(In reply to comment #2)
> Does the test work reliably with that kernel commit reverted?  You don't
> need to adjust the alignment of anything in mesa.  I don't see how that
> commit would cause any regressions.  It just adjusts the alignment of VM
> page table blocks in the kernel driver.  Even if cayman doesn't need 32K VM
> page table alignment, over-aligning shouldn't hurt.

I ran the test 500 times without fail with RADEON_VA=0 with that kernel commit.

I also ran the test 500 times without fail with that kernel commit reverted and
RADEON_VA=1.