[pve-devel] [PATCH docs 3/3] kernel samepage merging: describe how to disable for a specific VM

[Fiona Ebner]

Signed-off-by: Fiona Ebner <f.ebner at proxmox.com>
---
 kernel-samepage-merging.adoc | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/kernel-samepage-merging.adoc b/kernel-samepage-merging.adoc
index 5f55403..e2e70d7 100644
--- a/kernel-samepage-merging.adoc
+++ b/kernel-samepage-merging.adoc
@@ -34,7 +34,11 @@ be a legal requirement.
 Disabling KSM
 ~~~~~~~~~~~~~
 
-To see if KSM is active, you can check the output of:
+KSM can be disabled on a node or on a per-VM basis.
+
+.Disabe KSM on a Node
+
+To see if KSM is active on a node, you can check the output of:
 
 ----
 # systemctl status ksmtuned
@@ -52,3 +56,11 @@ Finally, to unmerge all the currently merged pages, run:
 # echo 2 > /sys/kernel/mm/ksm/run
 ----
 
+.Disabe KSM for a Specific VM
+
+The `allow-ksm` VM configuration option controls whether memory page merging is
+allowed for a given VM. The option defaults to true and can be disabled with:
+
+----
+# qm set <vmid> --allow-ksm 0
+----
-- 
2.39.5