CONFIG_NO_PAGE_MAPCOUNT: No per-page mapcount (EXPERIMENTAL)

General informations

The Linux kernel configuration item CONFIG_NO_PAGE_MAPCOUNT:

• prompt: No per-page mapcount (EXPERIMENTAL)
• type: bool
• depends on: (none)
• defined in mm/Kconfig
• found in Linux kernels: 6.15-rc+HEAD

Help text

Do not maintain per-page mapcounts for pages part of larger allocations, such as transparent huge pages.

When this config option is enabled, some interfaces that relied on this information will rely on less-precise per-allocation information instead: for example, using the average per-page mapcount in such a large allocation instead of the per-page mapcount.

EXPERIMENTAL because the impact of some changes is still unclear.

Hardware

LKDDb

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• (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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