[igt-dev] [PATCH] selftests/i915_gem_gtt: Create igt_ggtt_scratch subtest

[Ewelina Musial]

On Wed, Apr 11, 2018 at 09:48:21AM +0100, Chris Wilson wrote:
> 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.
> -Chris

Probably you are right. I focused on some other point of view. My test is checking
that if we cross the boundary beyond the last page values are stored in scratch.
Do you think that is totally unrelated to gem_cs_prefetch?
Thanks,
Ewelina