Quoting Janusz Krzysztofik (2019-10-23 10:07:51)
> Commit a355b2d6eb42 ("igt/gem_exec_reloc: Filter out unavailable
> addresses for !ppgtt") introduced filtering of addresses possibly
> occupied by other users of shared GTT. Unfortunately, that filtering
> is unconditional, no matter if running on old shared GTT or not. When
> running on PPGTT, that may result in errors other than those intended
> to be skipped over being silently ignored.
You forgot the aliasing-ppgtt which has exactly the same issues with
reserved locations (since it is a mirror of the GGTT).
-Chris
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