[bugfix] Fix multinode write conflict mcore-bridge (deepseek-v3)

[Jintao-Huang]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @Jintao-Huang, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a critical bug involving multinode write conflicts within the mcore-bridge component, specifically impacting deepseek-v3 models. The fix involves removing a specific utility designed to disable distributed data parallel (DDP) barriers, which was inadvertently causing synchronization issues and write conflicts during the initialization of Hugging Face models in a distributed environment.

Highlights

• Dependency Removal: The import of disable_safe_ddp_context_use_barrier from swift.utils has been removed, indicating that this utility is no longer needed or is causing issues in the current context.
• Context Manager Update: The disable_safe_ddp_context_use_barrier() call has been removed from the _init_meta_hf_model method's context manager, suggesting that the previous attempt to disable DDP barriers during meta-model initialization was contributing to the multinode write conflict.

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[gemini-code-assist]

Code Review

This pull request addresses a multi-node write conflict by removing the usage of disable_safe_ddp_context_use_barrier. This change appears correct and improves robustness. By removing the context manager, default synchronization mechanisms are restored, which is crucial for preventing race conditions during file system operations in a distributed setting, especially when initializing a model on a meta device which may still involve reading configuration files. The code is now cleaner and safer for multi-node execution. The changes are approved.