Merge tag 'nfs-for-3.11-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

[~andy/linux] / mm / Kconfig

diff --git a/mm/Kconfig b/mm/Kconfig
index f5e698e30d4a230f6fe0b45e92892483507f3ade..7e28ecfa8aa42663ba3153a984ee1dbe69f7e96b 100644 (file)
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -477,3 +477,15 @@ config FRONTSWAP
          and swap data is stored as normal on the matching swap device.
 
          If unsure, say Y to enable frontswap.
+
+config MEM_SOFT_DIRTY
+       bool "Track memory changes"
+       depends on CHECKPOINT_RESTORE && HAVE_ARCH_SOFT_DIRTY
+       select PROC_PAGE_MONITOR
+       help
+         This option enables memory changes tracking by introducing a
+         soft-dirty bit on pte-s. This bit it set when someone writes
+         into a page just as regular dirty bit, but unlike the latter
+         it can be cleared by hands.
+
+         See Documentation/vm/soft-dirty.txt for more details.