Re: [RFC] drm/i915: Add sync framework support to execbuff IOCTL

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On Thu, Jul 02, 2015 at 12:54:27PM +0100, Chris Wilson wrote:
> However, that equally applies to the existing request->seqno. That can
> also be assigned on submission so that it always an ordered timeline, and
> so can be used internally or externally.

Hmm, we need to preallocate seqno space for the request during
i915_gem_request_alloc(). In the noop scheduler, we are then safe to
assign the next available. A reordering scheduler can insert whatever
commands it needs in between batches and wouldn't need to do anything in
the preallocate.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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