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30 lines
1.2 KiB
30 lines
1.2 KiB
config PAGE_EXTENSION |
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bool "Extend memmap on extra space for more information on page" |
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---help--- |
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Extend memmap on extra space for more information on page. This |
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could be used for debugging features that need to insert extra |
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field for every page. This extension enables us to save memory |
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by not allocating this extra memory according to boottime |
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configuration. |
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config DEBUG_PAGEALLOC |
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bool "Debug page memory allocations" |
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depends on DEBUG_KERNEL |
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depends on !HIBERNATION || ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC |
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depends on !KMEMCHECK |
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select PAGE_EXTENSION |
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select PAGE_POISONING if !ARCH_SUPPORTS_DEBUG_PAGEALLOC |
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---help--- |
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Unmap pages from the kernel linear mapping after free_pages(). |
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This results in a large slowdown, but helps to find certain types |
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of memory corruption. |
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For architectures which don't enable ARCH_SUPPORTS_DEBUG_PAGEALLOC, |
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fill the pages with poison patterns after free_pages() and verify |
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the patterns before alloc_pages(). Additionally, |
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this option cannot be enabled in combination with hibernation as |
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that would result in incorrect warnings of memory corruption after |
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a resume because free pages are not saved to the suspend image. |
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config PAGE_POISONING |
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bool
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