{ lib, config, pkgs, ... }:

with lib;
let
  # TODO: move this dawg
  cfg = config.modules.software.system.zswap;
in {
  options.modules.software.system.zswap = {
    enable = mkEnableOption "Enable zswap, a compressed RAM cache for swap pages";
  };

  config = mkIf cfg.enable {
    boot.kernelParams = [
      "zswap.enabled=1"
      "zswap.shrinker_enabled=1" # high mem: shrink zswap, mv to swap
      "zswap.max_pool_percent=20" # TODO: tune this (keep in mind shrinker is enabled)
      "zswap.compressor=zstd"
      "zswap.zpool=zsmalloc"
    ];
  };
}