[Intel-gfx] [PATCH] drm/i915: Use a dummy timeline name for a signaled fence

[Chris Wilson]

On Thu, Mar 30, 2017 at 12:16:14PM +0100, Chris Wilson wrote:
> Michał Winiarski pointed out that the debugging infrastructure (such as
> trace_dma_fence_release) likes to pretty print the timeline name, long
> after we have freed the timeline. Our timelines currently live as part of
> the GTT (due to the strict ordering we current use through each) which
s/current/currently/

> belong to the context. We aim to free the context and release its
> hardware resources as soon as we able to (i.e. when the last
> fence/request using it has been signaled and retired). As the
> .get_timeline_name is purely a debug feature, rather than extending the
> lifetime of the context, or splitting it into many different release
> phases just to keep the name along, replace the timeline name with a
s/along/around/

> constant after the fence has been signaled. This avoids the potential
> use-after-free.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre