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fix value head model resuming

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Former-commit-id: ccf0b65d886c09c7c49977c43b0544fe1bfcc258
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hiyouga 2023-11-20 19:01:37 +08:00
parent adf2730d1d
commit bcd661afa6
1 changed files with 1 additions and 0 deletions
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src/llmtuner/model/loader.py
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@ -202,6 +202,7 @@ def load_model_and_tokenizer(
if stage in ["rm", "ppo"]:
model: "AutoModelForCausalLMWithValueHead" = AutoModelForCausalLMWithValueHead.from_pretrained(model)
setattr(model, "_keys_to_ignore_on_save", [name for name, _ in model.named_parameters() if "pretrained_model" in name])
setattr(model, "tie_weights", MethodType(lambda _: None, model))
vhead_path = (
model_args.checkpoint_dir[-1] if model_args.checkpoint_dir is not None else model_args.model_name_or_path
)