Use nested instead of flat btrfs subvolumes, noatime mount flag This took me an embarrassingly long time to decide since idk it was very OCD inducing but anyways it's much simpler to use nested subvolumes and the main advantage of flat is being able to switch out your root subvolume which I would just never do in the first place. Also, systemd-tmpfiles already creates a lot of subvolumes so it's a bit awkward to have an arbitrary Arch-inspired manual list that get mounted and have some that tmpfiles itself created. And anyways it's just more elegant this way.

Changes

4 changed files (+13/-44)

• ThinkPad-X1-Yoga-Gen-6/hardware-configuration.nix
  • @@ -26,36 +26,11 @@
    fileSystems."/" = { device = "/dev/disk/by-uuid/854ed839-314f-44bd-b57f-655437c254bd"; fsType = "btrfs"; - options = [ "subvol=@" ]; }; boot.initrd.luks.devices."luksdev".device = "/dev/disk/by-uuid/f4e1fd6b-f03c-428f-a31e-7355a10b9a2c"; - fileSystems."/nix" = { - device = "/dev/disk/by-uuid/854ed839-314f-44bd-b57f-655437c254bd"; - fsType = "btrfs"; - options = [ "subvol=@nix" ]; - }; - - fileSystems."/var/log" = { - device = "/dev/disk/by-uuid/854ed839-314f-44bd-b57f-655437c254bd"; - fsType = "btrfs"; - options = [ "subvol=@log" ]; - }; - - fileSystems."/.snapshots" = { - device = "/dev/disk/by-uuid/854ed839-314f-44bd-b57f-655437c254bd"; - fsType = "btrfs"; - options = [ "subvol=@.snapshots" ]; - }; - - fileSystems."/home" = { - device = "/dev/disk/by-uuid/854ed839-314f-44bd-b57f-655437c254bd"; - fsType = "btrfs"; - options = [ "subvol=@home" ]; - }; - fileSystems."/boot" = { device = "/dev/disk/by-uuid/3A93-17DE"; fsType = "vfat";
• Unnamed-Server/default.nix
  • @@ -35,11 +35,9 @@
    content = { type = "btrfs"; subvolumes = { - "@".mountpoint = "/"; - "@nix".mountpoint = "/nix"; - "@log".mountpoint = "/var/log"; - "@.snapshots".mountpoint = "/.snapshots"; - "@home".mountpoint = "/home"; + "/".mountpoint = "/"; + "/nix" = { }; + "/.snapshots" = { }; }; }; };
• configuration.nix
  • @@ -40,16 +40,12 @@
    # I NEED ZSTD # NixOS is a disk destroyer - fileSystems = { - "/".options = [ "compress=zstd" ]; - "/home".options = [ "compress=zstd" ]; - "/var/log".options = [ "compress=zstd" ]; - "/.snapshots".options = [ "compress=zstd" ]; - "/nix".options = [ - "compress=zstd" - "noatime" - ]; - }; + # atime is an anti-feature + # This should boost perf on XVM + fileSystems."/".options = [ + "compress=zstd" + "noatime" + ]; # Download more RAM zramSwap.enable = true;
  • @@ -61,7 +57,7 @@
    description = "Anthony Wang"; # I can't bash you know shell = pkgs.fish; - initialPassword = "silly insecure password"; + initialPassword = "change asap"; }; # Enable the boring stuff
• flake.lock
  • @@ -61,11 +61,11 @@
    }, "nixpkgs": { "locked": { - "lastModified": 1745391562, - "narHash": "sha256-sPwcCYuiEopaafePqlG826tBhctuJsLx/mhKKM5Fmjo=", + "lastModified": 1745526057, + "narHash": "sha256-ITSpPDwvLBZBnPRS2bUcHY3gZSwis/uTe255QgMtTLA=", "owner": "NixOS", "repo": "nixpkgs", - "rev": "8a2f738d9d1f1d986b5a4cd2fd2061a7127237d7", + "rev": "f771eb401a46846c1aebd20552521b233dd7e18b", "type": "github" }, "original": {