Hello, I am trying to set up a custom device_map via hugging face's instructions

https://huggingface.co/docs/transformers/main/en/main_classes/quantization#offload-between-cpu-and-gpu

I have this code inserted into my "server.py" folder for text-generation-webui

# Set the quantization config with llm_int8_enable_fp32_cpu_offload set to True
quantization_config = BitsAndBytesConfig(llm_int8_enable_fp32_cpu_offload=True)
device_map = {
"transformer.word_embeddings": 0,
"transformer.word_embeddings_layernorm": 0,
"lm_head": "cpu",
"transformer.h": 0,
"transformer.ln_f": 0,
}
model_path = "decapoda-research/llama-7b-hf"
model_8bit = AutoModelForCausalLM.from_pretrained(
model_path,
device_map=device_map,
quantization_config=quantization_config,
)

However two problem

1. It downloads a new copy of the model from hugging face rather than from my model directory.
2. I get this error even after the download

File "C:\Windows\System32\text-generation-webui\server7b.py", line 33, in <module>
model_8bit = AutoModelForCausalLM.from_pretrained(
File "C:\Users\justi\miniconda3\envs\textgen\lib\site-packages\transformers\models\auto\auto_factory.py", line 471, in from_pretrained
return model_class.from_pretrained(
File "C:\Users\justi\miniconda3\envs\textgen\lib\site-packages\transformers\modeling_utils.py", line 2643, in from_pretrained
) = cls._load_pretrained_model(
File "C:\Users\justi\miniconda3\envs\textgen\lib\site-packages\transformers\modeling_utils.py", line 2966, in _load_pretrained_model
new_error_msgs, offload_index, state_dict_index = _load_state_dict_into_meta_model(
File "C:\Users\justi\miniconda3\envs\textgen\lib\site-packages\transformers\modeling_utils.py", line 662, in _load_state_dict_into_meta_model
raise ValueError(f"{param_name} doesn't have any device set.")
ValueError: model.layers.0.self_attn.q_proj.weight doesn't have any device set.
(textgen) C:\Windows\System32\text-generation-webui>

Does anyone know how to do CPU/GPU offloading for text-generation-webui?