Quoting Bin Yang (2018-12-20 08:01:35) > Normally, i915_request_alloc() and i915_request_add() will be called > in sequence with drm.struct_mutex locked. But in > intel_vgpu_create_workload(), it will pre-allocate the request and > call i915_request_add() in the workload thread for performance > optimization. The above issue will be triggered.
That's your bug. It's not normally, it's a strict requirement that the struct_mutex (request generation mutex) be held over the course of generating the request. -Chris
