From owner-freebsd-stable  Tue Jan  8 13:11:17 2002
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From: steve@Watt.COM (Steve Watt)
Date: Tue, 8 Jan 2002 13:10:52 -0800
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To: stable@freebsd.org
Subject: VXLOCK interlock avoided messages
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Greetings!

I recently upgraded to a fresher stable (4.5-PRE, 2002-Jan-3 20:43PST),
and just saw (in my security report) the following very interesting
looking errors:
Jan  8 03:36:10 wattres /kernel: VXLOCK interlock avoided
Jan  8 03:36:10 wattres /kernel: VXLOCK interlock avoided in vn_lock

The box is usually pretty busy at that time of day running news expiry
and the various odd cron jobs (daily, etc.).  My news spool and libraries
reside on different spindles, news articles on /news, news libraries
on /old/local (filesystem list below).

The previous update was 27 Oct in the evening PST, and I've never seen
this message before.

I see that it's a self-deadlock avoider in the code, but I don't
know how to reproduce it (yet).  I'll keep an eye on it and see if
it occurs again.

Mostly, this is a heads-up, and I'm wondering if anyone has seen this
before and/or wants to gather more information.

Yes, I'm aware of the illegal cable configuration on my Adaptec, but
it's worked for two years now, and the only thing on the illegal stub
is the tape drive, which wasn't active at the time.

System information follows; PR kern/33709 has been filed with the same
info.


uname -a gives:

FreeBSD wattres.Watt.COM 4.5-PRERELEASE FreeBSD 4.5-PRERELEASE #0: Thu Jan  3 22:44:39 PST 2002     root@wattres.Watt.COM:/old/usr/obj/usr/src/sys/WATTRES  i386

The mounted filesystems are an unholy mix of SCSI and ATAPI:

Filesystem  1024-blocks     Used    Avail Capacity  Mounted on
/dev/ad0s1a      248047    54457   173747    24%    /
/dev/ad0s1h    47356048 19449770 24117795    45%    /home
/dev/ad0s1g    20326374   912648 17787617     5%    /local
/dev/ad0s1f     2032623   672206  1197808    36%    /usr
/dev/ad0s1e     2032623   297838  1572176    16%    /var
procfs                4        4        0   100%    /proc
/dev/da0a         31775    17929    11304    61%    /old
/dev/da0g       2393778  1497898   704378    68%    /old/local
/dev/da0f       1490111  1097335   273568    80%    /old/usr
/dev/da0e        148703    69190    67617    51%    /old/var
/dev/da1e       2384382  1510222   683410    69%    /old/home
/dev/da1f       6274132  1616773  4155429    28%    /news
/dev/da2c       1010689   591261   318360    65%    /backup

dmesg.boot has:

Copyright (c) 1992-2002 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 4.5-PRERELEASE #0: Thu Jan  3 22:44:39 PST 2002
    root@wattres.Watt.COM:/old/usr/obj/usr/src/sys/WATTRES
Timecounter "i8254"  frequency 1193182 Hz
Timecounter "TSC"  frequency 350797750 Hz
CPU: Pentium II/Pentium II Xeon/Celeron (350.80-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x652  Stepping = 2
  Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR>
real memory  = 134205440 (131060K bytes)
avail memory = 126590976 (123624K bytes)
Preloaded elf kernel "kernel" at 0xc03d5000.
Pentium Pro MTRR support enabled
md0: Malloc disk
Using $PIR table, 6 entries at 0xc00f0d10
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Intel 82443BX (440 BX) host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
pcib1: <Intel 82443BX (440 BX) PCI-PCI (AGP) bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <Matrox MGA G200 AGP graphics accelerator> at 0.0 irq 10
isab0: <Intel 82371AB PCI to ISA bridge> at device 4.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 ATA33 controller> port 0xd800-0xd80f at device 4.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
pci0: <Intel 82371AB/EB (PIIX4) USB controller> at 4.2 irq 10
chip1: <Intel 82371AB Power management controller> port 0xe800-0xe80f at device 4.3 on pci0
ed0: <NE2000 PCI Ethernet (ProLAN)> port 0xd000-0xd01f irq 10 at device 9.0 on pci0
ed0: address 00:20:78:12:71:34, type NE2000 (16 bit) 
xl0: <3Com 3c905B-TX Fast Etherlink XL> port 0xb800-0xb87f mem 0xe1000000-0xe100007f irq 10 at device 10.0 on pci0
xl0: Ethernet address: 00:50:04:73:f9:3a
miibus0: <MII bus> on xl0
xlphy0: <3Com internal media interface> on miibus0
xlphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
ahc0: <Adaptec 2940 Ultra SCSI adapter> port 0xb400-0xb4ff mem 0xe0800000-0xe0800fff irq 10 at device 11.0 on pci0
ahc0: Illegal cable configuration!!. Only two connectors on the adapter may be used at a time!
aic7880: Ultra Wide Channel A, SCSI Id=7, 16/255 SCBs
orm0: <Option ROMs> at iomem 0xc0000-0xc7fff,0xc8000-0xcc7ff on isa0
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
psm0: failed to get data.
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model Generic PS/2 mouse, device ID 255
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 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
sio2 at port 0x3e8-0x3ef irq 5 on isa0
sio2: type 16550A
sio3 at port 0x2e8-0x2ef irq 9 on isa0
sio3: type 16550A
sio4 at port 0x2f0-0x2f7 irq 11 on isa0
sio4: type 16550A
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/9 bytes threshold
ppbus0: IEEE1284 device found /NIBBLE
Probing for PnP devices on ppbus0:
ppbus0: <Hewlett-Packard HP LaserJet 5L/0101.03> HP ENHANCED PCL5,PJL
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
IP packet filtering initialized, divert enabled, rule-based forwarding disabled, default to deny, logging limited to 50 packets/entry by default
IPsec: Initialized Security Association Processing.
ata1-slave: identify retries exceeded
ad0: 73308MB <IBM-DTLA-307075> [148945/16/63] at ata0-master tagged UDMA33
acd0: CD-RW <SONY CD-RW CRX160E> at ata1-master using UDMA33
Waiting 5 seconds for SCSI devices to settle
sa0 at ahc0 bus 0 target 6 lun 0
sa0: <ARCHIVE Python 04687-XXX 6580> Removable Sequential Access SCSI-2 device 
sa0: 7.812MB/s transfers (7.812MHz, offset 15)
da2 at ahc0 bus 0 target 5 lun 0
da2: <iomega jaz 1GB H.72> Removable Direct Access SCSI-2 device 
da2: 10.000MB/s transfers (10.000MHz, offset 15)
da2: 1021MB (2091050 512 byte sectors: 64H 32S/T 1021C)
Mounting root from ufs:/dev/ad0s1a
da1 at ahc0 bus 0 target 1 lun 0
da1: <IBM DDRS-39130W S97B> Fixed Direct Access SCSI-2 device 
da1: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled
da1: 8715MB (17850000 512 byte sectors: 255H 63S/T 1111C)
da0 at ahc0 bus 0 target 0 lun 0
da0: <IBM DDRS-34560D DC1B> Fixed Direct Access SCSI-2 device 
da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled
da0: 4357MB (8925000 512 byte sectors: 255H 63S/T 555C)

/etc/make.conf is pretty plain:
HAVE_MOTIF=yes
MAKE_IDEA=YES
COMPAT22=yes
CFLAGS=-O -pipe
NOPROFILE=true
CPUTYPE=i686
KERNCONF=WATTRES
HAVE_GTK=yes

And the kernel config is roughly GENERIC:
#
# WATTRES -- Kernel configuration file for FreeBSD/i386 wattres.Watt.COM
#
# $FreeBSD: src/sys/i386/conf/GENERIC,v 1.246.2.37+ 2001/12/19 18:34:45 iedowse Exp $

machine		i386
##cpu		I386_CPU
##cpu		I486_CPU
##cpu		I586_CPU
cpu		I686_CPU
ident		WATTRES
maxusers	128

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

##options 	MATH_EMULATE		#Support for x87 emulation
##options	DDB
options 	INET			#InterNETworking
options		IPSEC			#IP security
options		IPSEC_ESP		#IP security (crypto; define w/ IPSEC)
##options 	INET6			#IPv6 communications protocols
options 	FFS			#Berkeley Fast Filesystem
options 	FFS_ROOT		#FFS usable as root device [keep this!]
options 	SOFTUPDATES		#Enable FFS soft updates support
options		UFS_DIRHASH		#Improve performance on big directories
options 	MFS			#Memory Filesystem
##options 	MD_ROOT			#MD is a potential root device
##options 	NFS			#Network Filesystem
##options 	NFS_ROOT		#NFS usable as root device, NFS required
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 	SCSI_DELAY=5000		#Delay (in ms) before probing SCSI
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		IPFIREWALL
options		IPFIREWALL_VERBOSE
options		IPFIREWALL_VERBOSE_LIMIT=50
options		IPDIVERT
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
device		fd1	at fdc0 drive 1
#
# If you have a Toshiba Libretto with its Y-E Data PCMCIA floppy,
# don't use the above line for fdc0 but the following one:
#device		fdc0

# 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

# SCSI Controllers
##device		ahb		# EISA AHA1742 family
device		ahc		# AHA2940 and onboard AIC7xxx devices
device		amd		# AMD 53C974 (Tekram DC-390(T))
##device		isp		# Qlogic family
device		ncr		# NCR/Symbios Logic
device		sym		# NCR/Symbios Logic (newer chipsets)
options		SYM_SETUP_LP_PROBE_MAP=0x40
				# Allow ncr to attach legacy NCR devices when 
				# both sym and ncr are configured

##device		adv0	at isa?
##device		adw
##device		bt0	at isa?
##device		aha0	at isa?
##device		aic0	at isa?

device		ncv		# NCR 53C500
device		nsp		# Workbit Ninja SCSI-3
device		stg		# TMC 18C30/18C50

# SCSI peripherals
device		scbus		# SCSI bus (required)
device		da		# Direct Access (disks)
device		sa		# Sequential Access (tape etc)
device		cd		# CD
device		pass		# Passthrough device (direct SCSI access)

# RAID controllers interfaced to the SCSI subsystem
device		asr		# DPT SmartRAID V, VI and Adaptec SCSI RAID
device		dpt		# DPT Smartcache - See LINT for options!
device		mly		# Mylex AcceleRAID/eXtremeRAID

# RAID controllers
##device		aac		# Adaptec FSA RAID, Dell PERC2/PERC3
##device		ida		# Compaq Smart RAID
##device		amr		# AMI MegaRAID
##device		mlx		# Mylex DAC960 family
##device		twe		# 3ware Escalade

# 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

# PCCARD (PCMCIA) support
device		card
device		pcic0	at isa? irq 0 port 0x3e0 iomem 0xd0000
device		pcic1	at isa? irq 0 port 0x3e2 iomem 0xd4000 disable

# 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? port IO_COM3 irq 5
device		sio3	at isa? port IO_COM4 irq 9
device		sio4	at isa? port "0x2F0" irq 11

# Parallel port
device		ppc0	at isa? irq 7
device		ppbus		# Parallel port bus (required)
device		lpt		# Printer
device		plip		# TCP/IP over parallel
device		ppi		# Parallel port interface device
#device		vpo		# Requires scbus and da


# PCI Ethernet NICs.
device		de		# DEC/Intel DC21x4x (``Tulip'')
device		txp		# 3Com 3cR990 (``Typhoon'')
device		vx		# 3Com 3c590, 3c595 (``Vortex'')

# 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
device		fxp		# Intel EtherExpress PRO/100B (82557, 82558)
device		pcn		# AMD Am79C79x PCI 10/100 NICs
device		rl		# RealTek 8129/8139
device		sf		# Adaptec AIC-6915 (``Starfire'')
device		sis		# Silicon Integrated Systems SiS 900/SiS 7016
device		ste		# Sundance ST201 (D-Link DFE-550TX)
device		tl		# Texas Instruments ThunderLAN
device		tx		# SMC 9432TX (83c170 ``EPIC'')
device		vr		# VIA Rhine, Rhine II
device		wb		# Winbond W89C840F
device		wx		# Intel Gigabit Ethernet Card (``Wiseman'')
device		xl		# 3Com 3c90x (``Boomerang'', ``Cyclone'')

# ISA Ethernet NICs.
# 'device ed' requires 'device miibus'
device		ed0	at isa? port 0x280 irq 10 iomem 0xd8000
device		ex
device		ep
device		fe0	at isa? port 0x300
# Xircom Ethernet
device		xe
# PRISM I IEEE 802.11b wireless NIC.
device		awi
# WaveLAN/IEEE 802.11 wireless NICs. Note: the WaveLAN/IEEE really
# exists only as a PCMCIA device, so there is no ISA attachment needed
# and resources will always be dynamically assigned by the pccard code.
device		wi
# Aironet 4500/4800 802.11 wireless NICs. Note: the declaration below will
# work for PCMCIA and PCI cards, as well as ISA cards set to ISA PnP
# mode (the factory default). If you set the switches on your ISA
# card for a manually chosen I/O address and IRQ, you must specify
# those parameters here.
device		an
# The probe order of these is presently determined by i386/isa/isa_compat.c.
device		ie0	at isa? port 0x300 irq 10 iomem 0xd0000
#device		le0	at isa? port 0x300 irq 5 iomem 0xd0000
device		lnc0	at isa? port 0x280 irq 10 drq 0
device		cs0	at isa? port 0x300
device		sn0	at isa? port 0x300 irq 10

# 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		# IPv6 and IPv4 tunneling
##pseudo-device	faith	1	# IPv6-to-IPv4 relaying (translation)
pseudo-device	snp	3	#Snoop device - to look at pty/vty/etc..
pseudo-device	vn		#Vnode driver (turns a file into a device)
pseudo-device	speaker		#Play IBM BASIC-style noises out your speaker

# The `bpf' pseudo-device enables the Berkeley Packet Filter.
# Be aware of the administrative consequences of enabling this!
pseudo-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		umass		# Disks/Mass storage - Requires scbus and da
##device		ums		# Mouse
##device		uscanner	# Scanners
##device		urio		# Diamond Rio MP3 Player
# USB Ethernet, requires mii
##device		aue		# ADMtek USB ethernet
##device		cue		# CATC USB ethernet
##device		kue		# Kawasaki LSI USB ethernet

-- 
Steve Watt KD6GGD  PP-ASEL-IA          ICBM: 121W 56' 57.8" / 37N 20' 14.9"
 Internet: steve @ Watt.COM                         Whois: SW32
   Free time?  There's no such thing.  It just comes in varying prices...

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