type runtime.gcMarkWorkerMode

4 uses

	runtime (current package)
		mgc.go#L225: type gcMarkWorkerMode int
		mgc.go#L230: 	gcMarkWorkerNotWorker gcMarkWorkerMode = iota
		mgcpacer.go#L919: func (c *gcControllerState) logWorkTime(mode gcMarkWorkerMode, duration int64) {
		runtime2.go#L688: 	gcMarkWorkerMode gcMarkWorkerMode