[Intel-gfx] [PATCH 04/13] drm/i915: track ring progression using seqnos

[Chris Wilson]

On Tue, Feb 26, 2013 at 01:05:07PM +0200, Mika Kuoppala wrote:
> Instead of relying in acthd, track ring seqno progression
> to detect if ring has hung.

This needs a comment that it has a user visible side-effect of limiting
batches to a maximum of 1.5s runtime. Before, that limit was softer in
that we had a chance to spot that the GPU was busy - even if we could be
fooled by an infinite loop.

Did you write an i-g-t for detecting a ring of chained batchbuffers?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre