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CONFIG_DIRECT_GBPAGES: Enable 1GB pages for kernel pagetables

General informations

The Linux kernel configuration item CONFIG_DIRECT_GBPAGES has multiple definitions:

Enable 1GB pages for kernel pagetables found in arch/x86/Kconfig

The configuration item CONFIG_DIRECT_GBPAGES:

Help text

Allow the kernel linear mapping to use 1GB pages on CPUs that support it. This can improve the kernel's performance a tiny bit by reducing TLB pressure. If in doubt, say "Y".

Enable gbpages-mapped kernel pagetables found in arch/x86/Kconfig.debug

The configuration item CONFIG_DIRECT_GBPAGES:

Help text

Enable gigabyte pages support (if the CPU supports it). This can improve the kernel's performance a tiny bit by reducing TLB pressure.

This is experimental code.

If in doubt, say "N".

Hardware

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