Re: Fatal trap 12: page fault while in kernel mode

[Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>]

    That's nasty all right... it's jumped into never never land.
    I can't tell a thing from the crash info.

    What you want to do is to build a kernel with 'options DDB' so you
    drop into ddb> when a panic occurs.  It should be possible to get
    a backtrace from the ddb> prompt or, if not, to examine the stack
    to figure out what routine is responsible for calling never never
    land.  Be sure you have the latest codebase when building a new kernel.

					-Matt
					Matthew Dillon 
					<dillon@xxxxxxxxxxxxx>


:This panic was nasty, the machine didn't reboot by itself and when I
:rebooted it myself savecore couldn't find any coredump. The machine
:was compiling java/jdk14 plus some other port i a screen(1) when the
:panic occured. I've run fbsd current on the same machine for a long
:time without any problems.
:
:I don't know if anything helps since I didn't get a coredump but
:here it is:
:
:dmesg:          http://people.su.se/~rnyberg/dfcrash/dmesg.boot
:kernel config:  http://people.su.se/~rnyberg/dfcrash/MURMELDJUR
:
:---- Transcribed panic message
:Fatal trap 12: page fault while in kernel mode
:mp_lock = 00000001; cpuid = 1l lapic.id = 03000000
:fault virtual address           = 0x52504e53
:fault code                      = supervisor read, page not present
:instruction pointer             = 0x8:0x52504e53
:stack pointer                   = 0x10:0xdc1f188c
:frame pointer                   = 0x10:0xdc1f18c4
:code segment                    = base 0x10, limit 0xfffff, type 0x1b
:                                = DPL 0, pres 1, def32 1, gran 1
:processor eflags                = interrupt enabled, resume, IOPL=0
:current process                 = 69501 (make)
:current thread                  = pri 70 (CRIT)
:interrupt mask                  = bio <- SMP: XXX
:trap number                     = 12
:panic: page fault
:mp_lock = 00000001; cpuid = 1l lapic.id = 03000000
:boot() called on cpu#1
:
:Syncing disks...
:---- EOTPM
:
:        -Richard