feat: exclude mamba blocks for jamba (#1578)

src/axolotl/utils/models.py

@@ -1,4 +1,5 @@
 """Module for models and model loading"""
+
 # pylint: disable=too-many-lines
 
 import logging
@@ -504,6 +505,9 @@ def load_model(
         bnb_config = {
             "load_in_8bit": True,
         }
+        # Exclude mamba blocks from int8 quantization for jamba
+        if cfg.model_config_type == "jamba":
+            bnb_config["llm_int8_skip_modules"] = ["mamba"]
         model_kwargs["quantization_config"] = BitsAndBytesConfig(
             **bnb_config,
         )