igt@gem_exec_fence@basic-await-default has hanged on CI on ILK-650. Dmesg: https://intel-gfx-ci.01.org/CI/CI_DRM_2161/fi-ilk-650/igt@gem_exec_fence@basic-await-default.html
Just a data race in the debug, patches on the ml to eliminate it. Affects all platforms.
commit fe49789fab974dd04c0fef26a4ce7f7f411b40dd Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Thu Feb 23 07:44:13 2017 +0000 drm/i915: Deconstruct execute fence
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