[Intel-gfx] [PATCH] drm/i915: Use mmio flips harder

[Chris Wilson]

On Wed, Nov 26, 2014 at 04:45:03PM +0000, Chris Wilson wrote:
> On Wed, Nov 26, 2014 at 05:25:32PM +0100, Daniel Vetter wrote:
> > Somehow (i.e. purely experimental evidence from users out there in the
> > wild) using CS flips seems to be implicated in hw context switch
> > hangs.
> > 
> > I have no idea why, but let's just try this out.
> > 
> > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78960
> 
> > References: https://bugs.freedesktop.org/show_bug.cgi?id=83677
> 
> I tried using mmio flips exclusively on Simon's testcase (which is
> perphaps the most brutal as it still dies with the oneline fix that
> worked on the chromeboox).
... and the testcase still dies in under 2 minutes.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre