linux/mm/Kconfig.debug
<<
>>
Prefs
   1config DEBUG_PAGEALLOC
   2        bool "Debug page memory allocations"
   3        depends on DEBUG_KERNEL
   4        depends on !HIBERNATION || ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC
   5        depends on !KMEMCHECK
   6        select PAGE_POISONING if !ARCH_SUPPORTS_DEBUG_PAGEALLOC
   7        select PAGE_GUARD if ARCH_SUPPORTS_DEBUG_PAGEALLOC
   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
  11          of memory corruption.
  12
  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
  20config WANT_PAGE_DEBUG_FLAGS
  21        bool
  22
  23config PAGE_POISONING
  24        bool
  25        select WANT_PAGE_DEBUG_FLAGS
  26
  27config PAGE_GUARD
  28        bool
  29        select WANT_PAGE_DEBUG_FLAGS
  30
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.