tmpfs panic: wrong vnode type 0xffffff008547ab10

Hi,

I tried to run my tinderbox with the build directory on tmpfs but the
system panics with wrong vnode type 0xffffff008547ab10.

This panic is reproducible when mounting the build directory with tmpfs
and trying to build a port like gcc or openoffice with tinderbox.

System was updated today:
FreeBSD tindi.chruetertee.ch 8.0-BETA1 FreeBSD 8.0-BETA1 #1: Fri Jul 10
09:35:41 CEST 2009
root_at_tindi.chruetertee.ch:/usr/obj/usr/src/sys/GENERIC  amd64

I know tmpfs is still experimental but maybe someone would like to have
a look at this panic.

crashinfo is available here: http://tmp.chruetertee.ch/core.txt.1

Thanks,
Beat

Backtrace:
(kgdb) bt
#0  doadump () at pcpu.h:223
#1  0xffffffff80577043 in boot (howto=260) at
/usr/src/sys/kern/kern_shutdown.c:419
#2  0xffffffff805774cc in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:575
#3  0xffffffff801d1c17 in db_panic (addr=Variable "addr" is not available.
) at /usr/src/sys/ddb/db_command.c:478
#4  0xffffffff801d20c1 in db_command (last_cmdp=0xffffffff80bcfaa0,
cmd_table=Variable "cmd_table" is not available.
) at /usr/src/sys/ddb/db_command.c:445
#5  0xffffffff801d2310 in db_command_loop () at
/usr/src/sys/ddb/db_command.c:498
#6  0xffffffff801d42b9 in db_trap (type=Variable "type" is not available.
) at /usr/src/sys/ddb/db_main.c:229
#7  0xffffffff805a6d85 in kdb_trap (type=3, code=0,
tf=0xffffff80ed19d0e0) at /usr/src/sys/kern/subr_kdb.c:534
#8  0xffffffff8084eaf1 in trap (frame=0xffffff80ed19d0e0) at
/usr/src/sys/amd64/amd64/trap.c:613
#9  0xffffffff80834993 in calltrap () at
/usr/src/sys/amd64/amd64/exception.S:224
#10 0xffffffff805a6f5d in kdb_enter (why=0xffffffff809454c9 "panic",
msg=0xa <Address 0xa out of bounds>) at cpufunc.h:63
#11 0xffffffff805774db in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:558
#12 0xffffffff805f4742 in cache_enter (dvp=0xffffff0085086938,
vp=0xffffff008547ab10, cnp=0xffffff80ed19d918) at
/usr/src/sys/kern/vfs_cache.c:703
#13 0xffffffff81226255 in tmpfs_lookup (v=Variable "v" is not available.
) at /usr/src/sys/modules/tmpfs/../../fs/tmpfs/tmpfs_vnops.c:181
#14 0xffffffff805f59a0 in vfs_cache_lookup (ap=Variable "ap" is not
available.
) at vnode_if.h:80
#15 0xffffffff80897775 in VOP_LOOKUP_APV (vop=0xffffffff8122c080,
a=0xffffff80ed19d450) at vnode_if.c:123
#16 0xffffffff805fc57d in lookup (ndp=0xffffff80ed19d8c0) at vnode_if.h:54
#17 0xffffffff805fd537 in namei (ndp=0xffffff80ed19d8c0) at
/usr/src/sys/kern/vfs_lookup.c:259
#18 0xffffffff80613d33 in vn_open_cred (ndp=0xffffff80ed19d8c0,
flagp=0xffffff80ed19d9c8, cmode=0, vn_open_flags=Variable
"vn_open_flags" is not available.
) at /usr/src/sys/kern/vfs_vnops.c:188
#19 0xffffffff805f844f in vop_stdvptocnp (ap=Variable "ap" is not available.
) at /usr/src/sys/kern/vfs_default.c:727
#20 0xffffffff805f492e in vn_vptocnp_locked (vp=0xffffff80ed19dab0,
cred=0xffffff000498e600,
    buf=0xffffff0002a30000
"ÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­Þ"...,
buflen=0xffffff80ed19daac) at vnode_if.h:1544
#21 0xffffffff805f4bae in vn_fullpath1 (td=0xffffff0004d0c720,
vp=0xffffff0085086938, rdir=0xffffff00042efce8,
    buf=0xffffff0002a30000
"ÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­ÞÞÀ­Þ"...,
retbuf=0xffffff80ed19db10, buflen=1023) at
/usr/src/sys/kern/vfs_cache.c:1172
#22 0xffffffff805f4f84 in kern___getcwd (td=0xffffff0004d0c720,
buf=0x7fffffffe350 <Address 0x7fffffffe350 out of bounds>,
bufseg=UIO_USERSPACE, buflen=1024)
    at /usr/src/sys/kern/vfs_cache.c:937
#23 0xffffffff8084e4af in syscall (frame=0xffffff80ed19dc80) at
/usr/src/sys/amd64/amd64/trap.c:984
#24 0xffffffff80834c71 in Xfast_syscall () at
/usr/src/sys/amd64/amd64/exception.S:373
#25 0x0000000800935cac in ?? ()