From 41676002b28dc0e71306e309c2805438ed256517 Mon Sep 17 00:00:00 2001
From: davidak <git@davidak.de>
Date: Sat, 10 Mar 2018 22:23:42 +0100
Subject: [PATCH] nixos/systemd: add option for cgroup accounting

---
 nixos/modules/system/boot/systemd.nix | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/nixos/modules/system/boot/systemd.nix b/nixos/modules/system/boot/systemd.nix
index 92c9ee0c469..b8a2d42e0fb 100644
--- a/nixos/modules/system/boot/systemd.nix
+++ b/nixos/modules/system/boot/systemd.nix
@@ -524,6 +524,14 @@ in
       '';
     };
 
+    systemd.enableCgroupAccounting = mkOption {
+      default = false;
+      type = types.bool;
+      description = ''
+        Whether to enable cgroup accounting.
+      '';
+    };
+
     systemd.extraConfig = mkOption {
       default = "";
       type = types.lines;
@@ -725,6 +733,13 @@ in
 
       "systemd/system.conf".text = ''
         [Manager]
+        ${optionalString config.systemd.enableCgroupAccounting ''
+          DefaultCPUAccounting=yes
+          DefaultIOAccounting=yes
+          DefaultBlockIOAccounting=yes
+          DefaultMemoryAccounting=yes
+          DefaultTasksAccounting=yes
+        ''}
         ${config.systemd.extraConfig}
       '';