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Date: Fri, 7 Dec 2001 11:07:14 +0100 (CET)
From: Martin Kammerhofer <dada@sbox.tugraz.at>
To: <FreeBSD-gnats-submit@freebsd.org>
Cc: <mkamm@gmx.net>
Subject: kern/32574: ufsdirhash_findfree: bad stats
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>Number:         32574
>Category:       kern
>Synopsis:       ufsdirhash_findfree: bad stats
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Dec 07 02:10:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Martin Kammerhofer
>Release:        FreeBSD 4.4-STABLE i386
>Organization:
Graz Universities
>Environment:
System: FreeBSD homebox.kammerhofer.org 4.4-STABLE FreeBSD 4.4-STABLE #0: Sun Nov 11 20:38:25 CET 2001 toor@homebox.kammerhofer.org:/usr.extra/obj/usr/src/sys/LEND4 i386

Here's a copy of my /var/run/dmesg.boot:
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 4.4-STABLE #0: Sun Nov 11 20:38:25 CET 2001
    toor@homebox.kammerhofer.org:/usr.extra/obj/usr/src/sys/LEND4
Timecounter "i8254"  frequency 1193182 Hz
CPU: Pentium III/Pentium III Xeon/Celeron (801.82-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x686  Stepping = 6
  Features=0x383f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
real memory  = 536858624 (524276K bytes)
avail memory = 518320128 (506172K bytes)
Preloaded elf kernel "kernel" at 0xc03e2000.
VESA: v2.0, 8192k memory, flags:0x1, mode table:0xc0371ae2 (1000022)
VESA: Matrox Graphics Inc.
Pentium Pro MTRR support enabled
md0: Malloc disk
Using $PIR table, 7 entries at 0xc00f0d10
apm0: <APM BIOS> on motherboard
apm: found APM BIOS v1.2, connected at v1.2
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 11
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
uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port 0xd400-0xd41f irq 5 at device 4.2 on pci0
usb0: <Intel 82371AB/EB (PIIX4) USB controller> on uhci0
usb0: USB revision 1.0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
ulpt0: Hewlett-Packard DeskJet 930C, rev 1.00/1.00, addr 2, iclass 7/1
chip1: <Intel 82371AB Power management controller> port 0xe800-0xe80f at device 4.3 on pci0
ahc0: <Adaptec aic7890/91 Ultra2 SCSI adapter> port 0xd000-0xd0ff mem 0xe1000000-0xe1000fff irq 5 at device 6.0 on pci0
aic7890/91: Ultra2 Wide Channel A, SCSI Id=7, 32/255 SCBs
orm0: <Option ROM> at iomem 0xc0000-0xc7fff on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model Generic PS/2 mouse, device ID 0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> on isa0
sc0: VGA <16 virtual consoles, flags=0x200>
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
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
pca0 at port 0x40 on isa0
joy0 at port 0x201 on isa0
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
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
sbc0: <Creative ViBRA16X> at port 0x220-0x22f,0x300-0x301,0x388-0x38b irq 9 drq 0,1 on isa0
pcm0: <SB16 DSP 4.16 (ViBRA16X)> on sbc0
joy1: <Generic PnP Joystick> at port 0x200 on isa0
IPFW: MOD_LOAD
IP packet filtering initialized, divert enabled, rule-based forwarding enabled, default to deny, logging limited to 100 packets/entry by default
DUMMYNET initialized (011031)
ad0: 9671MB <IBM-DTTA-351010> [19650/16/63] at ata0-master UDMA33
ad2: 2067MB <IBM-DAQA-32160> [4200/16/63] at ata1-master WDMA2
afd0: 96MB <IOMEGA ZIP 100 ATAPI> [32/64/96] at ata0-slave using PIO0
Waiting 4 seconds for SCSI devices to settle
Mounting root from ufs:/dev/ad0s3a
cd1 at ahc0 bus 0 target 4 lun 0
cd1: <PLEXTOR CD-R   PX-W4220T 1.02> Removable CD-ROM SCSI-2 device 
cd1: 10.000MB/s transfers (10.000MHz, offset 8)
cd1: Attempt to query device size failed: NOT READY, Medium not present - tray closed
WARNING: / was not properly dismounted
cd0 at ahc0 bus 0 target 3 lun 0
cd0: <PLEXTOR CD-ROM PX-32TS 1.03> Removable CD-ROM SCSI-2 device 
cd0: 20.000MB/s transfers (20.000MHz, offset 15)
cd0: cd present [287149 x 2048 byte records]

And here's a copy of my kernel config file:
machine		i386
ident		LEND4
options		HZ=400
maxusers	128
options		PQ_CACHESIZE=512	# color for 512k/16k cache
options 	INCLUDE_CONFIG_FILE     # Include this file in kernel
cpu		I686_CPU		# aka Pentium Pro(tm)
options         CPU_ENABLE_SSE
options 	CPU_SUSP_HLT
options 	NO_F00F_HACK
options 	COMPAT_43
options 	USER_LDT		#allow user-level control of i386 ldt
options 	SYSVSHM		# include support for shared memory
options 	SYSVSEM		# include support for semaphores
options 	SYSVMSG		# include support for message queues
options 	DDB
options 	KTRACE			#kernel tracing
options 	INVARIANTS
options 	INVARIANT_SUPPORT
options 	PERFMON
options 	UCONSOLE
options 	USERCONFIG		#boot -c editor
options 	VISUAL_USERCONFIG	#visual boot -c editor
options 	INET			#Internet communications protocols
pseudo-device	ether			#Generic Ethernet
pseudo-device	loop			#Network loopback device
pseudo-device	bpf			#Berkeley packet filter
pseudo-device	disc			#Discard device (ds0, ds1, etc)
pseudo-device	tun			#Tunnel driver (ppp(8), nos-tun(8))
options 	IPFIREWALL		#firewall
options 	IPFIREWALL_VERBOSE	#print information about
options 	IPFIREWALL_FORWARD	#enable transparent proxy support
options 	IPFIREWALL_VERBOSE_LIMIT=100	#limit verbosity
options 	IPDIVERT		#divert sockets
options 	IPSTEALTH		#support for stealth forwarding
options 	TCPDEBUG
options		RANDOM_IP_ID
options                ACCEPT_FILTER_DATA
options                ACCEPT_FILTER_HTTP
options 	ICMP_BANDLIM
options 	DUMMYNET
options 	FFS			#Fast filesystem
options 	MFS			#Memory File System
options 	NFS			#Network File System
options 	CD9660			#ISO 9660 filesystem
options 	FDESC			#File descriptor filesystem
options 	KERNFS			#Kernel filesystem
options 	MSDOSFS			#MS DOS File System
options 	PROCFS			#Process filesystem
options 	FFS_ROOT		#FFS usable as root device
options 	SOFTUPDATES
options		UFS_DIRHASH
options 	MD_ROOT
options 	MD_NSECT=40000
options 	NSWAPDEV=5
options 	QUOTA			#enable disk quotas
options 	SUIDDIR
options 	EXT2FS
options 	P1003_1B
options 	_KPOSIX_PRIORITY_SCHEDULING
options 	_KPOSIX_VERSION=199309L
device		scbus			#base SCSI code
device		da			#SCSI direct access devices (aka disks)
device		cd			#SCSI CD-ROMs
device		pass			#CAM passthrough driver
options 	SCSI_DELAY=4000	# Be pessimistic about Joe SCSI device
pseudo-device	pty		#Pseudo ttys
pseudo-device	speaker		#Play IBM BASIC-style noises out your speaker
pseudo-device	gzip		#Exec gzipped a.out's
pseudo-device	vn		#Vnode driver (turns a file into a device)
pseudo-device	md		#Memory/malloc disk
pseudo-device	snp	3	#Snoop device - to look at pty/vty/etc..
options 	LIBICONV
options 	MSGBUF_SIZE=40960
device		isa
device		atkbdc0	at isa? port IO_KBD
device		atkbd0	at atkbdc? irq 1
options 	ATKBD_DFLT_KEYMAP	# specify the built-in keymap
makeoptions	ATKBD_DFLT_KEYMAP="german.iso"
device		psm0	at atkbdc? irq 12
device		vga0	at isa?
options 	VGA_WIDTH90		# support 90 column modes
options 	VESA
pseudo-device	splash
device		sc0	at isa?
options 	MAXCONS=16		# number of virtual consoles
options 	SC_DFLT_FONT		# compile font in
makeoptions	SC_DFLT_FONT=iso
options 	SC_HISTORY_SIZE=2000	# number of history buffer lines
options 	SC_PIXEL_MODE		# add support for the raster text mode
options 	SC_NORM_ATTR="(FG_GREEN|BG_BLACK)"
options 	SC_NORM_REV_ATTR="(FG_YELLOW|BG_GREEN)"
options 	SC_KERNEL_CONS_ATTR="(FG_YELLOW|BG_BLACK)"
options 	SC_KERNEL_CONS_REV_ATTR="(FG_YELLOW|BG_BLUE)"
device		npx0	at nexus? port IO_NPX flags 0x0 irq 13
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
options 	IDE_DELAY=4000	# Be optimistic about Joe IDE device
device		fdc0	at isa? port IO_FD1 irq 6 drq 2
device		fd0	at fdc0 drive 0
device		fd1	at fdc0 drive 1
device		sio0	at isa? port IO_COM1 flags 0x10 irq 4
device		sio1	at isa? port IO_COM2            irq 3
device		pcm
device		sbc
device		pca0 at isa? port IO_TIMER1
device		apm0
device		joy0	at isa? port IO_GAME
device		pci
device		ahc		# AHA2940 and onboard AIC7xxx devices
device		ppc0	at isa? irq 7
device		ppbus
device		vpo
device		lpt
device		plip
device		ppi
device		uhci
device		ohci
device		usb
device		ugen
device		ukbd
device		ulpt
device		ums
device		uscanner
options 	ENABLE_VFS_IOOPT
options 	SHOW_BUSYBUFS	# List buffers that prevent root unmount

>Description:
PANIC during "make -j8 buildworld"

Transscript of panic message:
	panic: ufs_dirhash_findfree: bad stats

Stack trace (function names only):
	Debugger
	panic
	ufs_dirhash_findfree
	ufs_lookup
	ufs_vnoperate
	ufs_cache_lookup
	ufs_vnoperate
	lookup
	namei
	vn_open
	open
	syscall2
	Xint0x80_syscall
	
>How-To-Repeat:
	Not known.
>Fix:
	Removing "options UFS_DIRHASH" from
	the kernel configuration will help.

>Release-Note:
>Audit-Trail:
>Unformatted:

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