Quoting Patchwork (2019-06-24 09:55:07)
> #### Possible regressions ####
>
> * igt@gem_ctx_switch@basic-queue-heavy:
> - shard-skl: [PASS][1] -> [INCOMPLETE][2]
> [1]:
> https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6331/shard-skl4/igt@gem_ctx_swi...@basic-queue-heavy.html
> [2]:
> https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13401/shard-skl6/igt@gem_ctx_swi...@basic-queue-heavy.html
Fwiw, this smells like a use-after-free that does not appear before
drm/i915: Protect request retirement with timeline->mutex
My guess is that I dropped a reference and freed an active request,
though I haven't yet found the hole.
-Chris
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