[Bug 87726] [BDW Bisected] OglDrvCtx performance reduced by ~30% after use true PPGTT in Gen8+

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87726

--- Comment #9 from Chris Wilson <chris at chris-wilson.co.uk> ---
Fwiw, we are about half-way through the outstanding patches to fix (as far as
we can) in the driver. There will be some remaining overhead from switching
pagetables in the hw that we cannot hide.

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