[Intel-gfx] [PATCH v2 05/15] drm/i915/tdr: Prepare execlist submission to handle tdr resubmission after reset

[Chris Wilson]

On Fri, Jun 17, 2016 at 08:09:05AM +0100, Arun Siluvery wrote:
> To resume execution after engine reset we resubmit the context and this
> needs to be treated differently otherwise we would count it as a completely
> new submission. This change modifies the submission path to account for
> this.
> 
> During resubmission we only submit the head request that caused the hang,
> once this is done then we continue with the normally submission of two
> contexts at a time. The intention is to restore the submission state at the
> time of hang.

Why do we want to resubmit the hanging request (with HEAD increment by a
couple of dwords)? Kill the job, move on.

How quickly do you decide to actually abandon the request?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre