X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=mm%2FKconfig.debug;h=af7cfb43d2f0526019b86fa35a75202aae222d1c;hb=4b42af81f0d7f95dff320f47d99c201925f406f5;hp=c8d62d49a44e1bd8ec15e42d321da762b58c3b45;hpb=6a11f75b6a17b5d9ac5025f8d048382fd1f47377;p=safe%2Fjmp%2Flinux-2.6

diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug
index c8d62d4..af7cfb4 100644
--- a/mm/Kconfig.debug
+++ b/mm/Kconfig.debug
@@ -1,3 +1,13 @@
+config DEBUG_PAGEALLOC
+	bool "Debug page memory allocations"
+	depends on DEBUG_KERNEL && ARCH_SUPPORTS_DEBUG_PAGEALLOC
+	depends on !HIBERNATION || !PPC && !SPARC
+	depends on !KMEMCHECK
+	---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 corruption.
+
 config WANT_PAGE_DEBUG_FLAGS
 	bool
 
@@ -7,11 +17,11 @@ config PAGE_POISONING
 	depends on !HIBERNATION
 	select DEBUG_PAGEALLOC
 	select WANT_PAGE_DEBUG_FLAGS
-	help
+	---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.
+	   but helps to find certain types of memory corruption.
 
-	   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.
+	   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.