CONFIG_ZSWAP_SHRINKER_DEFAULT_ON: Shrink the zswap pool on memory pressure

General informations

The Linux kernel configuration item CONFIG_ZSWAP_SHRINKER_DEFAULT_ON:

• prompt: Shrink the zswap pool on memory pressure
• type: bool
• depends on: CONFIG_ZSWAP
• defined in mm/Kconfig
• found in Linux kernels: 6.8–6.12, 6.13-rc+HEAD

Help text

If selected, the zswap shrinker will be enabled, and the pages stored in the zswap pool will become available for reclaim (i.e written back to the backing swap device) on memory pressure.

This means that zswap writeback could happen even if the pool is not yet full, or the cgroup zswap limit has not been reached, reducing the chance that cold pages will reside in the zswap pool and consume memory indefinitely.

Hardware

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The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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