CONFIG_GCC_PLUGIN_RANDSTRUCT_PERFORMANCE: Use cacheline-aware structure randomization

General informations

The Linux kernel configuration item CONFIG_GCC_PLUGIN_RANDSTRUCT_PERFORMANCE has multiple definitions:

Use cacheline-aware structure randomization found in scripts/gcc-plugins/Kconfig

The configuration item CONFIG_GCC_PLUGIN_RANDSTRUCT_PERFORMANCE:

• prompt: Use cacheline-aware structure randomization
• type: bool
• depends on: ( CONFIG_GCC_PLUGIN_RANDSTRUCT ) && (! CONFIG_COMPILE_TEST )
• defined in scripts/gcc-plugins/Kconfig
• found in Linux kernels: 4.19–4.20, 5.0–5.18, 5.18+HEAD

Help text

If you say Y here, the RANDSTRUCT randomization will make a best effort at restricting randomization to cacheline-sized groups of elements. It will further not randomize bitfields in structures. This reduces the performance hit of RANDSTRUCT at the cost of weakened randomization.

Use cacheline-aware structure randomization found in arch/Kconfig

The configuration item CONFIG_GCC_PLUGIN_RANDSTRUCT_PERFORMANCE:

• prompt: Use cacheline-aware structure randomization
• type: bool
• depends on: ( CONFIG_GCC_PLUGIN_RANDSTRUCT ) && (! CONFIG_COMPILE_TEST )
• defined in arch/Kconfig
• found in Linux kernels: 4.13–4.18

Help text

If you say Y here, the RANDSTRUCT randomization will make a best effort at restricting randomization to cacheline-sized groups of elements. It will further not randomize bitfields in structures. This reduces the performance hit of RANDSTRUCT at the cost of weakened randomization.

Hardware

LKDDb

Raw data from LKDDb:

• (none)

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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