CONFIG_ZBUD: 2:1 compression allocator (zbud)

General informations

The Linux kernel configuration item CONFIG_ZBUD has multiple definitions:

2:1 compression allocator (zbud) found in mm/Kconfig

The configuration item CONFIG_ZBUD:

• prompt: 2:1 compression allocator (zbud)
• type: tristate
• depends on: CONFIG_ZSWAP
• defined in mm/Kconfig
• found in Linux kernels: 5.19, 6.0–6.8, 6.9-rc+HEAD
• modules built: zbud

Help text

A special purpose allocator for storing compressed pages. It is designed to store up to two compressed pages per physical page. While this design limits storage density, it has simple and deterministic reclaim properties that make it preferable to a higher density approach when reclaim will be used.

Low (Up to 2x) density storage for compressed pages found in mm/Kconfig

The configuration item CONFIG_ZBUD:

• prompt: Low (Up to 2x) density storage for compressed pages
• type: tristate
• depends on: CONFIG_ZPOOL
• defined in mm/Kconfig
• found in Linux kernels: 4.7–4.20, 5.0–5.18, 5.18+HEAD
• modules built: zbud

Help text

A special purpose allocator for storing compressed pages. It is designed to store up to two compressed pages per physical page. While this design limits storage density, it has simple and deterministic reclaim properties that make it preferable to a higher density approach when reclaim will be used.

Low density storage for compressed pages found in mm/Kconfig

The configuration item CONFIG_ZBUD:

• prompt: Low density storage for compressed pages
• type: tristate
• depends on: (none)
• defined in mm/Kconfig
• found in Linux kernels: 3.17–3.19, 4.0–4.6
• modules built: zbud

Help text

A special purpose allocator for storing compressed pages. It is designed to store up to two compressed pages per physical page. While this design limits storage density, it has simple and deterministic reclaim properties that make it preferable to a higher density approach when reclaim will be used.

found in mm/Kconfig

The configuration item CONFIG_ZBUD:

• prompt:
• type: tristate
• depends on: (none)
• defined in mm/Kconfig
• found in Linux kernels: 3.11–3.16
• modules built: zbud

Help text

A special purpose allocator for storing compressed pages. It is designed to store up to two compressed pages per physical page. While this design limits storage density, it has simple and deterministic reclaim properties that make it preferable to a higher density approach when reclaim will be used.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb module zbud CONFIG_ZBUD : mm/Kconfig : "2:1 compression allocator (zbud)" # in 3.11–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

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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