panic

[Michael Grant]

On Tue, Jul 15, 2008 at 10:44 PM, Kris Kennaway <kris at freebsd.org> wrote:
> Michael Grant wrote:
>>
>> I have been having panics on one of my machines, roughly every week or
>> so.  I was running 6.3 pre-release and then I updated to 6.3 p2 and I
>> still have the panic, here's the message that appears on the console:
>>
>> panic: kmem_kernel trap 12 with interrupts disabled
>>
>>
>> Fatal trap 12: page fault while in kernel mode
>> cpuid = 2; apic id = 06
>> fault virtual address   = 0x2c
>> fault code              = supervisor read, page not present
>> instruction pointer     = 0x20:0xc06c5a5a
>> stack pointer           = 0x28:0xe6ea49ec
>> frame pointer           = 0x28:0xe6ea4a00
>> code segment            = base 0x0, limit 0xfffff, type 0x1b
>>                        = DPL 0, pres 1, def32 1, gran 1
>> processor eflags        = resume, IOPL = 0
>> current process         = 14 (swi1: net)
>> trap number             = 12
>>
>> Is this possibly a hardware problem?
>
> Yes, but who can say? :)  To complete your bug report please submit a
> backtrace.  See the developers handbook for details.
>
> Kris
>
>

Another crash:

panic: kmem_malloc(16384): kmem_map too small: 335527936 total allocated
cpuid = 0
Uptime: 3d22h55m59s
Dumping 3327 MB (2 chunks)
  chunk 0: 1MB (151 pages) ... ok
  chunk 1: 3327MB (851568 pages) 3311 <--- hangs here

I waited about a half hour before pulling the plug.

Then, during reboot:
...
savecore: error reading last dump header at offset 10005032448 in
/dev/ad1s1b: Input/output error
savecore: no dumps found
Jul 19 15:50:19 charm savecore: error reading last dump header at
offset 10005032448 in /dev/ad1s1b: Input/output error
...

I will wait and see if the next time it crashes I get a better dump,
but in the mean time, still no ideas?

Michael Grant