CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B: Force all function address 64B aligned

General informations

The Linux kernel configuration item CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B:

• prompt: Force all function address 64B aligned
• type: bool
• depends on: CONFIG_EXPERT && ( CONFIG_X86_64 || CONFIG_ARM64 || CONFIG_PPC32 || CONFIG_PPC64 || CONFIG_ARC || CONFIG_RISCV || CONFIG_S390 )
• defined in lib/Kconfig.debug
• found in Linux kernels: 5.14–5.19, 6.0–6.12, 6.13-rc+HEAD

Help text

There are cases that a commit from one domain changes the function address alignment of other domains, and cause magic performance bump (regression or improvement). Enable this option will help to verify if the bump is caused by function alignment changes, while it will slightly increase the kernel size and affect icache usage.

It is mainly for debug and performance tuning use.

Hardware

LKDDb

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Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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