kernel panic

[Matthew Dillon]

:Today I updated to the latest HEAD, and I'm getting some kernel panics.
:Unfortunately, the machine hangs when dumping core, but here's a copy/
:paste of the panic message:
:
:Fatal trap 12: page fault while in kernel mode
:mp_lock = 00000000; cpuid = 0; lapic.id = 00000000
:fault virtual address	= 0x544f4c7a
:fault code		= supervisor read, page not present
:instruction pointer	= 0x8:0xc018ff31
:stack pointer		= 0x10:0xde0bd8f8
:frame pointer		= 0x10:0xde0bd908
:code segment		= base 0x0, limit 0xfffff, type 0x1b
:			= DPL 0, pres 1, def32 1, gran 1
:processor eflags	= interrupt enabled, resume, IOPL = 0
:current process		= 848 (python)
:current thread		= pri 70 (CRIT)
:interrupt mask		= bio  <- SMP: XXX
:trap number		= 12
:panic: page fault
:mp_lock = 00000000; cpuid = 0; lapic.id = 00000000
:boot() called on cpu#0
:Uptime: 11m29s
:
:dumping to dev #da/0x20001, offset 378927

    Peter, could you do me a favor and cause the panic to occur
    again?  This time with the debug.trace_on_panic sysctl turned on.

						-Matt