Panic: Page not present: RELENG_6

[Larry Rosenman]

On Fri, 24 Aug 2007, Gavin Atkinson wrote:

> On Wed, 2007-08-01 at 10:06 -0500, Larry Rosenman wrote:
>> On Wed, 1 Aug 2007, Gavin Atkinson wrote:
>>
>>> On Fri, 27 Jul 2007, Larry Rosenman wrote:
>>>
>>>> Fatal trap 12: page fault while in kernel mode
>>>> cpuid = 0; apic id = 00
>>>> fault virtual address   = 0xffff803fff800058
>>>> fault code              = supervisor read data, page not present
>>>> instruction pointer     = 0x8:0xffffffff803abb0e
>>>> stack pointer           = 0x10:0xffffffffb5ebfa40
>>>> frame pointer           = 0x10:0xffffffffb5ebfa90
>>>> 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         = 57526 (sshd)
>>>> trap number             = 12
>>>> panic: page fault
>>>> cpuid = 2
>>>> KDB: stack backtrace:
>>>> panic() at panic+0x253
>>>> trap_fatal() at trap_fatal+0x2c6
>>>> trap_pfault() at trap_pfault+0x243
>>>> trap() at trap+0x298
>>>> calltrap() at calltrap+0x5
>>>> --- trap 0xc, rip = 0xffffffff803abb0e, rsp = 0xffffffffb5ebfa40, rbp =
>>>> 0xffffffffb5ebfa90 ---
>>>> pmap_remove_pages() at pmap_remove_pages+0xde
>>>> vmspace_exit() at vmspace_exit+0x9a
>>>> exit1() at exit1+0x38c
>>>> sys_exit() at sys_exit+0xe
>>>> syscall() at syscall+0x437
>>>> Xfast_syscall() at Xfast_syscall+0xa8
>>>> --- syscall (1, FreeBSD ELF64, sys_exit), rip = 0x8016a096c, rsp =
>>>> 0x7fffffffc038, rbp = 0x53c240 ---
>>>> Uptime: 36d18h48m54s
>>>
>>> How recent is the source used to build this kernel?
>>>
>> June 18th.
>
> I don't think it is what I suspected it might be then.  Can you recreate
> it with newer sources?
>
> Gavin
>
I haven't seen it again, and the system is currently running sources from:

FreeBSD thebighonker.lerctr.org 6.2-STABLE FreeBSD 6.2-STABLE #1: Sat Aug  4 14:32:38 CDT 2007     root at thebighonker.lerctr.org:/usr/obj/usr/src/sys/THEBIGHONKER  amd64

August 4.

Thanks!

LER

-- 
Larry Rosenman                     http://www.lerctr.org/~ler
Phone: +1 512-248-2683                 E-Mail: ler at lerctr.org
US Mail: 430 Valona Loop, Round Rock, TX 78681-3893