[Deepin-Kernel-SIG] [linux 6.6-y] [Deepin] config: deepin_arm64_desktop_defconfig: enable multiple decompress fo…

[opsiff]

…r squashfs

deepin inclusion
category: bugfix

Reenable this config, it help to boost the livecd startup.

Link: #44

Summary by Sourcery

Reenable squashfs multiple decompression support in the deepin ARM64 desktop kernel configuration to improve live CD startup performance.

Bug Fixes:

• Restore the kernel config option for multiple squashfs decompression methods in the deepin ARM64 desktop defconfig to fix degraded live CD startup behavior.

Build:

• Adjust the deepin ARM64 desktop defconfig to include squashfs multiple decompression support in kernel builds.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Update the deepin ARM64 desktop kernel defconfig to re‑enable SquashFS multi‑decompress support, improving live CD startup performance.

File-Level Changes

Change	Details	Files
Re-enable SquashFS multi-decompress support in the deepin ARM64 desktop ARM64 defconfig.	Set the SquashFS multi-decompress Kconfig option(s) to y or enabled in the defconfig. Ensure the option is included in the built-in configuration for the deepin ARM64 desktop kernel so live CD images benefit at boot.	arch/arm64/configs/deepin_arm64_desktop_defconfig

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[deepin-ci-robot]

deepin pr auto review

我来帮你分析这个内核配置文件的修改：

1. 语法逻辑分析：

• 修改添加了 CONFIG_SQUASHFS_COMPILE_DECOMP_MULTI_PERCPU=y 配置项
• 语法符合 Linux 内核配置文件的规范，使用了正确的 CONFIG_ 前缀和 =y 赋值格式
• 位置放置合理，在 SQUASHFS 相关配置组内

2. 代码质量：

• 配置项的命名清晰，COMPILE_DECOMP_MULTI_PERCPU 明确表达了其功能：编译时支持多 CPU 解压
• 放置位置合适，与其他 SQUASHFS 相关配置项保持在一起，便于维护

3. 性能影响：

• 这个配置启用后，SquashFS 文件系统将使用多 CPU 并行解压
• 在多核系统上可以显著提升文件读取性能，特别是在读取压缩文件时
• 会增加少量内存开销，但在现代多核系统上这个开销是值得的

4. 安全性：

• 这个配置项本身不会引入安全风险
• SquashFS 是一个只读文件系统，本身具有较好的安全性
• 多 CPU 解压不会影响文件系统的安全性

改进建议：

1. 考虑添加注释说明启用此配置的原因
2. 可以评估是否需要同时启用其他相关的多核优化配置项
3. 建议在相关文档中记录这个配置变更及其性能影响

总的来说，这是一个合理的配置修改，可以提升系统在多核环境下的文件系统性能，特别是在处理 SquashFS 压缩文件时。修改本身没有明显的问题，建议采用。

[Avenger-285714]

/approve

[Copilot]

Pull request overview

This PR re-enables the CONFIG_SQUASHFS_COMPILE_DECOMP_MULTI_PERCPU configuration option in the deepin ARM64 desktop kernel configuration to improve live CD startup performance by enabling per-CPU parallel decompression for SquashFS filesystems.

• Adds CONFIG_SQUASHFS_COMPILE_DECOMP_MULTI_PERCPU=y to enable per-CPU parallel decompression

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[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Avenger-285714, Cryolitia

The full list of commands accepted by this bot can be found here.

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Details

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• deepin/OWNERS [Avenger-285714]

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