CONFIG_FRONTSWAP:

General informations

The Linux kernel configuration item CONFIG_FRONTSWAP has multiple definitions:

found in mm/Kconfig

The configuration item CONFIG_FRONTSWAP:

• prompt:
• type: bool
• depends on: (none)
• defined in mm/Kconfig
• found in Linux kernels: 5.17–5.19, 6.0–6.5

Help text

(none)

Enable frontswap to cache swap pages if tmem is present found in mm/Kconfig

The configuration item CONFIG_FRONTSWAP:

• prompt: Enable frontswap to cache swap pages if tmem is present
• type: bool
• depends on: CONFIG_SWAP
• defined in mm/Kconfig
• found in Linux kernels: 3.5–3.19, 4.0–4.20, 5.0–5.16, 5.16+HEAD

Help text

Frontswap is so named because it can be thought of as the opposite of a "backing" store for a swap device. The data is stored into "transcendent memory", memory that is not directly accessible or addressable by the kernel and is of unknown and possibly time-varying size. When space in transcendent memory is available, a significant swap I/O reduction may be achieved. When none is available, all frontswap calls are reduced to a single pointer- compare-against-NULL resulting in a negligible performance hit and swap data is stored as normal on the matching swap device.

If unsure, say Y to enable frontswap.

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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