[PATCH v2 14/15] drm/amdgpu: Use mmu_range_notifier instead of hmm_mirror

[Jason Gunthorpe]

On Tue, Oct 29, 2019 at 07:22:37PM +0000, Yang, Philip wrote:
> Hi Jason,
> 
> I did quick test after merging amd-staging-drm-next with the 
> mmu_notifier branch, which includes this set changes. The test result 
> has different failures, app stuck intermittently, GUI no display etc. I 
> am understanding the changes and will try to figure out the cause.

Thanks! I'm not surprised by this given how difficult this patch was
to make. Let me know if I can assist in any way

Please ensure to run with lockdep enabled.. Your symptops sounds sort
of like deadlocking?

Regards,
Jason