[Bug 84501] [IVB/BYT/HSW Bisected]Synmark2_DrvCtx performance reduced 50%~80% (PPGTT)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84501

Eero Tamminen <eero.t.tamminen at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #11 from Eero Tamminen <eero.t.tamminen at intel.com> ---
(In reply to Chris Wilson from comment #10)
> (In reply to Eero Tamminen from comment #8)
> > I don't think there's been any change in how things are tested, and
> > performance numbers both in our own testing and at QA have been for few days
> > about [1] at same level as before.

QA bisected it to this commit:
-----------------------------------------------
commit c5cb5e3bf6f015e38b454c9f7a0db7fd8e9def56
Author:     Daniel Vetter <daniel.vetter at ffwll.ch>
AuthorDate: Wed Oct 22 11:18:51 2014 +0200
Commit:     Daniel Vetter <daniel.vetter at ffwll.ch>
CommitDate: Wed Oct 22 11:18:51 2014 +0200

    Revert "drm/i915: Enable full PPGTT on gen7"
-----------------------------------------------


> What's changed is that full-ppgtt should be disabled again by default.

Ok, so while the feature itself is still buggy, this bug is fixed (by disabling
the buggy feature).  Marking it as such.

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