2009-04-02 16:56:30 -07:00
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config DEBUG_PAGEALLOC
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bool "Debug page memory allocations"
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2011-03-22 16:32:46 -07:00
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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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2008-04-04 00:51:41 +02:00
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depends on !KMEMCHECK
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2011-03-22 16:32:46 -07:00
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select PAGE_POISONING if !ARCH_SUPPORTS_DEBUG_PAGEALLOC
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2012-01-10 15:07:28 -08:00
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select PAGE_GUARD if ARCH_SUPPORTS_DEBUG_PAGEALLOC
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2009-04-02 16:56:30 -07:00
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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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2009-07-24 05:31:17 +02:00
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of memory corruption.
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2009-04-02 16:56:30 -07:00
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2011-03-22 16:32:46 -07:00
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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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2009-03-31 15:23:17 -07:00
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config WANT_PAGE_DEBUG_FLAGS
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bool
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config PAGE_POISONING
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2011-03-22 16:32:46 -07:00
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bool
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2009-03-31 15:23:17 -07:00
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select WANT_PAGE_DEBUG_FLAGS
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2012-01-10 15:07:28 -08:00
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config PAGE_GUARD
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bool
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select WANT_PAGE_DEBUG_FLAGS
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