ValueError: Custom filter_fn and FqnToConfig were both specified. Only filter_fn=None is supported when FqnToConfig is specified.

这个报错通常出现在用 TorchAoConfig 包裹 FqnToConfig 并对 Diffusers 模型(例如 Flux2Transformer2DModel)做量化加载时。根本原因是 Diffusers 在调用 torchao 的 quantize_ 时同时传入了自定义 filter_fn








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