Resize embeds with DeepSpeed (#32214)

* fix resize when deepspeed

* deepsped uses new embeds

* we needed this

src/transformers/modeling_utils.py

@@ -1980,12 +1980,22 @@ class PreTrainedModel(nn.Module, ModuleUtilsMixin, GenerationMixin, PushToHubMix
         if new_num_tokens is None and pad_to_multiple_of is None:
             return model_embeds
 
+        # Since we are basically resuing the same old embeddings with new weight values, gathering is required
+        is_quantized = hasattr(self, "hf_quantizer") and self.hf_quantizer is not None
+        if is_deepspeed_zero3_enabled() and not is_quantized:
+            import deepspeed
+
+            with deepspeed.zero.GatheredParameters(model_embeds.weight, modifier_rank=None):
+                vocab_size = model_embeds.weight.shape[0]
+        else:
+            vocab_size = model_embeds.weight.shape[0]
+
         # Update base model and current model config
         if hasattr(self.config, "text_config"):
-            self.config.text_config.vocab_size = model_embeds.weight.shape[0]
+            self.config.text_config.vocab_size = vocab_size
         else:
-            self.config.vocab_size = model_embeds.weight.shape[0]
-        self.vocab_size = model_embeds.weight.shape[0]
+            self.config.vocab_size = vocab_size
+        self.vocab_size = vocab_size
 
         # Tie weights again if needed
         self.tie_weights()
@@ -2139,7 +2149,7 @@ class PreTrainedModel(nn.Module, ModuleUtilsMixin, GenerationMixin, PushToHubMix
 
             params = [old_embeddings.weight, new_embeddings.weight]
             with deepspeed.zero.GatheredParameters(params, modifier_rank=0):
-                old_embeddings.weight.data = new_embeddings.weight.data
+                old_embeddings.weight = new_embeddings.weight
                 old_embeddings.num_embeddings = new_embeddings.weight.data.shape[0]
 
                 # If the new number of tokens is smaller than the original `padding_idx`, the `padding_idx`