linux-kernel - [PATCH V3 4/4] KSM: mark_new

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Date:	Tue, 11 Nov 2014 15:57:36 +0300
From:	Timofey Titovets <nefelim4ag@...il.com>
To:	linux-mm@...ck.org
Cc:	nefelim4ag@...il.com, marco.antonio.780@...il.com,
	linux-kernel@...r.kernel.org, tonyb@...ernetics.com,
	killertofu@...il.com
Subject: [PATCH V3 4/4] KSM: mark_new_vma added to Documentation.

Signed-off-by: Timofey Titovets <nefelim4ag@...il.com>
---
 Documentation/vm/ksm.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/vm/ksm.txt b/Documentation/vm/ksm.txt
index f34a8ee..880fdbf 100644
--- a/Documentation/vm/ksm.txt
+++ b/Documentation/vm/ksm.txt
@@ -24,6 +24,8 @@ KSM only operates on those areas of address space which an application
 has advised to be likely candidates for merging, by using the madvise(2)
 system call: int madvise(addr, length, MADV_MERGEABLE).
 
+Also KSM can mark anonymous memory as mergeable, see below.
+
 The app may call int madvise(addr, length, MADV_UNMERGEABLE) to cancel
 that advice and restore unshared pages: whereupon KSM unmerges whatever
 it merged in that range.  Note: this unmerging call may suddenly require
@@ -73,6 +75,11 @@ merge_across_nodes - specifies if pages from different numa nodes can be merged.
                    merge_across_nodes, to remerge according to the new setting.
                    Default: 1 (merging across nodes as in earlier releases)
 
+mark_new_vma     - set 0 to disallow ksm marking every new allocated anonymous
+                   memory as mergeable.
+                   set 1 to allow ksm mark every new allocated anonymous memory
+                   as mergeable
+
 run              - set 0 to stop ksmd from running but keep merged pages,
                    set 1 to run ksmd e.g. "echo 1 > /sys/kernel/mm/ksm/run",
                    set 2 to stop ksmd and unmerge all pages currently merged,
-- 
2.1.3

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