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CONFIG_SPARSEMEM_VMEMMAP: Sparse Memory virtual memmap

General informations

The Linux kernel configuration item CONFIG_SPARSEMEM_VMEMMAP:

• prompt: Sparse Memory virtual memmap
• type: bool
• depends on: CONFIG_SPARSEMEM && CONFIG_SPARSEMEM_VMEMMAP_ENABLE
• defined in mm/Kconfig
• found in Linux kernels: 2.6.24–2.6.39, 3.0–3.9, 3.10-rc+HEAD

Help text

SPARSEMEM_VMEMMAP uses a virtually mapped memmap to optimise pfn_to_page and page_to_pfn operations. This is the most efficient option when sufficient kernel resources are available.

Hardware

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