1config DEBUG_PAGEALLOC 2 bool "Debug page memory allocations" 3 depends on DEBUG_KERNEL && ARCH_SUPPORTS_DEBUG_PAGEALLOC 4 depends on !HIBERNATION || !PPC && !SPARC 5 ---help--- 6 Unmap pages from the kernel linear mapping after free_pages(). 7 This results in a large slowdown, but helps to find certain types 8 of memory corruptions. 9 10config WANT_PAGE_DEBUG_FLAGS 11 bool 12 13config PAGE_POISONING 14 bool "Debug page memory allocations" 15 depends on DEBUG_KERNEL && !ARCH_SUPPORTS_DEBUG_PAGEALLOC 16 depends on !HIBERNATION 17 select DEBUG_PAGEALLOC 18 select WANT_PAGE_DEBUG_FLAGS 19 help 20 Fill the pages with poison patterns after free_pages() and verify 21 the patterns before alloc_pages(). This results in a large slowdown, 22 but helps to find certain types of memory corruptions. 23 24 This option cannot enalbe with hibernation. Otherwise, it will get 25 wrong messages for memory corruption because the free pages are not 26 saved to the suspend image. 27