FreeBSD 5.4-RELEASE-p5 panics

dpk dpk at
Mon Aug 1 17:18:08 GMT 2005

I'm getting some panics on a few FreeBSD 5.4 boxes, and I'm trying to
figure out a way to get them to drop to some sort of debugger, or to dump
core. It used to be that you'd just add:

options DDB

and build a kernel with -g, set 'dumpon', and then when it paniced it
would write it out to disk. For 5.4, I understand you also need "options
KDB", and you need to replace DDB_UNATTENDED with KDB_UNATTENDED.

I've done all of that, but the panic did not trigger a core dump, and did
not leave me at a prompt (the latter probably because of KDB_UNATTENDED?).

The panic message, in the present case, in case someone's seen this
particular problem before:

Fatal trap 12: page fault while in kernel mode.
cpuid = 01; apic id = 06
fault virtual address		= 0x24
fault code			= supervisor read, page not present
instruction pointer		= 0x8:0xc035c7cf
stack pointer			= 0x10:0xeb858c74
frame pointer			= 0x10:0xeb858c88
code segment			= base 0x0, limit 0xfffff, type 0x1b
				= DPL 0, pres 1, def32 1, gran 1
processor eflags		= resume, IOPL equal 0
current process			= 8 (pagedaemon)

Would this sort of panic prevent a dump from occuring? BTW: I have checked
the handbook and haven't found the answer (it doesn't seem to mention KDB
at all).

Unfortunately the kernel buffer appears insufficient to store all the
output from "boot -v", so I'm booting it with no flags. I've included the
output of dmesg. Following that is the kernel's config. sysctl -a output
is available at (35KB)

Copyright (c) 1992-2005 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.
FreeBSD 5.4-RELEASE-p5 #2: Sun Jul 31 20:58:46 PDT 2005
    root at server:/usr/src/sys/i386/compile/STD-PAE
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Xeon(TM) CPU 3.00GHz (3000.12-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf41  Stepping = 1
  Hyperthreading: 2 logical CPUs
real memory  = 4831838208 (4608 MB)
avail memory = 4194848768 (4000 MB)
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  6
ioapic0: Assuming intbase of 0
ioapic1: Assuming intbase of 24
ioapic2: Assuming intbase of 48
ioapic3: Assuming intbase of 72
ioapic0 <Version 2.0> irqs 0-23 on motherboard
ioapic1 <Version 2.0> irqs 24-47 on motherboard
ioapic2 <Version 2.0> irqs 48-71 on motherboard
ioapic3 <Version 2.0> irqs 72-95 on motherboard
npx0: <math processor> on motherboard
npx0: INT 16 interface
cpu0 on motherboard
cpu1 on motherboard
pcib0: <MPTable Host-PCI bridge> pcibus 0 on motherboard
pci0: <PCI bus> on pcib0
pcib1: <PCI-PCI bridge> irq 16 at device 2.0 on pci0
pci1: <PCI bus> on pcib1
pcib2: <PCI-PCI bridge> at device 0.0 on pci1
pci3: <PCI bus> on pcib2
pcib3: <MPTable PCI-PCI bridge> at device 0.2 on pci1
pci2: <PCI bus> on pcib3
3ware device driver for 9000 series storage controllers, version:
twa0: <3ware 9000 series Storage Controller> port 0xa800-0xa8ff mem 0xfb800000-0xfbffffff,0xfc8ffc00-0xfc8ffcff irq 72 at device 1.0 on pci2
twa0: 4 ports, Firmware FE9X, BIOS BE9X
pcib4: <PCI-PCI bridge> irq 16 at device 3.0 on pci0
pci4: <PCI bus> on pcib4
pcib5: <MPTable PCI-PCI bridge> at device 28.0 on pci0
pci5: <PCI bus> on pcib5
em0: <Intel(R) PRO/1000 Network Connection, Version - 1.7.35> port 0xbc00-0xbc3f mem 0xfc9e0000-0xfc9fffff irq 26 at device 1.0 on pci5
em0: Ethernet address: 00:30:48:83:0a:f8
em0:  Speed:N/A  Duplex:N/A
em1: <Intel(R) PRO/1000 Network Connection, Version - 1.7.35> port 0xb800-0xb83f mem 0xfc9a0000-0xfc9bffff irq 27 at device 2.0 on pci5
em1: Ethernet address: 00:30:48:83:0a:f9
em1:  Speed:N/A  Duplex:N/A
pci0: <serial bus, USB> at device 29.0 (no driver attached)
pci0: <serial bus, USB> at device 29.1 (no driver attached)
pci0: <base peripheral> at device 29.4 (no driver attached)
pci0: <base peripheral, interrupt controller> at device 29.5 (no driver attached)
pci0: <serial bus, USB> at device 29.7 (no driver attached)
pcib6: <MPTable PCI-PCI bridge> at device 30.0 on pci0
pci6: <PCI bus> on pcib6
pci6: <display, VGA> at device 2.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel 6300ESB UDMA100 controller> port 0xfc00-0xfc0f,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 31.1 on pci0
ata0: channel #0 on atapci0
ata1: channel #1 on atapci0
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
orm0: <ISA Option ROMs> at iomem 0xca800-0xcb7ff,0xc9800-0xca7ff,0xc8000-0xc97ff,0xc0000-0xc7fff on isa0
pmtimer0 on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x64,0x60 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
fdc0: <Enhanced floppy controller> at port 0x3f0-0x3f5 irq 6 drq 2 on isa0
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
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
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
unknown: <PNP0501> can't assign resources (port)
unknown: <PNP0501> can't assign resources (port)
unknown: <PNP0700> can't assign resources (port)
unknown: <PNP0c02> can't assign resources (port)
unknown: <PNP0303> can't assign resources (port)
Timecounters tick every 10.000 msec
IP Filter: v3.4.35 initialized.  Default = pass all, Logging = enabled
ipfw2 initialized, divert disabled, rule-based forwarding disabled, default to accept, logging disabled
acd0: DVDROM <MATSHITADVD-ROM SR-8178/PZ16> at ata1-slave PIO4
da0 at twa0 bus 0 target 0 lun 0
da0: <3ware Logical Disk 00 1.00> Fixed Direct Access SCSI-0 device
da0: 100.000MB/s transfers
da0: 762918MB (1562456064 512 byte sectors: 255H 63S/T 97258C)
SMP: AP CPU #1 Launched!
Mounting root from ufs:/dev/da0s1a
em0: Link is up 100 Mbps Full Duplex


ident    STD-PAE

options  PAE
options  SMP

makeoptions  "NO_MODULES=yes DEBUG=-g"

options	DDB
options	KDB

#The following four lines are not found in the GENERIC file.

options         IPFILTER                #ipfilter support
options         IPFILTER_LOG            #ipfilter logging
options         IPFIREWALL              #firewall
options         IPFIREWALL_DEFAULT_TO_ACCEPT    #allow everything by default

# The following lines, to the end of this file, were all taken verbatim
# from the GENERIC file (though many lines from that file were excluded).

machine		i386
cpu		I686_CPU

# To statically compile in device wiring instead of /boot/device.hints
#hints		"GENERIC.hints"		# Default places to look for devices.

options 	SCHED_4BSD		# 4BSD scheduler
options 	INET			# InterNETworking
options 	FFS			# Berkeley Fast Filesystem
options 	SOFTUPDATES		# Enable FFS soft updates support
options 	UFS_ACL			# Support for access control lists
options 	UFS_DIRHASH		# Improve performance on big directories
options 	MD_ROOT			# MD is a potential root device
options 	NFSCLIENT		# Network Filesystem Client
options 	NFSSERVER		# Network Filesystem Server
options 	NFS_ROOT		# NFS usable as /, requires NFSCLIENT
options 	CD9660			# ISO 9660 Filesystem
options 	PROCFS			# Process filesystem (requires PSEUDOFS)
options 	PSEUDOFS		# Pseudo-filesystem framework
options 	GEOM_GPT		# GUID Partition Tables.
options 	COMPAT_43		# Compatible with BSD 4.3 [KEEP THIS!]
options 	COMPAT_FREEBSD4		# Compatible with FreeBSD4
options 	SCSI_DELAY=15000	# Delay (in ms) before probing SCSI
options 	KTRACE			# ktrace(1) support
options 	SYSVSHM			# SYSV-style shared memory
options 	SYSVMSG			# SYSV-style message queues
options 	SYSVSEM			# SYSV-style semaphores
options 	_KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions
options 	KBD_INSTALL_CDEV	# install a CDEV entry in /dev
options 	ADAPTIVE_GIANT		# Giant mutex is adaptive.
options 	ASR_COMPAT		# asr old ioctls support, needed by raidutils

device		apic		# I/O APIC

device          carp

# Bus support.  Do not remove isa, even if you have no isa slots
device		isa
device		eisa
device		pci

# Floppy drives
device		fdc

# ATA and ATAPI devices
device		ata
device		atadisk		# ATA disk drives
device		atapicd		# ATAPI CDROM drives
device		atapifd		# ATAPI floppy drives
device		atapist		# ATAPI tape drives
options 	ATA_STATIC_ID	# Static device numbering

# SCSI Controllers
device		ahc		# AHA2940 and onboard AIC7xxx devices
device		ahd		# AHA39320/29320 and onboard AIC79xx devices
device		mpt		# LSI-Logic MPT-Fusion
nodevice	sym		# NCR/Symbios Logic (newer chipsets + those of `ncr')

# SCSI peripherals
device		scbus		# SCSI bus (required for SCSI)
device		da		# Direct Access (disks)
device		sa		# Sequential Access (tape etc)
device		cd		# CD
device		pass		# Passthrough device (direct SCSI access)
device		ses		# SCSI Environmental Services (and SAF-TE)

# RAID controllers interfaced to the SCSI subsystem
device		amr		# AMI MegaRAID
device          arcmsr          # Areca SATA II RAID
nodevice	asr		# DPT SmartRAID V, VI and Adaptec SCSI RAID
device		ciss		# Compaq Smart RAID 5*
nodevice	dpt		# DPT Smartcache III, IV - See NOTES for options
nodevice	iir		# Intel Integrated RAID
device		ips		# IBM (Adaptec) ServeRAID
device		twa		# 3ware 9000 series PATA/SATA RAID

# RAID controllers
device		aac		# Adaptec FSA RAID
device		aacp		# SCSI passthrough for aac (requires CAM)
nodevice	ida		# Compaq Smart RAID
device		twe		# 3ware ATA RAID

# atkbdc0 controls both the keyboard and the PS/2 mouse
device		atkbdc		# AT keyboard controller
device		atkbd		# AT keyboard
device		psm		# PS/2 mouse

device		vga		# VGA video card driver

# syscons is the default console driver, resembling an SCO console
device		sc

nodevice	agp		# support several AGP chipsets

# Floating point support - do not disable.
device		npx

# Add suspend/resume support for the i8254.
device		pmtimer

# Serial (COM) ports
device		sio		# 8250, 16[45]50 based serial ports

# If you've got a "dumb" serial or parallel PCI card that is
# supported by the puc(4) glue driver, uncomment the following
# line to enable it (connects to the sio and/or ppc drivers):
device          puc

# PCI Ethernet NICs.
device		em		# Intel PRO/1000 adapter Gigabit Ethernet Card
device		ixgb		# Intel PRO/10GbE Ethernet Card

# PCI Ethernet NICs that use the common MII bus controller code.
# NOTE: Be sure to keep the 'device miibus' line in order to use these NICs!
device		miibus		# MII bus support
device		bfe		# Broadcom BCM440x 10/100 Ethernet
device		bge		# Broadcom BCM570xx Gigabit Ethernet
device		fxp		# Intel EtherExpress PRO/100B (82557, 82558)
device		xl		# 3Com 3c90x (``Boomerang'', ``Cyclone'')

# Pseudo devices.
device		loop		# Network loopback
device		mem		# Memory and kernel memory devices
device		io		# I/O device
device		random		# Entropy device
device		ether		# Ethernet support
device		ppp		# Kernel PPP
device		pty		# Pseudo-ttys (telnet etc)
device		md		# Memory "disks"

# The `bpf' device enables the Berkeley Packet Filter.
# Be aware of the administrative consequences of enabling this!
device		bpf		# Berkeley packet filter

# USB support
nodevice	uhci		# UHCI PCI->USB interface
nodevice	ohci		# OHCI PCI->USB interface
nodevice	usb		# USB Bus (required)
nodevice	ugen		# Generic
nodevice	uhid		# "Human Interface Devices"
nodevice	ukbd		# Keyboard
nodevice	umass		# Disks/Mass storage - Requires scbus and da

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