pytorch

5aa183d2 - Add mechanism to disable the "saved tensors hooks" feature (#85553)

Add mechanism to disable the "saved tensors hooks" feature (#85553) The rationale for this is that functorch doesn't work with saved variable hooks at the moment or checkpointing and we need some way to disable it. Concretely: - there's a context manager that does the disabling - this feature is disabled on a thread-local basis - one can set an error message or use the default error message that says the feature has been disabled Since it is thread local I needed to update ATen/ThreadLocalState. To make things nicer, this PR refactors all the "saved tensors hooks" related TLS things into a single struct. Test Plan: - new test Pull Request resolved: https://github.com/pytorch/pytorch/pull/85553 Approved by: https://github.com/soulitzer