Hi DES, John,

It does not lock the box completly, but it still panics. Sorry.

DDB over serial connection:


lock order reversal
 1st 0xc04a8e80 sched lock @ /usr/src/sys/kern/kern_mutex.c:319
 2nd 0xc049d8a0 sio @ /usr/src/sys/dev/sio/sio.c:2958
kernel trap 12 with interrupts disabled

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x123423bd
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc024d74a
stack pointer           = 0x10:0xcdc4dc70
frame pointer           = 0x10:0xcdc4dc7c
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 12 (swi6: tty:sio clock)
kernel: type 12 trap, code=0
Stopped at      _mtx_lock_sleep+0x14e:  movb    0x45(%eax),%al
db> trace
_mtx_lock_sleep(cf610f10,0,c03c7966,27b) at _mtx_lock_sleep+0x14e
_mtx_lock_flags(cf610f10,0,c03c7966,27b,6) at _mtx_lock_flags+0x79
realitexpire(cf610d04) at realitexpire+0x24
softclock(0) at softclock+0x136
ithread_loop(c24ced00,cdc4dd48,c24ced00,c02470b8,0) at ithread_loop+0x12a
fork_exit(c02470b8,c24ced00,cdc4dd48) at fork_exit+0x58


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