Merging 64 bit changes to -HEAD

[Jayachandran C.]

On Fri, Jul 2, 2010 at 6:24 PM, Luiz Otavio O Souza <lists.br at gmail.com> wrote:
> On Jul 2, 2010, at 8:27 AM, Jayachandran C. wrote:
>> On Fri, Jul 2, 2010 at 4:34 PM, Luiz Otavio O Souza <lists.br at gmail.com> wrote:
>>> On Jul 1, 2010, at 5:04 PM, Jayachandran C. wrote:
>>>>> Looks like I was on the wrong track, it now looks like the pagemask
>>>>> maybe the cause.  My suspicion is that the bootloader setups a
>>>>> pagemask and we never clear it because all the operations save and
>>>>> restore the mask. As far as I can see the TLB exception handler will
>>>>> not update pagemask.
>>>>>
>>>>> Juli - any comments on this? Do you need to save/restore pagemask for
>>>>> some reason, otherwise I will take out the part from tlb.c.  Will send
>>>>> out a patch a bit later.
>>>>
>>>> Okay - here's hopefully the final patch. Let me know if it boots up.
>>>>
>>>> Thanks,
>>>> JC.
>>>> <tlb.c-pagemask-remove.diff>
>>>
>>> JC,
>>>
>>> This patch boots without any problem, thank you !
>>
>> At last! :) Thanks for testing.  Will get it approved, will check-in
>> later today, hopefully.
>>
>> JC.
>
> JC,
>
> Probably too early to talk...
>
> The buildworld is crashing with this backtrace: http://pastebin.com/1M9h1B1v
>
> The function at 8033ba14 is vm_pageout().
>
> Let me try a little bit with older kernels just to make sure.

Is this happening with -HEAD? If it was working before r209243, can
you update to r209243 apply the last patch I sent and see if the issue
is caused by the tlb.c changes.

But from the panic, it looks likely that this is caused by a later
change.  Sorry for the trouble, if the tlb.c changes caused this too,
I will revert it until I have a way of testing on AR71xx boards too.

Thanks
JC.