2 bool "Debug page memory allocations"
3 depends on DEBUG_KERNEL
4 depends on !HIBERNATION || ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC
6 select PAGE_POISONING if !ARCH_SUPPORTS_DEBUG_PAGEALLOC
7 select PAGE_GUARD if ARCH_SUPPORTS_DEBUG_PAGEALLOC
9 Unmap pages from the kernel linear mapping after free_pages().
10 This results in a large slowdown, but helps to find certain types
13 For architectures which don't enable ARCH_SUPPORTS_DEBUG_PAGEALLOC,
14 fill the pages with poison patterns after free_pages() and verify
15 the patterns before alloc_pages(). Additionally,
16 this option cannot be enabled in combination with hibernation as
17 that would result in incorrect warnings of memory corruption after
18 a resume because free pages are not saved to the suspend image.
20 config WANT_PAGE_DEBUG_FLAGS
25 select WANT_PAGE_DEBUG_FLAGS
29 select WANT_PAGE_DEBUG_FLAGS