On Tue, Jul 21, 2015 at 11:07:20AM +0200, Daniel Vetter wrote:
> On Tue, Jul 21, 2015 at 10:58:50AM +0200, Krzysztof Kolasa wrote:
> > On 21.07.2015 10:41, Daniel Vetter wrote:
> > > I meant whether you can reset the bad commit and it's immediate parent
> > > extensively to make sure the bisect is really correct. gpu's occasionally
> > > take a while to hang themselves, so could be that the bisect was
> > > mislead somewhere.
> > 
> > 
> > Again I will bisect, more testing good sections.
> > 
> > At the moment on my old laptop, the latest official, properly working 
> > kernel is 4.1.2
> 
> You don't need to redo the full bisect, only retest the bad and the parent
> of the bad extensively. That's enough to confirm the bisect result for
> sure.

The bisection is misleading. It's a missing write-barrier.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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