fix: Fix context-parallel gather crash on PyTorch < 2.6 - #14515
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Ricardo-M-L wants to merge 1 commit into
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fix: Fix context-parallel gather crash on PyTorch < 2.6#14515Ricardo-M-L wants to merge 1 commit into
Ricardo-M-L wants to merge 1 commit into
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`torch.accelerator` was added in PyTorch 2.6, but diffusers still supports 2.1+. `gather_size_by_comm` unconditionally calls `torch.accelerator.current_accelerator()` whenever the backend is not CPU, so any user running distributed context parallelism on an older torch hits `AttributeError: module 'torch' has no attribute 'accelerator'` before a single collective runs. Guard the call with `hasattr(torch, "accelerator")` and fall back to `torch.cuda.current_device()` on older versions — the same pattern already used in `loaders/lora_pipeline.py`, `quantizers/gguf/gguf_quantizer.py`, and `hooks/group_offloading.py`. Fixes huggingface#13074
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Hi @Ricardo-M-L, thanks for the PR! It does not appear to link an issue it fixes. If this PR addresses an existing issue, please add a closing keyword (e.g. |
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Clean rebase