[BugFix][MyPy]: Module has no attribute "sched_getaffinity" [attr-defined]

[hickeyma]

Error when MyPy run locally:

$ pre-commit run -a --hook-stage manual mypy-3.10

Run mypy for Python 3.10.................................................Failed
- hook id: mypy-3.10
- exit code: 1

$ mypy --python-version 3.10 
vllm/utils/cpu_resource_utils.py:128: error: Module has no attribute "sched_getaffinity"  [attr-defined]
Found 1 error in 1 file (checked 1025 source files)

The solution uses sys.platform instead of platform.system() because MyPy only understands sys.platform for OS checks and not platform.system() as it can’t safely narrow types with platform. Updated the file in 61617d0 to use sys.platform for consistency.

[claude]

Claude Code Review

This pull request is from a fork — automated review is disabled. A repository maintainer can comment @claude review to run a one-time review.

[gemini-code-assist]

Code Review

This pull request updates the get_allowed_cpu_list function in vllm/utils/cpu_resource_utils.py to explicitly check for the Linux platform before attempting to use os.sched_getaffinity. This change replaces a Darwin-specific check with a more robust Linux-specific check, ensuring compatibility across different operating systems where os.sched_getaffinity might not be available. I have no feedback to provide.

[hmellor]

Nice!