[Bug 56916] [965gm regression] Black screen when under high load on kernel 3.7 (was OK on 3.6)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=56916

--- Comment #36 from Chris Wilson <chris at chris-wilson.co.uk> ---
Created attachment 71909
  --> https://bugs.freedesktop.org/attachment.cgi?id=71909&action=edit
Overallocate fenced regions

So, that patch just has the effect of changing the eviction order so that
cached bo are no longer preferentially thrown out. All pointing towards a
latent bug elsewhere.

The error-states in https://bugzilla.redhat.com/show_bug.cgi?id=877461 follow
the same pattern as I've observed with invalid surface sizes (an EU is idle
waiting for the never-returning sampler, whilst all other EU are busy stalling
for the shared resource). So based on that observation, let's attach surface
allocation and please try the attached patch for the DDX (UXA).

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