CONFIG_HIGHPTE: Allocate 3rd-level pagetables from highmem

General informations

The Linux kernel configuration item CONFIG_HIGHPTE has multiple definitions:

Allocate 3rd-level pagetables from highmem found in arch/x86/Kconfig

The configuration item CONFIG_HIGHPTE:

• prompt: Allocate 3rd-level pagetables from highmem
• type: bool
• depends on: CONFIG_HIGHMEM
• defined in arch/x86/Kconfig
• found in Linux kernels: 2.6.24–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

The VM uses one page table entry for each page of physical memory. For systems with a lot of RAM, this can be wasteful of precious low memory. Setting this option will put user-space page table entries in high memory.

Allocate 2nd-level pagetables from highmem found in arch/arm/Kconfig

The configuration item CONFIG_HIGHPTE:

• prompt: Allocate 2nd-level pagetables from highmem
• type: bool
• depends on: ( CONFIG_EXPERT ) && ( CONFIG_HIGHMEM )
• defined in arch/arm/Kconfig
• found in Linux kernels: 2.6.32–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

The VM uses one page of physical memory for each page table. For systems with a lot of processes, this can use a lot of precious low memory, eventually leading to low memory being consumed by page tables. Setting this option will allow user-space 2nd level page tables to reside in high memory.

Allocate page tables in highmem found in arch/frv/Kconfig

The configuration item CONFIG_HIGHPTE:

• prompt: Allocate page tables in highmem
• type: bool
• depends on: CONFIG_HIGHMEM
• defined in arch/frv/Kconfig
• found in Linux kernels: 2.6.11–2.6.39, 3.0–3.19, 4.0–4.16

Help text

The VM uses one page of memory for each page table. For systems with a lot of RAM, this can be wasteful of precious low memory. Setting this option will put user-space page tables in high memory.

Allocate 3rd-level pagetables from highmem found in arch/i386/Kconfig

The configuration item CONFIG_HIGHPTE:

• prompt: Allocate 3rd-level pagetables from highmem
• type: bool
• depends on: CONFIG_HIGHMEM4G || CONFIG_HIGHMEM64G
• defined in arch/i386/Kconfig
• found in Linux kernels: 2.5.45–2.5.75, 2.6.0–2.6.23

Help text

The VM uses one page table entry for each page of physical memory. For systems with a lot of RAM, this can be wasteful of precious low memory. Setting this option will put user-space page table entries in high memory.

Hardware

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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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