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2019-08-04drm/i915: Replace struct_mutex for batch pool serialisationChris Wilson1-0/+29
Switch to tracking activity via i915_active on individual nodes, only keeping a list of retired objects in the cache, and reaping the cache when the engine itself idles. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190804124826.30272-2-chris@chris-wilson.co.uk