panic: unmount: dangling vnode

John Hay jhay at
Thu Aug 26 06:51:25 PDT 2004


I'm trying to upgrade my May-month-current box to 5.3-BETA and rebooting
in multi-user mode with a new kernel+modules and with old or new
/sbin/vinum produces the panic:

panic: unmount: dangling vnode

The interesting thing is if I boot in single-user mode and do the

mount -u -w /
mount -u -r /

The box will then happily go into multiusermode and everything seems
to work just fine. If i skip the two mount commands, it will panic
just as if you boot directly into multi-user mode.

Incase it matters, I have /usr /var and /home as vinum partitions.

Anybody got any ideas?

John Hay -- John.Hay at / jhay at

OK boot
/boot/kernel/acpi.ko text=0x406a8 data=0x1bc4+0x110c syms=[0x4+0x72d0+0x4+0x9754]
GDB: no debug ports present
KDB: debugger backends: ddb
KDB: current backend: ddb
Copyright (c) 1992-2004 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 5.3-BETA1 #5: Thu Aug 26 12:55:54 SAST 2004
    jhay at
WARNING: WITNESS option enabled, expect reduced performance.
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Pentium(R) 4 CPU 1.80GHz (1794.19-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf12  Stepping = 2
real memory  = 1073180672 (1023 MB)
avail memory = 1044926464 (996 MB)
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <DELL GX240  > on motherboard
acpi0: Power Button (fixed)
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x808-0x80b on acpi0
cpu0: <ACPI CPU> on acpi0
acpi_button0: <Power Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
agp0: <Intel 82845 host to AGP bridge> mem 0xe8000000-0xebffffff at device 0.0 on pci0
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <display, VGA> at device 0.0 (no driver attached)
pcib2: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci2: <ACPI PCI bus> on pcib2
xl0: <3Com 3c905C-TX Fast Etherlink XL> port 0xdc80-0xdcff mem 0xff7ffc00-0xff7ffc7f irq 5 at device 12.0 on pci2
miibus0: <MII bus> on xl0
ukphy0: <Generic IEEE 802.3u media interface> on miibus0
ukphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
xl0: Ethernet address: 00:06:5b:55:e8:51
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel ICH2 UDMA100 controller> port 0xffa0-0xffaf,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 31.1 on pci0
ata0: channel #0 on atapci0
ata1: channel #1 on atapci0
uhci0: <Intel 82801BA/BAM (ICH2) USB controller USB-A> port 0xff80-0xff9f irq 9 at device 31.2 on pci0
usb0: <Intel 82801BA/BAM (ICH2) USB controller USB-A> 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
ufm0: GemTek Corp USB FM Radio, rev 1.00/4.10, addr 2
ichsmb0: <Intel 82801BA (ICH2) SMBus controller> port 0xccd0-0xccdf irq 10 at device 31.3 on pci0
ichsmb0: [GIANT-LOCKED]
smbus0: <System Management Bus> on ichsmb0
smb0: <SMBus generic I/O> on smbus0
uhci1: <Intel 82801BA/BAM (ICH2) USB controller USB-B> port 0xff60-0xff7f irq 9 at device 31.4 on pci0
usb1: <Intel 82801BA/BAM (ICH2) USB controller USB-B> on uhci1
usb1: USB revision 1.0
uhub1: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
pcm0: <Intel ICH2 (82801BA)> port 0xcc40-0xcc7f,0xc800-0xc8ff irq 10 at device 31.5 on pci0
pcm0: <Analog Devices AD1885 AC97 Codec>
fdc0: <floppy drive controller> port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on acpi0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model IntelliMouse, device ID 3
sio0 port 0x3f8-0x3ff irq 4 on acpi0
sio0: type 16550A, console
sio1 port 0x2f8-0x2ff irq 3 on acpi0
sio1: type 16550A
ppc0 port 0x778-0x77f,0x378-0x37f irq 7 on acpi0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/8 bytes threshold
ppbus0: <Parallel port bus> on ppc0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
orm0: <ISA Option ROMs> at iomem 0xca000-0xcbfff,0xc0000-0xc9fff on isa0
sc0: <System console> on isa0
sc0: VGA <16 virtual consoles, flags=0x0>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounter "TSC" frequency 1794187912 Hz quality 800
Timecounters tick every 10.000 msec
ad0: 38166MB <ST340016A/3.10> [77545/16/63] at ata0-master UDMA100
ad1: 38166MB <ST340016A/3.10> [77545/16/63] at ata0-slave UDMA100
ATAPI_RESET time = 20us
ATAPI_RESET time = 30us
acd0: DVDROM <_NEC DV-5800A/1.0A> at ata1-master UDMA33
acd1: CDRW <_NEC CD-RW NR-7900A/1.08> at ata1-slave UDMA33
pcm0: measured ac97 link rate at 55942 Hz
Mounting root from ufs:/dev/ad0s1a
Loading configuration files.
Entropy harvesting: interrupts ethernet point_to_point.
vinum: loaded
panic: unmount: dangling vnode
KDB: enter: panic
[thread 100043]
Stopped at      kdb_enter+0x2b: nop
db> tr
kdb_enter(c05d92b0) at kdb_enter+0x2b
panic(c05e1047,c1f7c205,e4a709e8,c04e877b,c1fad800) at panic+0xbb
vfs_mount_destroy(c1fad800,c1eaddc0) at vfs_mount_destroy+0x1d
getdiskbyname(c1f7c200,e4a70a14,c04b8ab5,61,c1f7c200) at getdiskbyname+0x173
open_drive(c1f7c200,c1eaddc0,0,c2197247,c1f7c200) at open_drive+0x21
init_drive(c1f7c200,0,61,1,c1f7c200) at init_drive+0x1c
read_drive_label(c1f7c200,0,e4a70a74,2,61) at read_drive_label+0x11
check_drive(c1f7e800,c1f7e808,408,c21a3f26,1) at check_drive+0x4c
vinum_scandisk(c1f81b10,c1fad000,c218d210,c2125b00,e4a70b3c) at vinum_scandisk+0x220
vinum_super_ioctl(c2125b00,c400464b,c1fad000,c0629500,1) at vinum_super_ioctl+0x4d0
vinumioctl(c2125b00,c400464b,c1fad000,3,c1eaddc0) at vinumioctl+0x39
spec_ioctl(e4a70b88,e4a70c34,c04f5c77,e4a70b88,c0620520) at spec_ioctl+0x152
spec_vnoperate(e4a70b88) at spec_vnoperate+0x13
vn_ioctl(c215f374,c400464b,c1fad000,c1e5fe00,c1eaddc0) at vn_ioctl+0x19f
ioctl(c1eaddc0,e4a70d14,3,5,292) at ioctl+0x3e0
syscall(2f,2f,2f,0,1) at syscall+0x217
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (54, FreeBSD ELF32, ioctl), eip = 0x82a0b4b, esp = 0xbfbfe4cc, ebp = 0xbfbfe8f8 ---
db> reset

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