fix(hicache-kernel): Remove redundant arguments (io_backend and page_size) in memory_pool.py

[hzh0425]

Motivation

BugFix: #8559

Modifications

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Benchmark & Profiling

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[gemini-code-assist]

Summary of Changes

Hello @hzh0425, 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 focuses on code cleanup and maintainability within the hicache-kernel component, specifically in memory_pool.py. It removes redundant io_backend and page_size arguments from several internal function calls, streamlining the codebase and aligning it with current requirements.

Highlights

• Code Refinement: Redundant io_backend and page_size arguments have been removed from calls to internal utility functions within memory_pool.py.
• Bug Fix / Maintenance: This change addresses a bug related to unnecessary parameter passing, improving code clarity and reducing potential for future issues, as indicated by the linked issue #8559.

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[gemini-code-assist]

Code Review

This pull request removes redundant arguments (io_backend and page_size) from several function calls in memory_pool.py. To complete the refactoring, the io_backend parameter should also be removed from the function signatures of load_from_host_per_layer and backup_to_host_all_layer in the KVCache abstract base class and all inheriting classes.

[xiezhq-hermann]

The interface change has already been proposed in this PR and pending main branch to update sgl-kernel, sorry for the confusion.
#8318