[Deepin-Kernel-SIG] [linux 6.18.y] [deepin] deepin: arm64: decrease NR_CPUS to 1024

[opsiff]

deepin inclusion
category: performance

CONFIG_NR_CPUS=4096 clearly over our all desktop/server/hpc users requirement, limit it to a possible value to more match cacheline and save memory.

Summary by Sourcery

Build:

• Lower the CONFIG_NR_CPUS limit in the Deepin arm64 desktop defconfig from 4096 to 1024 to optimize resource usage.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR adjusts the Deepin ARM64 desktop kernel configuration to reduce the maximum supported CPU count from 4096 to 1024, improving memory usage and cacheline behavior for realistic Deepin desktop/server/HPC workloads.

File-Level Changes

Change	Details	Files
Reduce CONFIG_NR_CPUS from 4096 to 1024 in the Deepin ARM64 desktop defconfig to better match real-world CPU counts and reduce overhead.	Update the CONFIG_NR_CPUS value in the Deepin-specific ARM64 desktop defconfig from 4096 to 1024 Ensure the configuration remains valid for all targeted Deepin desktop/server/HPC platforms while lowering memory and cacheline overhead associated with excessively high NR_CPUS	arch/arm64/configs/deepin_arm64_desktop_defconfig

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[Avenger-285714]

有没有前后对比数据

[Copilot]

Pull request overview

This PR adjusts the Deepin arm64 desktop kernel default configuration to reduce compile-time CPU scalability limits, lowering static memory overhead associated with large NR_CPUS builds.

Changes:

• Reduce CONFIG_NR_CPUS from 4096 to 1024 in the Deepin arm64 desktop defconfig.

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