diff options
Diffstat (limited to 'mm/Kconfig.debug')
| -rw-r--r-- | mm/Kconfig.debug | 31 |
1 files changed, 17 insertions, 14 deletions
diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug index bb01e298f26..4b2443254de 100644 --- a/mm/Kconfig.debug +++ b/mm/Kconfig.debug @@ -1,26 +1,29 @@ config DEBUG_PAGEALLOC bool "Debug page memory allocations" - depends on DEBUG_KERNEL && ARCH_SUPPORTS_DEBUG_PAGEALLOC - depends on !HIBERNATION || !PPC && !SPARC + depends on DEBUG_KERNEL + depends on !HIBERNATION || ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC + depends on !KMEMCHECK + select PAGE_POISONING if !ARCH_SUPPORTS_DEBUG_PAGEALLOC + select PAGE_GUARD if ARCH_SUPPORTS_DEBUG_PAGEALLOC ---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 corruptions. + of memory corruption. + + For architectures which don't enable ARCH_SUPPORTS_DEBUG_PAGEALLOC, + fill the pages with poison patterns after free_pages() and verify + the patterns before alloc_pages(). Additionally, + 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. 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 + bool 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 corruptions. - This option cannot enalbe with hibernation. Otherwise, it will get - wrong messages for memory corruption because the free pages are not - saved to the suspend image. +config PAGE_GUARD + bool + select WANT_PAGE_DEBUG_FLAGS |