Panic at shutdown

Hello,


With 8.0-CURRENT from yesterday (Wed Sep  3 21:49:10 CEST 2008) on an
i386 laptop with the following kernel config:

include     GENERIC
cpu			I686_CPU
ident		LENOVO
nodevice	cpufreq
nodevice    sbp
nodevice    fwe
nodevice    fwip

I get a panic (hand transcripted below) on every reboot:

All buffers synced.

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0xc
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0x80e281d9
stack pointer           = 0x28:0x84dfba70
frame pointer           = 0x28:0x84dfba8c
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 1 (init)
[thread pid 1 tid 100002 ]
Stopped at      gfs_dir_create+0x39:    movl    $0,0xc(%ebx)
db> trace
Tracing pid 1 tid 100002 td 0x850afd20
gfs_dir_create(7c,858c3430,85834a80,80ea89c0,0,...) at gfs_dir_create+0x39
zfsctl_mknode_snapdir(858c3430,80e9fa03,275,25d,861049a0,...) at zfsctl_mknode_snapdir+0x53
gfs_dir_lookup(858c3430,80ea5171,84dfbb68,80ac8818,84dfbb34,...) at gfs_dir_lookup+0x1bf
zfsctl_root_lookup(858c3430,80ea5171,84dfbb68,0,0,...) at zfsctl_root_lookup+0xc5
zfsctl_umount_snapshots(85834a80,80000,8509a600,80e918b5,85803044,...) at zfsctl_umount_snapshots+0x4e
zfs_umount(85834a80,80000,850afd20,850afd20,0,...) at zfs_umount+0x52
dounmount(85834a80,80000,850afd20,ad0e5830,0,...) at dounmount+0x4f3
vfs_unmountall(80b72886,0,80b72925,117,84dfbc50,...) at vfs_unmountall+0x33
boot(850afd20,8,0,fffffffe,850afd20,...) at boot+0x439
reboot(850afd20,84dfbcf8,4,0,e,...) at reboot+0x67
syscall(84dfbd38) at syscall+0x325
Xint0x80_syscall() at syscall+0x20
--- syscall (55, FreeBSD ELF32, reboot), eip = 0x8051103, esp = 0x7fbfe8bc, ebp = 0x7fbfe998 ---

This is my ZFS setup:

NAME          USED  AVAIL  REFER  MOUNTPOINT
pool         51.4G  52.0G    24K  /pool
pool/bunker  14.1M  52.0G  14.1M  /bunker
pool/doc     25.1M  52.0G  25.1M  /usr/doc
pool/home    38.6G  52.0G  38.6G  /home
pool/tmp     52.5K   512M  52.5K  /tmp
pool/usr     12.5G  52.0G  12.5G  /usr
pool/var      253M  1.75G   253M  /var

NAME                    SIZE    USED   AVAIL    CAP  HEALTH     ALTROOT
pool                    105G   51.4G   53.6G    48%  ONLINE     -

The root filesystem is on UFS:

# Device		Mountpoint	FStype	Options		Dump	Pass#
/dev/ad4s1b		none		swap	sw		0	0
/dev/ad4s1a		/		ufs	rw		1	1

If there is any other information I could provide, please let me know.
Regards,

-- 
  bug