[Bug 110228] [cfl] GPU hang when running UE4Editor

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110228

--- Comment #34 from Jason Ekstrand <jason at jlekstrand.net> ---
I've done a bunch of poking at this including running it on Windows (where it
doesn't hang) and getting an aub capture.  There's nothing obvious that we're
really doing differently. :-(  I'm guessing there's some L3$ chicken bit we're
missing somewhere.

I also experimented with reworking the test to use a fragment shader instead of
a compute shader and was able to reproduce the hang with FS as well.  This
eliminates any it's some GPGPU workaround we're missing.

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