nixos/profiles/systemd-oomd.nix

   1 {
   2   config,
   3   lib,
   4   ...
   5 }:
   6 let
   7   cfg = config.systemd.oomd;
   8 in
   9 {
  10   systemd.oomd = {
  11     enable = lib.mkDefault true;
  12     enableRootSlice = lib.mkDefault true;
  13     enableSystemSlice = lib.mkDefault true;
  14     enableUserSlices = lib.mkDefault true;
  15   };
  16   systemd.slices."-".sliceConfig = lib.mkIf cfg.enableRootSlice {
  17     ManagedOOMMemoryPressure = "kill";
  18     ManagedOOMMemoryPressureLimit = lib.mkDefault "80%";
  19     ManagedOOMSwap = "kill";
  20     ManagedOOMSwapLimit = lib.mkDefault "80%";
  21   };
  22   systemd.slices."system".sliceConfig = lib.mkIf cfg.enableSystemSlice {
  23     ManagedOOMMemoryPressure = "kill";
  24     ManagedOOMMemoryPressureLimit = lib.mkDefault "80%";
  25     ManagedOOMSwap = "kill";
  26     ManagedOOMSwapLimit = lib.mkDefault "80%";
  27   };
  28   systemd.slices."user".sliceConfig = lib.mkIf cfg.enableUserSlices {
  29     ManagedOOMMemoryPressure = "kill";
  30     ManagedOOMMemoryPressureLimit = lib.mkDefault "80%";
  31     ManagedOOMSwap = "kill";
  32     ManagedOOMSwapLimit = lib.mkDefault "80%";
  33   };
  34   systemd.user.units."slice" = lib.mkIf cfg.enableUserSlices (
  35     lib.mkForce {
  36       text = ''
  37         [Slice]
  38         ManagedOOMMemoryPressure=kill
  39         ManagedOOMMemoryPressureLimit=80%
  40         ManagedOOMSwap=kill
  41         ManagedOOMSwapLimit=80%
  42       '';
  43       overrideStrategy = "asDropin";
  44     }
  45   );
  46
  47 }