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-rw-r--r--Documentation/vm/ksm.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/vm/ksm.txt b/Documentation/vm/ksm.txt
index b392e496f81..25cc89ba811 100644
--- a/Documentation/vm/ksm.txt
+++ b/Documentation/vm/ksm.txt
@@ -58,6 +58,13 @@ sleep_millisecs - how many milliseconds ksmd should sleep before next scan
e.g. "echo 20 > /sys/kernel/mm/ksm/sleep_millisecs"
Default: 20 (chosen for demonstration purposes)
+merge_across_nodes - specifies if pages from different numa nodes can be merged.
+ When set to 0, ksm merges only pages which physically
+ reside in the memory area of same NUMA node. It brings
+ lower latency to access to shared page. Value can be
+ changed only when there is no ksm shared pages in system.
+ Default: 1
+
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,