netbsd-5-beta crash

[6bone%6bone.informatik.uni-leipzig.de@localhost]

hello,

my kernel NetBSD 5.0_BETA crashs sometime with:

vnode @ 0xffff8000a2004630, flags (1030<MPSAFE,LOCKSWORK,XLOCK>)
        tag UNKNOWN(0), type VREG(1), usecount 2, writecount 0, holdcount 
0
        freelisthd 0x0, mount 0xffff800072bd6000, data 0x0 lock 
0xffff8000a20040
panic: dead but not clean
WARNING: SPL NOT LOWERED ON SYSCALL 0 0 EXIT 400 7

WARNING: SPL NOT LOWERED ON SYSCALL 1 -19456 EXIT ffe00000 7
fatal breakpoint trapWARNING: SPL NOT LOWERED ON SYSCALL 8192 18 EXIT 
ffe00000 6
 in supervisor mode
WARNING: SPL NOT LOWERED ON SYSCALL 1 -19456 EXIT ffe00000 7
trap type 1 code 0 rip ffffffff8052c275 cs 8 rflags 246 cr2 
ffff800072081d20 c0
WStARoNppIeNGd :i SnP pL idN OT0 .5L9O WE(sREyDst eONm ) SaYStC AnLetLb s1 
d-:bv

e
db{3}> trace
breakpoint() at netbsd:breakpoint+0x5
panic() at netbsd:panic+0x260
vpanic() at netbsd:vpanic+0x27
vrelel() at netbsd:vrelel+0xad
vget() at netbsd:vget+0x160
qsync() at netbsd:qsync+0xea
ffs_sync() at netbsd:ffs_sync+0x29c
VFS_SYNC() at netbsd:VFS_SYNC+0x33
sync_fsync() at netbsd:sync_fsync+0x76
VOP_FSYNC() at netbsd:VOP_FSYNC+0x71
sched_sync() at netbsd:sched_sync+0x14f
db{3}>


Any ideas what could be the problem?


thank you for your efforts
Uwe