panic: unmount: dangling vnode

[Kris Kennaway]

HEAD from a few days ago on a SMP machine:

panic: unmount: dangling vnode
cpuid = 0
KDB: enter: panic
[thread pid 33932 tid 100296 ]
Stopped at      kdb_enter+0x30: leave
db> wh
Tracing pid 33932 tid 100296 td 0xc649a8a0
kdb_enter(c06f4b02,0,c06fd194,f7e19c78,c649a8a0) at kdb_enter+0x30
panic(c06fd194,f7e19c8c,c0588d42,c07a34e8,c9ebfb18) at panic+0x13e
vfs_mount_destroy(c59c4000,c649a8a0,0,3de,0) at vfs_mount_destroy+0x25
dounmount(c59c4000,8000000,c649a8a0,37d,54fffc6) at dounmount+0x45b
unmount(c649a8a0,f7e19d14,c070fe19,3ad,2) at unmount+0x26e
syscall(2f,bfbf002f,bfbf002f,804a619,bfbfe75a) at syscall+0x271
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (22, FreeBSD ELF32, unmount), eip = 0x280bb7af, esp = 0xbfbfe4ec, ebp = 0xbfbfe5a8 ---
db>

Kris
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