Re: [PATCH 2/5] drm/i915/gtt: Combine marking engines dirty with wmb

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Quoting Mika Kuoppala (2018-05-07 17:52:19)
> It is a common pattern to mark the tlbs dirty along with flushing
> the writes. Introduce gen6_ppgtt_invalidate for this.

It wasn't that common at all. We were careful not to do more wmb() than
required before; not so now.
-Chris
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