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nixos/zram: use nixos/zram-generator as backing implementation

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Nick Cao 2023-08-13 15:38:40 +08:00
parent a7e095d9fd
commit 0814089e05
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1 changed files with 18 additions and 29 deletions
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47
nixos/modules/config/zram.nix
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@ -105,36 +105,25 @@ in
}
];
services.zram-generator.enable = true;
system.requiredKernelConfig = with config.lib.kernelConfig; [
(isModule "ZRAM")
];
# Disabling this for the moment, as it would create and mkswap devices twice,
# once in stage 2 boot, and again when the zram-reloader service starts.
# boot.kernelModules = [ "zram" ];
systemd.packages = [ pkgs.zram-generator ];
systemd.services."systemd-zram-setup@".path = [ pkgs.util-linux ]; # for mkswap
environment.etc."systemd/zram-generator.conf".source =
(pkgs.formats.ini { }).generate "zram-generator.conf" (lib.listToAttrs
(builtins.map
(dev: {
name = dev;
value =
let
size = "${toString cfg.memoryPercent} / 100 * ram";
in
{
zram-size = if cfg.memoryMax != null then "min(${size}, ${toString cfg.memoryMax} / 1024 / 1024)" else size;
compression-algorithm = cfg.algorithm;
swap-priority = cfg.priority;
} // lib.optionalAttrs (cfg.writebackDevice != null) {
writeback-device = cfg.writebackDevice;
};
})
devices));
services.zram-generator.settings = lib.listToAttrs
(builtins.map
(dev: {
name = dev;
value =
let
size = "${toString cfg.memoryPercent} / 100 * ram";
in
{
zram-size = if cfg.memoryMax != null then "min(${size}, ${toString cfg.memoryMax} / 1024 / 1024)" else size;
compression-algorithm = cfg.algorithm;
swap-priority = cfg.priority;
} // lib.optionalAttrs (cfg.writebackDevice != null) {
writeback-device = cfg.writebackDevice;
};
})
devices);
};