[Bug 101691] gfx corruption on windowed 3d-apps running on dGPU

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101691

--- Comment #45 from Michel Dänzer <michel at daenzer.net> ---
(In reply to Ben Widawsky from comment #44)
> Provided amdgpu is flushing its contents properly though, the LLC should
> just follow normal coherency snoop protocol and i915 should see the changed
> data.

Since the pages are non-cacheable as far as the amdgpu driver is concerned, the
AMD GPU does not participate in coherency snoop protocol for them AFAIK. It
should flush to them "immediately" though.

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