Kconfig.debug revision 22f8b458223151272f6a1e57847b90979958cc7b 
1config DEBUG_PAGEALLOC
2	bool "Debug page memory allocations"
3	depends on DEBUG_KERNEL && ARCH_SUPPORTS_DEBUG_PAGEALLOC
4	depends on !HIBERNATION || !PPC && !SPARC
5	depends on !KMEMCHECK
6	---help---
7	  Unmap pages from the kernel linear mapping after free_pages().
8	  This results in a large slowdown, but helps to find certain types
9	  of memory corruption.
10
11config WANT_PAGE_DEBUG_FLAGS
12	bool
13
14config PAGE_POISONING
15	bool "Debug page memory allocations"
16	depends on DEBUG_KERNEL && !ARCH_SUPPORTS_DEBUG_PAGEALLOC
17	depends on !HIBERNATION
18	select DEBUG_PAGEALLOC
19	select WANT_PAGE_DEBUG_FLAGS
20	---help---
21	   Fill the pages with poison patterns after free_pages() and verify
22	   the patterns before alloc_pages(). This results in a large slowdown,
23	   but helps to find certain types of memory corruption.
24
25	   This option cannot be enabled in combination with hibernation as
26	   that would result in incorrect warnings of memory corruption after
27	   a resume because free pages are not saved to the suspend image.
28