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authorChris Wilson <[email protected]>2019-06-12 09:52:46 +0100
committerChris Wilson <[email protected]>2019-06-12 12:06:11 +0100
commit33df8a7697a08ec96811a1e9bbce45c7cdbbc316 (patch)
tree68c4739164b54339de55ee5bb7f3a480f97c953a /tools/perf/scripts/python
parentea60f4bdc4330fc3be90e6a8634b9b912046b09d (diff)
drm/i915: Prevent lock-cycles between GPU waits and GPU resets
We cannot allow ourselves to wait on the GPU while holding any lock as we may need to reset the GPU. While there is not an explicit lock between the two operations, lockdep cannot detect the dependency. So let's tell lockdep about the wait/reset dependency with an explicit lockmap. Signed-off-by: Chris Wilson <[email protected]> Cc: Mika Kuoppala <[email protected]> Cc: Tvrtko Ursulin <[email protected]> Reviewed-by: Mika Kuoppala <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
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