[PATCH RFC 5/5] mm/ksm, proc: add remote madvise documentation

Oleksandr Natalenko
2019-05-16T09:42:50Z

Document respective /proc/<pid>/madvise knob.

Signed-off-by: Oleksandr Natalenko <oleksandr@redhat.com>
---
Documentation/filesystems/proc.txt | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 66cad5c86171..17106e435bba 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -45,6 +45,7 @@ Table of Contents
3.9 /proc/<pid>/map_files - Information about memory mapped files
3.10 /proc/<pid>/timerslack_ns - Task timerslack value
3.11 /proc/<pid>/patch_state - Livepatch patch operation state
+ 3.12 /proc/<pid>/madvise - Remote madvise

4 Configuring procfs
4.1 Mount options
@@ -1948,6 +1949,18 @@ patched. If the patch is being enabled, then the task has already been
patched. If the patch is being disabled, then the task hasn't been
unpatched yet.

+3.12 /proc/<pid>/madvise - Remote madvise
+--------------------------------------------
+This write-only file allows executing madvise operation for another task.
+
+If CONFIG_KSM is enabled, the following actions are available:
+
+ * marking task's memory as mergeable:
+ # echo merge > /proc/<pid>/madvise
+
+ * unmerging all the task's memory:
+ # echo unmerge > /proc/<pid>/madvise
+

------------------------------------------------------------------------------
Configuring procfs
--
2.21.0