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[EAGLE] [Quantization] turn quantization off for draft model initialization #26411

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[EAGLE] [Quantization] turn quantization off for draft model initialization #26411

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1a4810d
turn quantinzation off for draft model initialization
jmkuebler Oct 8, 2025
b2ef3a6
fix for the non-quantized case
jmkuebler Oct 8, 2025
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11 changes: 11 additions & 0 deletions vllm/v1/spec_decode/eagle.py
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Original file line number Diff line number Diff line change
Expand Up @@ -892,9 +892,20 @@ def load_model(self, target_model: nn.Module) -> None:
from vllm.compilation.backends import set_model_tag

with set_model_tag("eagle_head"):
if self.vllm_config.quant_config is not None:
target_model_quant_config = self.vllm_config.quant_config
self.vllm_config.quant_config = None
logger.warning(
"Quantization is not supported for draft model, "
"disabling quantization for draft model"
)
else:
target_model_quant_config = None
self.model = get_model(
vllm_config=self.vllm_config, model_config=draft_model_config
)
# restore the quant config
self.vllm_config.quant_config = target_model_quant_config

draft_attn_layer_names = (
get_layers_from_vllm_config(self.vllm_config, Attention).keys()
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