs 0
ppc0: parallel port not found.
installed MI handler for int 0
ata1-slave: ATAPI identify retries exceeded
wi0: <WaveLAN/IEEE> at port 0x100-0x13f irq 9 function 0 config 1 on pccard0
wi0: 802.11 address: 00:02:2d:09:66:8d
wi0: using Lucent Technologies, WaveLAN/IEEE
wi0: Lucent Firmware: Station 6.06.01
ad0: 9590MB <FUJITSU MHG2102AT> [19485/16/63] at ata0-master UDMA33
acd0: CDROM <UJDA170> at ata1-master PIO4
Mounting root from ufs:/dev/ad0s1a
cd0 at ata1 bus 0 target 0 lun 0
cd0: <MATSHITA UJDA170 1.05> Removable CD-ROM SCSI-0 device
cd0: 16.000MB/s transfers
cd0: Attempt to query device size failed: NOT READY, Medium not present
WARNING: / was not properly dismounted

-- Steve