Remove model move to support low mem usage in SPMD-FSDP #13
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In the current implementation of SPMD-FSDP, the model movement is managed by the following code segment regardless of whether low memory usage mode is activated.
https://github.com/AlibabaPAI/xla/blob/63e20fb8e02243a27fc2486670a85d7b4ab03c1b/torch_xla/experimental/spmd_fully_sharded_data_parallel.py#L100
However, model movement may cause the
materialize_moduleto fail under low memory usage.