[Doc] Update mooncake nvlink transport doc for PD disaggregation

[ShangmingCai]

Motivation

Modifications

Accuracy Tests

Benchmarking and Profiling

Checklist

• Format your code according to the Format code with pre-commit.
• Add unit tests according to the Run and add unit tests.
• Update documentation according to Write documentations.
• Provide accuracy and speed benchmark results according to Test the accuracy and Benchmark the speed.

[gemini-code-assist]

Summary of Changes

Hello @ShangmingCai, 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 PR updates the documentation for Mooncake NVLink transport within the PD disaggregation guide. It adds instructions for configuring environment variables (SGLANG_MOONCAKE_CUSTOM_MEM_POOL and MC_FORCE_MNNVL) required for NVL72 deployments.

Highlights

• Intent: This pull request updates the documentation for Mooncake NVLink transport, specifically for PD disaggregation, to include necessary configuration for NVL72 deployments.
• Key Changes: A new section titled 'NVLink Transport Configuration' has been added to docs/advanced_features/pd_disaggregation.md. This section instructs users to set SGLANG_MOONCAKE_CUSTOM_MEM_POOL=True and MC_FORCE_MNNVL=True when utilizing NVLink transport with the Mooncake backend for NVL72 deployments.
• Reviewer Activity: No specific reviewer activity has been noted yet.

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[gemini-code-assist]

Code Review

This pull request updates the documentation for PD disaggregation to include configuration for NVLink transport with the Mooncake backend. The change is clear and well-placed within the document. I have one suggestion to improve the accuracy of the description based on the provided source code.