I've added INVARIANTS and WITNESS to my kernel.  Today I get a random
panic on boot sometimes:

lock order reseral              (this doesn't cause the panic, but
                                does seem to happen all the time)
 1st vnode interlock last acquired @ ../../usr/ffs/ffs_fsops.c:396
 2nd 0xc04837a0 mntvnode @ ../../ufs/ffs/ffs_vfsops.c:457
 3rd 0xc80b9e8c vnode interlock @ ../../kern/vfs_subr.c:1872
kernel trap 12 with interrupts disabled
panic: runq-add: proc 0xc7b28ee0 (fsck_ufs) not SRUN
Stopeed at Debugger+0x44: pushl %ebx
db> trace
Debugger(c03d3c03) at Debugger+0x44
panic(c03d4040,c7b28ee0,c7b290a5,282,c7b2b960) at panic+0x70
runq_add(c046ae20,c7b28ee0,c8a4bcra4,c0221ee5,c7b28ee0) at runq_add+0x40
setrunqueue(c7b28ee0) at setrunqueue+0x10
ithread_schedule(c0f0a00,1) at ithread_schedule+0x129
sched_ithd(e) at sched_ithrd+0x3f
Xresume14() at Xresume14+0x8
--- interrupt, eip = 0xc03830fb, esp = 0x286, ebp = 0xc8a4bd34 ---
trap(18,10,10,73b152,0) at trap+0x9b
calltrap() at calltrap+0x5
--- trap 0xc, eip = 0xc03822e9, esp = 0xc8a4bd7c, ebp = 0xc8a4bd90 ---
sw1b(0,...) at sw1b+0x6b
msleep(...) at msleep+0x588
physio(...) at physio+0x30d
spec_read(...) at spec_read+0x71
ufsspec_read(...) at ufsspec_read+0x20
ufs_noperatespec(...) at ufs_noperatespec+0x15
vn_read(...) at vn_read+0x128
dofileread(...) at dofileread+0xb0
read(...) at read+0x36
syscall(...) at syscall+0x551
Xint0x80_syscall() at Xint0x80_syscall+0x23
--- syscall 0x3, eip = 0x8054770, esp = 0xbfbfef60, ebp = 0xbfbfef9c ---

Anything that I can do to help?  I don't have a core dump of this, but
it is happening often enough to be a pain.


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