support layer replication for peft and fix rslora integration (#1445)

src/axolotl/utils/config/models/input/v0_4_1/__init__.py

@@ -6,7 +6,7 @@ Module for pydantic models for configuration
 import logging
 import os
 from enum import Enum
-from typing import Any, Dict, List, Literal, Optional, Union
+from typing import Any, Dict, List, Literal, Optional, Tuple, Union
 
 from pydantic import BaseModel, Field, conlist, field_validator, model_validator
 from transformers import SchedulerType
@@ -179,7 +179,8 @@ class LoraConfig(BaseModel):
     peft_layers_to_transform: Optional[List[int]] = None
     peft: Optional[PeftConfig] = None
     peft_use_dora: Optional[bool] = None
-    peft_use_relora: Optional[bool] = None
+    peft_use_rslora: Optional[bool] = None
+    peft_layer_replication: Optional[List[Tuple[int, int]]] = None
 
     lora_on_cpu: Optional[bool] = None
     gptq: Optional[bool] = None

src/axolotl/utils/models.py

@@ -849,7 +849,9 @@ def load_lora(model, cfg, inference=False, config_only=False):
     if cfg.peft_use_dora:
         lora_config_kwargs["use_dora"] = cfg.peft_use_dora
     if cfg.peft_use_rslora:
-        lora_config_kwargs["use_rslora"] = cfg.use_rslora
+        lora_config_kwargs["use_rslora"] = cfg.peft_use_rslora
+    if cfg.peft_layer_replication:
+        lora_config_kwargs["peft_layer_replication"] = cfg.peft_layer_replication
 
     lora_config = LoraConfig(
         r=cfg.lora_r,