CONFIG_KFENCE_STATIC_KEYS: Use static keys to set up allocations

General informations

The Linux kernel configuration item CONFIG_KFENCE_STATIC_KEYS:

• prompt: Use static keys to set up allocations
• type: bool
• depends on: ( CONFIG_EXPERT ) && ( CONFIG_JUMP_LABEL )
• defined in lib/Kconfig.kfence
• found in Linux kernels: 5.12–5.19, 6.0–6.12, 6.13-rc+HEAD

Help text

Use static keys (static branches) to set up KFENCE allocations. This option is only recommended when using very large sample intervals, or performance has carefully been evaluated with this option.

Using static keys comes with trade-offs that need to be carefully evaluated given target workloads and system architectures. Notably, enabling and disabling static keys invoke IPI broadcasts, the latency and impact of which is much harder to predict than a dynamic branch.

Say N if you are unsure.

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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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