[Bug 93029] Hangcheck timer too agressive to pass dEQP for SNBGT1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93029

--- Comment #7 from Mika Kuoppala <mika.kuoppala at intel.com> ---
I tested this with witb bdw ppgtt=1 and execlists=0, as I didn't have
snb available. I reduced the hangcheck tick to 500ms, in order to lure this
condition into light. So yes the setup is far from snb.

But with those changes, I added MI_NOOPs after flush and on multiple
times, the actual head stayed in PIPE_CONTROL for > 500ms.

I will post patches in list so we can continue discussion in there.

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