Multilevel page tables broken for high addresses

Felix Kuehling felix.kuehling at
Tue Mar 28 20:31:08 UTC 2017

On 17-03-28 04:25 PM, Deucher, Alexander wrote:
> Simple KFD tests that don't use the non-coherent (high) address range
> > seem to be working fine. That tells me that the multi-level page table
> > code has a problem with high addresses.
> >
> > I'll keep digging ...
> Do you have multiple GPUs in the system?  There might be issues since
> some of the vm related settings come from global variables.

No, it's a pure single-GPU Vega10 system.

> Alex

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