CONFIG_SLUB_CPU_PARTIAL: Enable per cpu partial caches

General informations

The Linux kernel configuration item CONFIG_SLUB_CPU_PARTIAL has multiple definitions:

Enable per cpu partial caches found in mm/Kconfig

The configuration item CONFIG_SLUB_CPU_PARTIAL:

• prompt: Enable per cpu partial caches
• type: bool
• depends on: CONFIG_SMP && ! CONFIG_SLUB_TINY
• defined in mm/Kconfig
• found in Linux kernels: 6.8–6.12

Help text

Per cpu partial caches accelerate objects allocation and freeing that is local to a processor at the price of more indeterminism in the latency of the free. On overflow these caches will be cleared which requires the taking of locks that may cause latency spikes. Typically one would choose no for a realtime system.

SLUB per cpu partial cache found in mm/Kconfig

The configuration item CONFIG_SLUB_CPU_PARTIAL:

• prompt: SLUB per cpu partial cache
• type: bool
• depends on: CONFIG_SLUB && CONFIG_SMP && ! CONFIG_SLUB_TINY
• defined in mm/Kconfig
• found in Linux kernels: 5.19, 6.0–6.7

Help text

Per cpu partial caches accelerate objects allocation and freeing that is local to a processor at the price of more indeterminism in the latency of the free. On overflow these caches will be cleared which requires the taking of locks that may cause latency spikes. Typically one would choose no for a realtime system.

SLUB per cpu partial cache found in init/Kconfig

The configuration item CONFIG_SLUB_CPU_PARTIAL:

• prompt: SLUB per cpu partial cache
• type: bool
• depends on: CONFIG_SLUB && CONFIG_SMP
• defined in init/Kconfig
• found in Linux kernels: 3.11–3.19, 4.0–4.20, 5.0–5.18, 5.18+HEAD

Help text

Per cpu partial caches accelerate objects allocation and freeing that is local to a processor at the price of more indeterminism in the latency of the free. On overflow these caches will be cleared which requires the taking of locks that may cause latency spikes. Typically one would choose no for a realtime system.

Hardware

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The data is retrived from:

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• Linux Kernel Driver DataBase (LKDDb)

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