Quoting Ewelina Musial (2018-04-11 09:27:12)
> Test have similar functionality that gem_cs_prefetch IGT test
> but gem_cs_prefetch is not up to date and there was an idea
> to move this test to kselftests so this is respond for this
> request.

gem_cs_prefetch itself does one thing: verify that we cannot cross the
page boundary beyond the last page of the GTT. It is about the Command
Streamer prefetch; there is no command streamer here.

gem_cs_prefetch could be simplified by EXEC_OBJECT_PINNED, I think the
notes got muddled up.
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