[Bug 78248] [BDW GT3]igt/gem_render_copy costs long time to execute

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78248

Guo Jinxian <jinxianx.guo at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |ASSIGNED

--- Comment #4 from Guo Jinxian <jinxianx.guo at intel.com> ---
755376c1d89fb9b2ec24430d793fc4cc1119c0ab is the first bad commit\
Author:     Ben Widawsky <benjamin.widawsky at intel.com>
AuthorDate: Tue Apr 29 14:52:29 2014 -0700
Commit:     Daniel Vetter <daniel.vetter at ffwll.ch>
CommitDate: Wed Apr 30 14:40:58 2014 +0200

    drm/i915: Virtualize the ringbuffer signal func

    This abstraction again is in preparation for gen8. Gen8 will bring new
    semantics for doing this operation.

    While here, make the writes of MI_NOOPs explicit for non-existent rings.
    This should have been implicit before.

    NOTE: This is going to be removed in a few patches.

    Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
    Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>


The commit unable to revert.

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