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CONFIG_PAGE_POISONING: Debug page memory allocations

General informations

The Linux kernel configuration item CONFIG_PAGE_POISONING has multiple definitions:

found in mm/Kconfig.debug

The configuration item CONFIG_PAGE_POISONING:

Help text

(none)

Debug page memory allocations found in mm/Kconfig.debug

The configuration item CONFIG_PAGE_POISONING:

Help text

Fill the pages with poison patterns after free_pages() and verify the patterns before alloc_pages(). This results in a large slowdown, but helps to find certain types of memory corruption.

This option cannot be enabled in combination with hibernation as that would result in incorrect warnings of memory corruption after a resume because free pages are not saved to the suspend image.

Hardware

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