support new special token #3420

Former-commit-id: f5c6a47f5193ab3a6c137580992bdcce0b31fdd5

src/llmtuner/model/utils/rope.py

@@ -30,6 +30,10 @@ def configure_rope(config: "PretrainedConfig", model_args: "ModelArguments", is_
 
         current_max_length = getattr(config, "max_position_embeddings", None)
         if current_max_length and model_args.model_max_length > current_max_length:
+            logger.warning(
+                "Enlarge max model length from {} to {}.".format(current_max_length, model_args.model_max_length)
+            )
+            setattr(config, "max_position_embeddings", model_args.model_max_length)
             scaling_factor = float(math.ceil(model_args.model_max_length / current_max_length))
         else:
             logger.warning("Input length is smaller than max length. Consider increase input length.")