| config DEBUG_PAGEALLOC |
| bool "Debug page memory allocations" |
| depends on DEBUG_KERNEL && ARCH_SUPPORTS_DEBUG_PAGEALLOC |
| depends on !HIBERNATION || !PPC && !SPARC |
| depends on !KMEMCHECK |
| ---help--- |
| Unmap pages from the kernel linear mapping after free_pages(). |
| This results in a large slowdown, but helps to find certain types |
| of memory corruption. |
| |
| config WANT_PAGE_DEBUG_FLAGS |
| bool |
| |
| config PAGE_POISONING |
| bool "Debug page memory allocations" |
| depends on DEBUG_KERNEL && !ARCH_SUPPORTS_DEBUG_PAGEALLOC |
| depends on !HIBERNATION |
| select DEBUG_PAGEALLOC |
| select WANT_PAGE_DEBUG_FLAGS |
| ---help--- |
| 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. |
