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Date:      Mon, 11 Jun 2001 19:17:46 +0200
From:      Arne Lundberg <arlu@telia.com>
To:        freebsd-questions@FreeBSD.ORG
Subject:   microuptime() went backwards
Message-ID:  <01061119251901.00680@vera>

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I have installed 4.3-RELEASE onto my old 486DX2 and are using it
as a firewall/router towards my DSL modem. Several times it has gotten into a 
state with this "microuptime went backwards" message all over the console
and only a reboot could stop it.

I have tried to search the archives but found nothing that could explain/solve
this problem 

Ideas anyone? I include the dmesg and kernel config below.

Thanks for any help.

-- Arne

----------------- dmesg --------------------
Copyright (c) 1992-2001 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 4.3-RELEASE #4: Sun Jun 10 13:49:58 CEST 2001
    root@fw.telia.com:/usr/src/sys/compile/FIREWALL
Timecounter "i8254"  frequency 1193182 Hz
CPU: i486 DX2 (486-class CPU)
  Origin = "GenuineIntel"  Id = 0x435  Stepping = 5
  Features=0x3<FPU,VME>
real memory  = 16777216 (16384K bytes)
config> di pcic0
No such device: pcic0
Invalid command or syntax.  Type `?' for help.
config> di psm0
config> di bt0
No such device: bt0
Invalid command or syntax.  Type `?' for help.
config> di aic0
No such device: aic0
Invalid command or syntax.  Type `?' for help.
config> di aha0
No such device: aha0
Invalid command or syntax.  Type `?' for help.
config> di adv0
No such device: adv0
Invalid command or syntax.  Type `?' for help.
config> q
avail memory = 13987840 (13660K bytes)
Preloaded elf kernel "kernel" at 0xc0291000.
Preloaded userconfig_script "/boot/kernel.conf" at 0xc029109c.
md0: Malloc disk
npx0: <math processor> on motherboard
npx0: INT 16 interface
isa0: <ISA bus> on motherboard
fdc0: <NEC 765 or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
ata0 at port 0x1f0-0x1f7,0x3f6 irq 14 on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
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 16450
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16450
ed0 at port 0x300-0x31f iomem 0xcc000-0xcffff irq 10 on isa0
ed0: address 00:00:c0:28:56:67, type WD8013EPC (16 bit) 
ep0: <3Com 3C509-Combo EtherLink III> at port 0x280-0x28f irq 5 on isa0
ep0: Ethernet address 00:20:af:87:16:a0
IP Filter: v3.4.16 initialized.  Default = block all, Logging = enabled
ad0: 1039MB <QUANTUM FIREBALL1080A> [2112/16/63] at ata0-master BIOSPIO
ad1: 405MB <WDC AC2420F> [989/15/56] at ata0-slave BIOSPIO
Mounting root from ufs:/dev/ad0s1a
IP Filter: already initialized
------------- Kernel config ----------------
#
# For more information on this file, please read the handbook section on
# Kernel Configuration Files:
#
#    http://www.FreeBSD.org/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 ./LINT configuration file. If you are
# in doubt as to the purpose or necessity of a line, check first in LINT.
#
# $FreeBSD: src/sys/i386/conf/GENERIC,v 1.246.2.24 2001/04/05 17:23:10 sos Exp $

machine		i386
cpu		I486_CPU
ident		FIREWALL
maxusers	8

#makeoptions	DEBUG=-g		#Build kernel with gdb(1) debug symbols

options 	MATH_EMULATE		#Support for x87 emulation
options 	INET			#InterNETworking
options 	IPFILTER
options 	IPFILTER_LOG
options 	IPFILTER_DEFAULT_BLOCK
options 	FFS			#Berkeley Fast Filesystem
options 	FFS_ROOT		#FFS usable as root device [keep this!]
options 	SOFTUPDATES		#Enable FFS soft updates support
options 	MFS			#Memory Filesystem
options 	MD_ROOT			#MD is a potential root device
options 	MSDOSFS			#MSDOS Filesystem
options 	CD9660			#ISO 9660 Filesystem
options 	CD9660_ROOT		#CD-ROM usable as root, CD9660 required
options 	PROCFS			#Process filesystem
options 	COMPAT_43		#Compatible with BSD 4.3 [KEEP THIS!]
options 	UCONSOLE		#Allow users to grab the console
options 	USERCONFIG		#boot -c editor
options 	VISUAL_USERCONFIG	#visual boot -c editor
options 	KTRACE			#ktrace(1) support
options 	SYSVSHM			#SYSV-style shared memory
options 	SYSVMSG			#SYSV-style message queues
options 	SYSVSEM			#SYSV-style semaphores
options 	P1003_1B		#Posix P1003_1B real-time extensions
options 	_KPOSIX_PRIORITY_SCHEDULING
options		ICMP_BANDLIM		#Rate limit bad replies
options 	KBD_INSTALL_CDEV	# install a CDEV entry in /dev

# To make an SMP kernel, the next two are needed
#options 	SMP			# Symmetric MultiProcessor Kernel
#options 	APIC_IO			# Symmetric (APIC) I/O

device		isa
device		eisa
#device		pci

# Floppy drives
device		fdc0	at isa? port IO_FD1 irq 6 drq 2
device		fd0	at fdc0 drive 0

# ATA and ATAPI devices
device		ata0	at isa? port IO_WD1 irq 14
device		ata1	at isa? port IO_WD2 irq 15
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


# atkbdc0 controls both the keyboard and the PS/2 mouse
device		atkbdc0	at isa? port IO_KBD
device		atkbd0	at atkbdc? irq 1 flags 0x1
device		psm0	at atkbdc? irq 12

device		vga0	at isa?

# splash screen/screen saver
pseudo-device	splash

# syscons is the default console driver, resembling an SCO console
device		sc0	at isa? flags 0x100

# Enable this and PCVT_FREEBSD for pcvt vt220 compatible console driver
#device		vt0	at isa?
#options 	XSERVER			# support for X server on a vt console
#options 	FAT_CURSOR		# start with block cursor
# If you have a ThinkPAD, uncomment this along with the rest of the PCVT lines
#options 	PCVT_SCANSET=2		# IBM keyboards are non-std

# Floating point support - do not disable.
device		npx0	at nexus? port IO_NPX irq 13

# Power management support (see LINT for more options)
#device		apm0    at nexus? disable flags 0x20 # Advanced Power Management


# Serial (COM) ports
device		sio0	at isa? port IO_COM1 flags 0x10 irq 4
device		sio1	at isa? port IO_COM2 irq 3
device		sio2	at isa? disable port IO_COM3 irq 5
device		sio3	at isa? disable port IO_COM4 irq 9

# ISA Ethernet NICs.
device		ed0	at isa? port 0x300 irq 10 iomem 0xcc000
device 		ep

# Pseudo devices - the number indicates how many units to allocate.
pseudo-device	loop		# Network loopback
pseudo-device	ether		# Ethernet support
#pseudo-device	sl	1	# Kernel SLIP
pseudo-device	ppp	1	# Kernel PPP
pseudo-device	tun		# Packet tunnel.
pseudo-device	pty		# Pseudo-ttys (telnet etc)
pseudo-device	md		# Memory "disks"
#pseudo-device	gif	4	# IPv6 and IPv4 tunneling
#pseudo-device	faith	1	# IPv6-to-IPv4 relaying (translation)

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


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