[PATCH 1/3] drm/radeon: stop poisoning the GART TLB

[Christian König]

Am 01.07.2014 08:48, schrieb Michel Dänzer:
> On 30.06.2014 16:43, Christian König wrote:
>> Am 30.06.2014 08:10, schrieb Michel Dänzer:
>>> On 29.06.2014 19:34, Christian König wrote:
>>>> I've just pushed the branch testing-3.15 to
>>>> git://people.freedesktop.org/~deathsimple/linux. It's based on 3.15.2
>>>> and contains the "stop poisoning the GART TLB" patch backported to 3.15
>>>> and a couple of things that I would like to try.
>>> Running that branch, my Bonaire just survived a piglit run without
>>> lockup. I hope that's an interesting result. :)
>> That's indeed an interesting result. Can you try to figure out which of
>> the patches on the branch did the trick for you?
> The winner is 'drm/radeon: completely over allocate PD and PTs'. That
> patch alone on top of 3.15.2 makes piglit survive on my Bonaire.

Sounds like we either need to align the buffers a bit more, accidentally 
overwrite parts of them or indeed messed up their size calculation 
somewhere.

I've just pushed a new branch testing-3.15-v2 to 
git://people.freedesktop.org/~deathsimple/linux. It only contains the 
two patches already submitted for 3.15 inclusion and the "drm/radeon: 
completely over allocate PD and PTs" patch split into four separate changes.

Please retest and if it still works try once more which change fixed it. 
I'm going to try to purposely un-align the buffers on my bonaire in the 
meantime, maybe I get it to crash as well.

Thanks,
Christian.