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

 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	---help---
 8	  Unmap pages from the kernel linear mapping after free_pages().
 9	  This results in a large slowdown, but helps to find certain types
10	  of memory corruption.
11
12	  For architectures which don't enable ARCH_SUPPORTS_DEBUG_PAGEALLOC,
13	  fill the pages with poison patterns after free_pages() and verify
14	  the patterns before alloc_pages().  Additionally,
15	  this option cannot be enabled in combination with hibernation as
16	  that would result in incorrect warnings of memory corruption after
17	  a resume because free pages are not saved to the suspend image.
18
19config WANT_PAGE_DEBUG_FLAGS
20	bool
21
22config PAGE_POISONING
 
 
 
 
23	bool
24	select WANT_PAGE_DEBUG_FLAGS