Skip to content

Fix loading models with mismatched sizes #36463

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
ArthurZucker merged 2 commits into from
Feb 28, 2025
Merged

Fix loading models with mismatched sizes #36463

Changes from 1 commit
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
739872b
Fix loading model with mismatched sizes
qubvel Feb 27, 2025
6155c85
trigger tests
qubvel Feb 28, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 3 additions & 1 deletion src/transformers/modeling_utils.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4907,7 +4907,9 @@ def _load_pretrained_model(
model_to_load, state_dict, start_prefix
)
# at this point the state dict should be on cpu, we don't need to actually read it
fixed_state_dict = model_to_load._fix_state_dict_keys_on_load(state_dict)
mismatched_names = [name for name, _, _ in mismatched_keys]
fixed_state_dict = {k: v for k, v in state_dict.items() if k not in mismatched_names}
fixed_state_dict = model_to_load._fix_state_dict_keys_on_load(fixed_state_dict)
model_to_load.load_state_dict(fixed_state_dict, strict=False, assign=assign_to_params_buffers)
Comment on lines +4910 to 4913
Copy link
Contributor Author

@qubvel qubvel Feb 27, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

strict=False does not allow loading weights with mismatched sizes, filter those keys first

else:
# This should always be a list but, just to be sure.
Expand Down