Kernel panic in moea_pvo_to_pte

[Justin Hibbits]

On Dec 7, 2010, at 9:56 AM, Nathan Whitehorn wrote:

>
> On Dec 7, 2010, at 7:23 AM, Justin Hibbits wrote:
>
>> Since I started rebuilding ports yesterday, I've been hit by this  
>> panic
>> (copied from a low-res camera):
>>
>> panic: moea_pvo_to_pte: pvo 0x17e6810 pte does not match pte  
>> 0x26e0740 in
>> moea_pteg_table
>>
>> 0xe52f68a0: at panic+0x13c
>> 0xe52f68f0: at moea_pvo_to_pte+0x154
>> 0xe52f6910: at moea_pvo_remove+0x20
>> 0xe52f6930: at moea_remove+0x94
>> 0xe52f6960: at pmap_remove+0x80
>> 0xe52f6980: at vm_map_delete+0x1d0
>> 0xe52f69e0: at vm_map_remove+0x74
>> 0xe52f6a00: at vmspace_exit+0x108
>> 0xe52f6a30: at exit1+0x48c
>> 0xe52f6a70: at sys_exit+0x1c
>> 0xe52f6a80: at syscallenter+0x258
>> ...
>>
>> The svn version is r215752, I'm currently building r216254 hoping  
>> that might
>> fix something.  This panic seems to occur after about 1-2 hours of  
>> ports
>> building, so is reproducible to me.  I also have the crash dumps  
>> available
>> (2).
>
> This is a serious bug. Could you rebuild the kernel with the  
> attached patch? That should provide some information on why the  
> kernel has triggered this panic. Also, could you provide some more  
> details on your system? I'm guessing it is some variety of G4, but  
> knowing the specific CPU model and whether it is SMP would be very  
> helpful.
> -Nathan
> <test.diff>

Took a couple days, it seems to only crash while building packages  
within the x11/xorg metapackage umbrella, which is odd.... I built all  
of Qt and the rest of my desktop with no crash.

Anyway, the details are:

panic: moea_pvo_to_pte: pvo 0x413f5960 pte does not match pte  
0x2a33340 in moea_pteg_table (0x87399bbf.0x570a0180, 0x87399bf. 
0x570a6012)

And, it is fully reproducible for me just by backing up ports and  
building x11/xorg.

- Justin