-current deadlock w/debugging pics

Fri May 20 21:42:11 GMT 2005

Hi.

I've been experiencing a solid lockup on -current a couple times a day
to the point where I can't get a crash dump - even by triggering a panic
from the debugger.  I think processes are deadlocking and more and more
get into the deadlock until the machine is unusable.  A common situation
is that the screensaver is running but keyboard input is ignored.
Sometimes I can get to the debugger,  sometimes not.  In any case, I
really don't know what to look for there and the lockups aren't easily
triggered.  I've run with WITNESS and INVARIANTS on, but seen no panic
or output.  (The run below was with the debugger but w/o
WITNESS/INVARIANTS)

The last lockup I had, did a ps from the debugger and took pictures of
the screen.  Pics are avaliable from
http://www.isi.edu/~faber/tmp/deadlock/DSCN04{75,76,77,78,79,80,81,82}.JPG

They're legible, but not beautiful.

I've included a kernel config and I can give you a verbose boot on
request.

Does this help anyone find the problem?  What should I take pictures of
next time to help?

Thanks in advance.

-- 
Ted Faber
http://www.isi.edu/~faber           PGP: http://www.isi.edu/~faber/pubkeys.asc
Unexpected attachment on this mail? See http://www.isi.edu/~faber/FAQ.html#SIG 
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#
# GENERIC -- Generic kernel configuration file for FreeBSD/i386
#
# For more information on this file, please read the handbook section on
# Kernel Configuration Files:
#
#    http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html
#
# The handbook is also available locally in /usr/share/doc/handbook
# if you've installed the doc distribution, otherwise always see the
# FreeBSD World Wide Web server (http://www.FreeBSD.org/) for the
# latest information.
#
# An exhaustive list of options and more detailed explanations of the
# device lines is also present in the ../../conf/NOTES and NOTES files.
# If you are in doubt as to the purpose or necessity of a line, check first
# in NOTES.
#
# $FreeBSD: src/sys/i386/conf/GENERIC,v 1.420 2004/11/02 20:57:19 andre Exp $

machine		i386
cpu		I486_CPU
cpu		I586_CPU
cpu		I686_CPU
ident		PUN

options 	SCHED_4BSD		# 4BSD scheduler
options 	PREEMPTION		# Enable kernel thread preemption
options 	INET			# InterNETworking
options 	INET6			# IPv6 communications protocols
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 	GEOM_GPT		# GUID Partition Tables.
options 	COMPAT_43		# Compatible with BSD 4.3 [KEEP THIS!]
options 	COMPAT_FREEBSD4		# Compatible with FreeBSD4
options 	SCSI_DELAY=5000		# 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.

# Debugging for use in -current
options 	KDB			# Enable kernel debugger support.
options 	DDB			# Support DDB.
options 	GDB			# Support remote GDB.
#options 	INVARIANTS		# Enable calls of extra sanity checking
#options 	INVARIANT_SUPPORT	# Extra sanity checks of internal structures, required by INVARIANTS
#options 	WITNESS			# Enable checks to detect deadlocks and cycles
#options 	WITNESS_SKIPSPIN	# Don't run witness on spinlocks for speed

# 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
options 	ATA_STATIC_ID	# Static device numbering

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

device		vga		# VGA video card driver

device		splash		# Splash screen and screen saver support

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

device		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

# Parallel port
device		ppc
device		ppbus		# Parallel port bus (required)
device		lpt		# Printer
device		ppi		# Parallel port interface device

# 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		dc		# DEC/Intel 21143 and various workalikes

# 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		sl		# Kernel SLIP
device		ppp		# Kernel PPP
device		tun		# Packet tunnel.
device		pty		# Pseudo-ttys (telnet etc)
device		md		# Memory "disks"
device		gif		# IPv6 and IPv4 tunneling
device		faith		# IPv6-to-IPv4 relaying (translation)

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

# USB support
device		uhci		# UHCI PCI->USB interface
device		ohci		# OHCI PCI->USB interface
device		usb		# USB Bus (required)
device		ugen		# Generic
device		uhid		# "Human Interface Devices"
device		ukbd		# Keyboard
device		ulpt		# Printer
device		ums		# Mouse
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