mbind(): fix leak of never putback pages

[firefly-linux-kernel-4.4.55.git] / mm / Kconfig

diff --git a/mm/Kconfig b/mm/Kconfig
index edd300aca17309cfb6c2e1ef9cef2fcf36de1d74..57963c6063d1be3158bbc01c3e69dc0473b1d524 100644 (file)
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -224,7 +224,9 @@ config KSM
          the many instances by a single resident page with that content, so
          saving memory until one or another app needs to modify the content.
          Recommended for use with KVM, or with other duplicative applications.
-         See Documentation/vm/ksm.txt for more information.
+         See Documentation/vm/ksm.txt for more information: KSM is inactive
+         until a program has madvised that an area is MADV_MERGEABLE, and
+         root has set /sys/kernel/mm/ksm/run to 1 (if CONFIG_SYSFS is set).
 
 config DEFAULT_MMAP_MIN_ADDR
         int "Low address space to protect from user allocation"