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CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON: HugeTLB Vmemmap Optimization (HVO) defaults to on

General informations

The Linux kernel configuration item CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON has multiple definitions:

HugeTLB Vmemmap Optimization (HVO) defaults to on found in fs/Kconfig

The configuration item CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON:

Help text

The HugeTLB VmemmapvOptimization (HVO) defaults to off. Say Y here to enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off (boot command line) or hugetlb_optimize_vmemmap (sysctl).

Default optimizing vmemmap pages of HugeTLB to on found in fs/Kconfig

The configuration item CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON:

Help text

When using HUGETLB_PAGE_OPTIMIZE_VMEMMAP, the optimizing unused vmemmap pages associated with each HugeTLB page is default off. Say Y here to enable optimizing vmemmap pages of HugeTLB by default. It can then be disabled on the command line via hugetlb_free_vmemmap=off.

Hardware

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