message: Do not register GCS file system when TPU GCS file system option is ON.
diff: @@ -1789,5 +1789,11 @@ Status GcsFileSystem::CreateHttpRequest(std::unique_ptr<HttpRequest>* request) {
  } // namespace tensorflow
  +// The TPU_GCS_FS option sets a TPU-on-GCS optimized file system that allows
  +// TPU pods to function more optimally. When TPU_GCS_FS is enabled then
  +// gcs_file_system will not be registered as a file system since the
  +// tpu_gcs_file_system is going to take over its responsibilities. The tpu file
  +// system is a child of gcs file system with TPU-pod on GCS optimizations.
  +// This option is set ON/OFF in the GCP TPU tensorflow config.
  // Initialize gcs_file_system
  REGISTER_FILE_SYSTEM("gs", ::tensorflow::RetryingGcsFileSystem);
  