Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[sfrench/cifs-2.6.git] / mm / Kconfig.debug

diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug
index 9a7b8b049d04fb42ca02783eabf5e70ef9fe5495..e3df921208c0d81edd6d9a981ffc010bc4eea072 100644 (file)
--- a/mm/Kconfig.debug
+++ b/mm/Kconfig.debug
@@ -39,6 +39,23 @@ config DEBUG_PAGEALLOC_ENABLE_DEFAULT
          Enable debug page memory allocations by default? This value
          can be overridden by debug_pagealloc=off|on.
 
+config PAGE_OWNER
+       bool "Track page owner"
+       depends on DEBUG_KERNEL && STACKTRACE_SUPPORT
+       select DEBUG_FS
+       select STACKTRACE
+       select STACKDEPOT
+       select PAGE_EXTENSION
+       help
+         This keeps track of what call chain is the owner of a page, may
+         help to find bare alloc_page(s) leaks. Even if you include this
+         feature on your build, it is disabled in default. You should pass
+         "page_owner=on" to boot parameter in order to enable it. Eats
+         a fair amount of memory if enabled. See tools/vm/page_owner_sort.c
+         for user-space helper.
+
+         If unsure, say N.
+
 config PAGE_POISONING
        bool "Poison pages after freeing"
        select PAGE_POISONING_NO_SANITY if HIBERNATION