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CONFIG_ZSMALLOC_PGTABLE_MAPPING: Use page table mapping to access object in zsmalloc

General informations

The Linux kernel configuration item CONFIG_ZSMALLOC_PGTABLE_MAPPING:

Help text

By default, zsmalloc uses a copy-based object mapping method to access allocations that span two pages. However, if a particular architecture (ex, ARM) performs VM mapping faster than copying, then you should select this. This causes zsmalloc to use page table mapping rather than copying for object mapping.

You can check speed with zsmalloc benchmark:



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