feat: Add flexible validation for partial weight updates (#9663)

Co-authored-by: RichardW <rich-junwang@users.noreply.github.com>
Co-authored-by: Zhuorany <yzr1914001753@gmail.com>
Co-authored-by: Stefan He <hebiaobuaa@gmail.com>
Co-authored-by: Yineng Zhang <me@zhyncs.com>
Co-authored-by: Night <32424487+PrinsYin@users.noreply.github.com>
Co-authored-by: zhaochenyang20 <zhaochen20@outlook.com>
Co-authored-by: Liangsheng Yin <hnyls2002@gmail.com>

python/sglang/srt/models/gpt_oss.py

@@ -1029,10 +1029,6 @@ class GptOssForCausalLM(nn.Module):
         )
 
         params_dict = dict(self.named_parameters())
-        params_checker = {k: False for k, v in params_dict.items()}
-
-        for other_loaded_param_name in other_loaded_param_names:
-            params_checker[other_loaded_param_name] = True
 
         for name, loaded_weight in weights:
             loaded_weight = _WeightCreator.maybe_materialize(loaded_weight)
@@ -1069,7 +1065,6 @@ class GptOssForCausalLM(nn.Module):
                 param = params_dict[name]
                 weight_loader = param.weight_loader
                 weight_loader(param, loaded_weight, shard_id)
-                params_checker[name] = True
                 break
             else:
                 for mapping in expert_params_mapping:
@@ -1092,7 +1087,6 @@ class GptOssForCausalLM(nn.Module):
                         name,
                         shard_id=shard_id,
                     )
-                    params_checker[name] = True
                     break
                 else:
                     if name.endswith(".bias") and name not in params_dict:
@@ -1111,17 +1105,9 @@ class GptOssForCausalLM(nn.Module):
                                 param, "weight_loader", default_weight_loader
                             )
                             weight_loader(param, loaded_weight)
-                        params_checker[name] = True
                     else:
                         logger.warning(f"Parameter {name} not found in params_dict")
 
-        not_loaded_params = [k for k, v in params_checker.items() if not v]
-        if tp_rank == 0:
-            if len(not_loaded_params) > 0:
-                raise Exception(f"Not all parameters loaded: {not_loaded_params}")
-            else:
-                logging.info("All parameters loaded successfully.")
-
     def get_embed_and_head(self):
         return self.model.embed_tokens.weight, self.lm_head.weight