Merge remote-tracking branch 'origin/master' into staging

nixos/modules/system/boot/kexec.nix

@@ -1,7 +1,7 @@
 { config, pkgs, lib, ... }:
 
 {
-  config = lib.mkIf (pkgs.kexectools != null) {
+  config = lib.mkIf (pkgs.kexectools.meta.available) {
     environment.systemPackages = [ pkgs.kexectools ];
 
     systemd.services."prepare-kexec" =

nixos/modules/system/boot/systemd.nix

@@ -523,6 +523,14 @@ in
       '';
     };
 
+    systemd.enableCgroupAccounting = mkOption {
+      default = false;
+      type = types.bool;
+      description = ''
+        Whether to enable cgroup accounting.
+      '';
+    };
+
     systemd.extraConfig = mkOption {
       default = "";
       type = types.lines;
@@ -724,6 +732,13 @@ in
 
       "systemd/system.conf".text = ''
         [Manager]
+        ${optionalString config.systemd.enableCgroupAccounting ''
+          DefaultCPUAccounting=yes
+          DefaultIOAccounting=yes
+          DefaultBlockIOAccounting=yes
+          DefaultMemoryAccounting=yes
+          DefaultTasksAccounting=yes
+        ''}
         ${config.systemd.extraConfig}
       '';