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Fix num layers in fine tune (#1294)

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Awni Hannun 2025-02-20 13:32:01 -08:00 committed by GitHub
parent 1cbf5cdac7
commit 85669451d0
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2 changed files with 8 additions and 7 deletions
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8
llms/mlx_lm/lora.py
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@ -181,8 +181,14 @@ def train_model(
training_callback: TrainingCallback = None,
):
model.freeze()
if args.num_layers > len(model.layers):
raise ValueError(
f"Requested to train {args.num_layers} layers "
f"but the model only has {len(model.layers)} layers."
)
if args.fine_tune_type == "full":
for l in model.layers[-min(args.num_layers, 0) :]:
for l in model.layers[-max(args.num_layers, 0) :]:
l.unfreeze()
elif args.fine_tune_type in ["lora", "dora"]:
# Convert linear layers to lora/dora layers and unfreeze in the process

7
llms/mlx_lm/tuner/utils.py
View File

@ -52,11 +52,6 @@ def linear_to_lora_layers(
use_dora (bool): If True, uses DoRA instead of LoRA.
Default: ``False``
"""
if num_layers > len(model.layers):
raise ValueError(
f"Requested {num_layers} LoRA layers "
f"but the model only has {len(model.layers)} layers."
)
def to_lora(layer):
if isinstance(layer, (nn.Linear, nn.QuantizedLinear)):
@ -154,7 +149,7 @@ def linear_to_lora_layers(
else:
raise ValueError(f"Lora does not support {model.model_type}")
for l in model.layers[-min(num_layers, 0) :]:
for l in model.layers[-max(num_layers, 0) :]:
lora_layers = [(k, to_lora(m)) for k, m in l.named_modules() if k in keys]
if lora_layers:
l.update_modules(tree_unflatten(lora_layers))