| 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. |