[Bug 84662] Long pauses with Unreal demo Elemental on R9270X since : Always flush the HDP cache before submitting a CS to the GPU

https://bugs.freedesktop.org/show_bug.cgi?id=84662

--- Comment #37 from Michel Dänzer michel@daenzer.net --- Comments about Borderlands 2 should go to bug 84570.

(In reply to Andy Furniss from comment #33)

Running patched kernel with unpatched mesa causes signal 7 when running games.

I fixed that in the kernel patch I posted to the dri-devel list.

So I finally convinced myself that using VRAM for PIPE_USAGE_STREAM buffers is not a good idea, at least not at this time, and pushed the Mesa change which makes those use GTT again. But while trying to avoid that, I found and fixed a fair number of other issues, so hopefully the end result will be even better than before. :)