projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| ee3b4290 AM |
1 | config DEBUG_PAGEALLOC |
| 2 | bool "Debug page memory allocations" | |
| 7bc32f6f AM |
3 | depends on DEBUG_KERNEL |
| 4 | depends on !HIBERNATION || ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC | |
| 7d46d9e6 | 5 | depends on !KMEMCHECK |
| 7bc32f6f | 6 | select PAGE_POISONING if !ARCH_SUPPORTS_DEBUG_PAGEALLOC |
| c0a32fc5 | 7 | select PAGE_GUARD if ARCH_SUPPORTS_DEBUG_PAGEALLOC |
| ee3b4290 AM |
8 | ---help--- |
| 9 | Unmap pages from the kernel linear mapping after free_pages(). | |
| 10 | This results in a large slowdown, but helps to find certain types | |
| 22f8b458 | 11 | of memory corruption. |
| ee3b4290 | 12 | |
| 7bc32f6f AM |
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. | |
| 19 | ||
| 6a11f75b AM |
20 | config WANT_PAGE_DEBUG_FLAGS |
| 21 | bool | |
| 22 | ||
| 23 | config PAGE_POISONING | |
| 7bc32f6f | 24 | bool |
| 6a11f75b | 25 | select WANT_PAGE_DEBUG_FLAGS |
| c0a32fc5 SG |
26 | |
| 27 | config PAGE_GUARD | |
| 28 | bool | |
| 29 | select WANT_PAGE_DEBUG_FLAGS |