Hi,

I just tried to upgrade my machine from 32 to 64 MB, but I always get
a kernel panic during boot. I tried without EXTMEM_SIZE (as far as I
can tell, the BIOS reports the memorysize correctly) and with a kernel
with EXTMEM_SIZE set to 64512 (63 MB) as well as a kernel with 
EXTMEM_SIZE=61440 (60 MB). All kernels panic during boot (at different
stages, though).

Hardware is a Gigabyte GA-586 HX board, 512 KB L2-cache, Pentium 133,
2x32MB PS/2 RAM (60 ns, EDO). Software is NetBSD 1.2 (config file is
appended at the end of this message). The machine works fine with
2x16MB PS/2 RAM (60 ns, FPM).


This trace is with EXTMEM_SIZE set to 61440 (handcopied to a piece of
paper and retyped later, so there may be typos):

---------------- trace -------------------
[other bootmessages]
starting rpc daemons: portmap mountd nfsdpanic: ptdi 20f063

stopped at _Debugger+0x4: leave
db> trace
_Debugger(f811fd00,f81af310,faff9e14,f82ee5d8,faff9e30) at _Debugger+0x4
_panic(f81af310,20f063,f82ee5d8,1000,f87b0f00) at _panic+0x3a
_pmap_enter(f81e63d4,fb000000,1a01000,7,1) at _pmap_enter+0x55
_vm_fault(f828b000,fb000000,7,1) at _vm_fault+0x8c2
_vm_fault_wire(f828b000,fafff000,fb001000,fafff000,f87e0200) at _vm_fault_wire+0x35
_vm_map_pageable(f828b000,fafff000,fb001000,0,f87e0900) at _vm_map_pageable+0x285
_vm_fork(f87e0200,f87e0900) at _vm_fork+0x89
_fork1(f87e0200,0,faff9f80,faff9fa8,f81b0fd4) at _fork1+0x37d
_sys_fork(f87e0200,faff9f88,faff9f80,0,1) at _sys_fork+0x10
_syscall() at _syscall+0x260
--- syscall (number 2) ---
0x257f:
db>
-------------- end of trace ----------------
This kernel always dies after the "nfsd" message.


With EXTMEM_SIZE=64512 the kernel dies earlier, it panics right after 
printing the copyright message (I did not write down all the hex-numbers,
if you need them, just tell me):

----------------- trace --------------------
_Debugger
_panic
_pmap_enter
_vm_fault
_vm_fault_wire
_vm_map_pageable
_kmem_alloc
_pmap_init
_vm_mem_init
_main
-------------- end of trace ---------------- 

Is it possible that this is a hardware problem, eg. may the RAM be faulty?
The BIOS tests the RAM ok, and DOS' highmem.sys also finds no errors.

If you need any more info to find out what's wrong, please tell me. I
would really like to be able to use my new memory. :-<

Thanks in advance,
	Klaus


--------------- config file ----------------
#	ZORK
#

machine		i386		# architecture, used by config; REQUIRED

#options		I386_CPU	# CPU classes; at least one is REQUIRED
#options		I486_CPU
options		I586_CPU
#options		MATH_EMULATE	# floating point emulation
options	VM86		# Virtual 8086 emulation

# Some BIOSes don't get the size of extended memory right.  If you
# have a broken BIOS, uncomment the following and set the value
# properly for your system.
options		EXTMEM_SIZE=61440	# size of extended memory (60*1024)
					# 640k + hole + 63M extended memory

options		DUMMY_NOPS	# speed hack; recommended
options		XSERVER,UCONSOLE
options		INSECURE	# insecure; allow /dev/mem writing for X
options		MACHINE_NONCONTIG

maxusers	32		# estimated number of users
options		TIMEZONE=0	# time zone to adjust RTC time by
options		DST=0		# daylight savings time used by RTC

options		SWAPPAGER	# paging; REQUIRED
options		VNODEPAGER	# mmap() of files
options		DEVPAGER	# mmap() of devices

options		DDB		# in-kernel debugger
#makeoptions	DEBUG="-g"	# compile full symbol table
options		DIAGNOSTIC	# internal consistency checks
options		KTRACE		# system call tracing, a la ktrace(1)

options		SYSVMSG		# System V-like message queues
options		SYSVSEM		# System V-like semaphores
options		SYSVSHM		# System V-like memory sharing
options		SHMMAXPGS=4096	# 1024 pages is the default

options		COMPAT_NOMID	# compatibility with 386BSD, BSDI, NetBSD 0.8,
options		COMPAT_09	# NetBSD 0.9,
options		COMPAT_10	# NetBSD 1.0,
options		COMPAT_11	# NetBSD 1.1,
options		COMPAT_43	# and 4.3BSD
options		TCP_COMPAT_42	# TCP bug compatibility with 4.2BSD

#options		COMPAT_SVR4	# binary compatibility with SVR4
options		COMPAT_IBCS2	# binary compatibility with SCO and ISC
options		COMPAT_LINUX	# binary compatibility with Linux
options		COMPAT_FREEBSD	# binary compatibility with FreeBSD

options		USER_LDT	# user-settable LDT; used by WINE
options		LKM		# loadable kernel modules

options		FFS		# UFS
options		QUOTA		# UFS quotas
#options		LFS		# log-structured file system
options		MFS		# memory file system

options		NFSCLIENT	# Network File System client
options		NFSSERVER	# Network File System server

options		CD9660		# ISO 9660 + Rock Ridge file system
options		MSDOSFS		# MS-DOS file system
options		FDESC		# /dev/fd
options		FIFO		# FIFOs; RECOMMENDED
options		KERNFS		# /kern
options		NULLFS		# loopback file system
#options		PORTAL		# portal filesystem (still experimental)
options		PROCFS		# /proc
options		UMAPFS		# NULLFS + uid and gid remapping
options		UNION		# union file system

#options	GATEWAY		# packet forwarding
options		INET		# IP + ICMP + TCP + UDP
#options		NS		# XNS
#options		ISO,TPIP	# OSI
#options		EON		# OSI tunneling over IP
#options		CCITT,LLC,HDLC	# X.25

config		netbsd root on sd0a swap on sd1b and sd2b and sd3b
#options		GENERIC

mainbus0 at root

isa0	at mainbus0
eisa0	at mainbus0
pci0	at mainbus0 bus ?

ppb*	at pci? dev ? function ?	# PCI-PCI bridges
pci*	at ppb? bus ?

npx0	at isa? port 0xf0 irq 13	# math coprocessor

pc0	at isa? port 0x60 irq 1		# generic PC console device
#vt0	at isa? port 0x60 irq 1

com0	at isa? port 0x3f8 irq 4	# standard PC serial ports
com1	at isa? port 0x2f8 irq 3
com2	at isa? port 0x3e8 irq 5
#com3	at isa? port 0x2e8 irq 9
#ast0	at isa? port 0x1a0 irq 5	# AST 4-port serial cards
#com*	at ast? slave ?
#boca0	at isa? port 0x100 irq 5	# BOCA 8-port serial cards
#com*	at boca? slave ?
#rtfps0	at isa? port 0x1230 irq 10	# RT 4-port serial cards
#com*	at rtfps? slave ?

#cy0	at isa? ...

lpt0	at isa? port 0x378 irq 7	# standard PC parallel ports
lpt1	at isa? port 0x278
lpt2	at isa? port 0x3bc

lms0	at isa? port 0x23c irq 5	# Logitech bus mouse
lms1	at isa? port 0x238 irq 5
mms0	at isa? port 0x23c irq 5	# Microsoft InPort mouse
mms1	at isa? port 0x238 irq 5
#pms0	at pckbd? irq 12		# PS/2 auxiliary port mouse

#aha0	at isa? port 0x330 irq ? drq ?	# Adaptec 154[02] SCSI controllers
#aha1	at isa? port 0x334 irq ? drq ?	# Adaptec 154[02] SCSI controllers
#scsibus* at aha?
#ahb*	at eisa? slot ?			# Adaptec 174[024] SCSI controllers
#scsibus* at ahb?
#ahc0	at isa? port ? irq ?		# Adaptec 284x SCSI controllers
#ahc*	at eisa? slot ?			# Adaptec 274x, aic7770 SCSI controllers
ahc*	at pci? dev ? function ?	# Adaptec [23]94x, aic78x0 SCSI controllers
scsibus* at ahc?
#aic0	at isa? port 0x340 irq 11	# Adaptec 152[02] SCSI controllers
#scsibus* at aic?
#bt0	at isa? port 0x330 irq ? drq ?	# BusLogic [57]4X SCSI controllers
#bt1	at isa? port 0x334 irq ? drq ?	# BusLogic [57]4X SCSI controllers
#bt2	at isa? port ? irq ?
#scsibus* at bt?
#ncr*	at pci? dev ? function ?	# NCR 538XX SCSI controllers
#scsibus* at ncr?
#sea0	at isa? iomem 0xc8000 irq 5
#scsibus* at sea?
#uha0	at isa? port 0x330 irq ? drq ?	# UltraStor [13]4f SCSI controllers
#uha1	at isa? port 0x334 irq ? drq ?	# UltraStor [13]4f SCSI controllers
#uha2	at isa? port ? irq ?		# UltraStor 24f SCSI controllers
#scsibus* at uha?
#wds0	at isa? port 0x350 irq 15 drq 6	# WD7000 and TMC-7000 controllers
#wds1	at isa? port 0x358 irq 11 drq 5
#scsibus* at wds?

sd0	at scsibus? target 0 lun ?	# SCSI disk drives, unit 0
sd1	at scsibus? target 1 lun ?	# SCSI disk, unit 1
sd2	at scsibus? target 2 lun ?	# SCSI disk, unit 2
sd3	at scsibus? target 3 lun ?	# SCSI disk, unit 3
sd*	at scsibus? target ? lun ?	# SCSI disk, other units
st*	at scsibus? target ? lun ?	# SCSI tape drives
cd*	at scsibus? target ? lun ?	# SCSI CD-ROM drives
ch*	at scsibus? target ? lun ?	# SCSI autochangers

fdc0	at isa? port 0x3f0 irq 6 drq 2	# standard PC floppy controllers
#fdc1	at isa? port 0x370 irq ? drq ?
fd*	at fdc? drive ?

#mcd0	at isa? port 0x300 irq 10	# Mitsumi CD-ROM drives

#wdc0	at isa? port 0x1f0 irq 14	# ST506, ESDI, and IDE controllers
#wdc1	at isa? port 0x170 irq ?
#wd*	at wdc? drive ?

#wt0	at isa? port 0x300 irq 5 drq 1	# Archive and Wangtek QIC tape drives

ed0	at isa? port 0x280 iomem 0xd0000 irq 15	# WD/SMC, 3C503, and NE[12]000
#ed1	at isa? port 0x250 iomem 0xd8000 irq 9	#   ethernet cards
#ed2	at isa? port 0x300 iomem 0xcc000 irq 10
#eg0	at isa? ...				# 3C505 ethernet cards
#el0	at isa? port 0x300 irq 9		# 3C501 ethernet cards
#ep0	at isa? port ? irq ?			# 3C509 ethernet cards
#ie0	at isa? port 0x360 iomem 0xd0000 irq 7	# StarLAN and 3C507
#ie1	at isa? port 0x300 irq 10		# EtherExpress
#le0	at isa? port 0x320 irq 10 drq 7		# IsoLan, NE2100, and DEPCA
#ep*	at eisa? slot ?				# 3C579 ethernet cards
#fea*	at eisa? slot ?				# DEC DEFEA FDDI cards
#le*	at pci? dev ? function ?		# PCnet-PCI based ethernet cards
#de*	at pci? dev ? function ?		# DC21X4X-based ethernet cards
#ep*	at pci? dev ? function ?		# 3C590 ethernet cards
#fpa*	at pci? dev ? function ?		# DEC DEFPA FDDI cards

#pss0	at isa? port 0x220 irq 7 drq 6  # Personal Sound System
#sp0	at pss0 port 0x530 irq 10 drq 0	# 	sound port driver

sb0	at isa? port 0x220 irq 5 drq 1	# SoundBlaster
#wss0	at isa? port 0x530 irq 10 drq 0	# Windows Sound System
#pas0	at isa? port 0x220 irq 7 drq 1	# ProAudio Spectrum
#gus0	at isa? port 0x220 irq 7 drq 1 flags 6 # Gravis Ultra Sound (flags is record drq for full-duplex)
spkr0	at pckbd? port 0x61

# Joystick driver. Probe is a little strange; add only if you have one.
#joy0	at isa? port 0x201

pseudo-device	loop	1		# network loopback
pseudo-device	bpfilter 8		# packet filter
pseudo-device	sl	2		# CSLIP
pseudo-device	ppp	2		# PPP
pseudo-device	tun	2		# network tunneling over tty

pseudo-device	pty	64		# pseudo-terminals
pseudo-device	tb	1		# tablet line discipline
pseudo-device	vnd	4		# paging to files
pseudo-device	ccd	4		# concatenated disk devices
-------------- end of config file ---------------