[PATCH 2/2] drm/amdgpu: bind GTT on demand

[Christian König]

Am 22.09.2016 um 23:54 schrieb Andy Furniss:
> Marek Olšák wrote:
>> This breaks Tonga such that it hangs. Reproducible quickly with:
>>
>> R600_DEBUG=testdma glxgears
>>
>> It's a randomized test that runs forever. It should hang within 2 
>> seconds.
>
> So what is the status of this now?

The status is that I'm hammering my head on the desk for two weeks now 
what the heck is going wrong here.

What I've found so far is that a VM update command doesn't have the 
result it should have, but I absolutely don't understand what happens here.

The good news is that it's 100% reproducible and I already found and 
fixed two bugs.

If you have any idea or more testing results what is going wrong here 
please let me know.

If we can't fix this before the 4.9 release we are just going to revert 
the patch causing this.

Regards,
Christian.

>
> R600_DEBUG=testdma glxgears isn't a test I've run on my r9285 tonga
> until I, by luck, saw this.
>
> On agddf 4.9-wip at post time it did hang/reboot after 2 seconds.
>
> On every update since it's still hung though now it takes longer.
>
> Todays update tested both on head and reset on to the drm-next tag
> still hang.
>
> Going back over older 4.9-wips it's one built on 26th August that is
> the first not to hang.
>
>
>
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