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Date:      Fri, 10 Jan 1997 16:53:11 +0000
From:      "Richard Gresek" <rg@gds.de>
To:        freebsd-smp@freebsd.org
Subject:   kvm_read: bad address
Message-ID:  <199702101555.QAA05759@gds.de>

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Hallo,

I am running the SMP kernel on a 3.0-970124-SNAP system and a 
Gigabyte GA586DX Dual motherboard with 2 x P5 / 200 MHz and 96 MB 
RAM. The machine runs mostly OK for several days. Only under heavy 
load it breaks down quite immadiatelly. It seems that there is a 
problem with swap. Some apps cannot be started and show the message 
"kvm_read kvm_read: bad address". One of these apps is "dmesg".

This occures very irregularly, mostly quite after booting. Some 
minutes later (in case the machine is still running ;-)) also dmesg 
works fine again.

The same environment works very steadily with the GENERIC 970124-SNAP 
kernel.

Can it be a bug in the SMP kernel or is it because of the differences 
between the SNAP and the kernel version? Or do I have some 
misconfiguration in my kernel?

The kernel config file is included at the end of this mail.

Richard

#
# GENERIC -- Generic machine with WD/AHx/NCR/BTx family disks
#
# For more information read the handbook part System Administration 
-> 
# Configuring the FreeBSD Kernel -> The Configuration File. 
# The handbook is available in /usr/share/doc/handbook or online as
# latest version from the FreeBSD World Wide Web server 
# <URL:http://www.FreeBSD.ORG/>;
#
# An exhaustive list of options and more detailed explanations of the 

# device lines is present in the ./LINT configuration file. If you 
are 
# in doubt as to the purpose or necessity of a line, check first in 
LINT.
#
#	$Id: GENERIC,v 1.82 1996/12/21 02:09:04 se Exp $

machine		"i386"
#cpu		"I386_CPU"
#cpu		"I486_CPU"
cpu		"I586_CPU"
#cpu		"I686_CPU"
ident		GENERIC
maxusers	30
options         CHILD_MAX=512
options         OPEN_MAX=256

options		MATH_EMULATE		#Support for x87 emulation
options		INET			#InterNETworking
options		FFS			#Berkeley Fast Filesystem
options		NFS			#Network Filesystem
options		MSDOSFS			#MSDOS Filesystem
options		"CD9660"		#ISO 9660 Filesystem
options		PROCFS			#Process filesystem
options		"COMPAT_43"		#Compatible with BSD 4.3 [KEEP THIS!]
options		SCSI_DELAY=15		#Be pessimistic about Joe SCSI device
options		BOUNCE_BUFFERS		#include support for DMA bounce buffers
options		UCONSOLE		#Allow users to grab the console
options		FAILSAFE		#Be conservative
options		USERCONFIG		#boot -c editor
options		VISUAL_USERCONFIG	#visual boot -c editor

options		SMP
options		NCPU=2
options		NBUS=2
options		NAPIC=1
options		NINTR=24

options		APIC_IO
options		SMP_INVLTLB

options         SYSVSHM
options         SYSVSEM
options         SYSVMSG


config		kernel	root on wd0

controller	isa0
controller	eisa0
controller	pci0

controller	fdc0	at isa? port "IO_FD1" bio irq 6 drq 2 vector fdintr
disk		fd0	at fdc0 drive 0
disk		fd1	at fdc0 drive 1
tape		ft0	at fdc0 drive 2

controller	wdc0	at isa? port "IO_WD1" bio irq 14 vector wdintr
disk		wd0	at wdc0 drive 0
disk		wd1	at wdc0 drive 1

controller	wdc1	at isa? port "IO_WD2" bio irq 15 vector wdintr
disk		wd2	at wdc1 drive 0
disk		wd3	at wdc1 drive 1

options		ATAPI		#Enable ATAPI support for IDE bus
options		ATAPI_STATIC	#Don't do it as an LKM
device		wcd0	#IDE CD-ROM

# A single entry for any of these controllers (ncr, ahb, ahc, amd) is
# sufficient for any number of installed devices.
controller	ncr0
controller	amd0
controller	ahb0
controller	ahc0

controller	bt0	at isa? port "IO_BT0" bio irq ? vector bt_isa_intr
controller	uha0	at isa? port "IO_UHA0" bio irq ? drq 5 vector uhaintr
controller	aha0	at isa? port "IO_AHA0" bio irq ? drq 5 vector ahaintr
controller	aic0	at isa? port 0x340 bio irq 11 vector aicintr
controller	nca0	at isa? port 0x1f88 bio irq 10 vector ncaintr
controller	nca1	at isa? port 0x350 bio irq 5 vector ncaintr
controller	sea0	at isa? bio irq 5 iomem 0xc8000 iosiz 0x2000 vector 
seaintr

controller	scbus0

device		sd0

device		od0	#See LINT for possible `od' options.

device		st0

device		cd0	#Only need one of these, the code dynamically grows

device		wt0	at isa? port 0x300 bio irq 5 drq 1 vector wtintr
device		mcd0	at isa? port 0x300 bio irq 10 vector mcdintr

controller	matcd0	at isa? port 0x230 bio

device		scd0	at isa? port 0x230 bio

# syscons is the default console driver, resembling an SCO console
device		sc0	at isa? port "IO_KBD" tty irq 1 vector scintr
# Enable this and PCVT_FREEBSD for pcvt vt220 compatible console 
driver
#device		vt0	at isa? port "IO_KBD" tty irq 1 vector pcrint
#options		PCVT_FREEBSD=210	# pcvt running on FreeBSD >= 2.0.5
#options		XSERVER			# include code for XFree86
#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

# Mandatory, don't remove
device		npx0	at isa? port "IO_NPX" irq 13 vector npxintr

#
# Laptop support (see LINT for more options)
#
device		apm0    at isa?	disable	# Advanced Power Management
options		APM_BROKEN_STATCLOCK	# Workaround some buggy APM BIOS
# PCCARD (PCMCIA) support
#controller	crd0
#device		pcic0	at crd?
#device		pcic1	at crd?

device		sio0	at isa? port "IO_COM1" tty irq 4 vector siointr
device		sio1	at isa? port "IO_COM2" tty irq 3 vector siointr
#device		sio2	at isa? disable port "IO_COM3" tty irq 5 vector siointr
#device		sio3	at isa? disable port "IO_COM4" tty irq 9 vector siointr

device		lpt0	at isa? port? tty irq 7 vector lptintr
device		lpt1	at isa? port? tty
device		mse0	at isa? port 0x23c tty irq 5 vector mseintr

device		psm0	at isa? disable port "IO_KBD" conflicts tty irq 12 
vector psmintr

# Order is important here due to intrusive probes, do *not* 
alphabetize
# this list of network interfaces until the probes have been fixed.
# Right now it appears that the ie0 must be probed before ep0. See
# revision 1.20 of this file.
device de0
device fxp0
device vx0

#device ed0 at isa? port 0x280 net irq  5 iomem 0xd8000 vector edintr
#device ed1 at isa? port 0x300 net irq  5 iomem 0xd8000 vector edintr
#device ie0 at isa? port 0x360 net irq  7 iomem 0xd0000 vector ieintr
#device ep0 at isa? port 0x320 net irq 5 vector epintr
#device fe0 at isa? port 0x300 net irq ? vector feintr
#device ix0 at isa? port 0x300 net irq 10 iomem 0xd0000 iosiz 32768 
vector ixintr
#device le0 at isa? port 0x300 net irq 5 iomem 0xd0000 vector le_intr
#device lnc0 at isa? port 0x280 net irq 10 drq 0 vector lncintr
#device ze0 at isa? port 0x300 net irq 5 iomem 0xd8000 vector zeintr
#device zp0 at isa? port 0x300 net irq 10 iomem 0xd8000 vector zpintr

pseudo-device	loop
pseudo-device	ether
pseudo-device	log
pseudo-device	sl	1
# ijppp uses tun instead of ppp device
#pseudo-device	ppp	1
pseudo-device	tun	1
pseudo-device	pty	16
pseudo-device	gzip		# Exec gzipped a.out's

# KTRACE enables the system-call tracing facility ktrace(2).
# This adds 4 KB bloat to your kernel, and slightly increases
# the costs of each syscall.
#options		KTRACE		#kernel tracing

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