[Intel-gfx] [PATCH v6 00/19] 48-bit PPGTT

[Chris Wilson]

On Thu, Jul 30, 2015 at 12:52:19PM +0100, Michel Thierry wrote:
> On 7/30/2015 12:26 PM, Chris Wilson wrote:
> >Just a head's up, I haven't root caused this yet, but with
> >i915.enable_ppgtt=2 I started getting GPU hangs that didn't happen
> >before this series...
> 
> Sounds like I screwed up something in the first 4 patches or in the
> Wa32bit one. The rest of the changes are contained to 48-bit code.

It's also likely to be bdw specific since I've been running the same
kernel on snb/ivb/hsw without issue. I just thought I would do a quick
compare of pggtt=3 against pggtt=2 when the problems started.
 
> Have you find a way to reproduce it?

It was in the middle of the ue4 Reflections demo, though it had run
through a sample of other tests seemingly without issue.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre