From b16e6261ad2f0bca6ac2a4b7a4d3377cf5e3d95d Mon Sep 17 00:00:00 2001
From: Kenny MacDermid <kenny@macdermid.ca>
Date: Fri, 17 Nov 2023 13:11:05 -0400
Subject: [PATCH] Make Kernel Samepage Merging optional

As MicroVMs work fine without KSM enabled, it should probably be
optional. While KSM can improve a lot of workloads, it can harm
others, and so this configuration should not conflict with a value
explicitly set by the user.
---
 nixos-modules/host.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nixos-modules/host.nix b/nixos-modules/host.nix
index 75eef750..6085183b 100644
--- a/nixos-modules/host.nix
+++ b/nixos-modules/host.nix
@@ -466,6 +466,6 @@ in
     '';
 
     # Enable Kernel Same-Page Merging
-    hardware.ksm.enable = true;
+    hardware.ksm.enable = lib.mkDefault true;
   };
 }