I'm running into the same problem, mpt(4) panic on FreeBSD 8-STABLE.
I'm running FreeBSD 8.0-STABLE, the current kernel was cvsup'd and built
@ January 14th, 2010. I cvsup'd tonight, 2/25/2010, and built a new
kernel. Attached is the panic when I tried to boot into single user
mode, I was able to boot up on the old kernel built on January 14th.
mpt0:vol0(mpt0:0:0): Using Spare Pool: 0
mpt0:vol0(mpt0:0:0): 2 Members:
(mpt0:1:0:0): Primary Online
(mpt0:1:1:0): Secondary Online
mpt0:vol0(mpt0:0:0): RAID-1 - Optimal
mpt0:vol0(mpt0:0:0): Status ( Enabled )
(mpt0:vol0:0): Physical (mpt0:0:0:0), Pass-thru (mpt0:1:0:0)
(mpt0:vol0:0): Online
(mpt0:vol0:1): Physical (mpt0:0:1:0), Pass-thru (mpt0:1:1:0)
(mpt0:vol0:1): Online
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0x10
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff8019c4bd
stack pointer = 0x28:0xffffff80e81d5ba0
frame pointer = 0x28:0xffffff80e81d5bd0
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 6 (mpt_raid0)
trap number = 12
panic: page fault
cpuid = 0
Uptime: 3s
Cannot dump. Device not defined or unavailable.
Automatic reboot in 15 seconds - press a key on the console to abort
--> Press a key on the console to reboot,
--> or switch off the system now.
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