77 lines
2.3 KiB
Nix
77 lines
2.3 KiB
Nix
{
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config,
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lib,
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pkgs,
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...
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}:
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with lib; let
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sed = "${pkgs.gnused}/bin/sed";
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cfg = config.custom.settings.boot;
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in {
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options.custom.settings.boot = {
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enable = mkOption {default = false;};
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console-mode = mkOption {default = "max";};
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grub = mkOption {default = false;};
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kernel = mkOption {
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default =
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if config.custom.full
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then pkgs.linuxPackages_6_12
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else pkgs.linuxPackages;
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};
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systemd-boot = mkOption {default = config.custom.minimal;};
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timeout = mkOption {
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default =
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if config.custom.minimal
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then 2
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else 10;
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};
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u-boot = mkOption {default = false;};
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};
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config = mkIf cfg.enable {
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boot = {
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# https://wiki.nixos.org/wiki/Linux_kernel
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kernelPackages = cfg.kernel;
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kernel.sysctl = mkIf config.custom.default {
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# https://wiki.archlinux.org/title/Sysctl#Virtual_memory
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"vm.dirty_bytes" = 256 * 1024 * 1024; # 256MB
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"vm.dirty_background_bytes" = 128 * 1024 * 1024; # 128MB
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"vm.vfs_cache_pressure" = 50; # Default: 100
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# https://wiki.archlinux.org/title/Swap#Swappiness
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"vm.swappiness" = 1; # Default: 60
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# https://redis.io/docs/latest/develop/get-started/faq/#background-saving-fails-with-a-fork-error-on-linux
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"vm.overcommit_memory" = 1;
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# https://docs.syncthing.net/users/faq.html#inotify-limits
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"fs.inotify.max_user_watches" = 204800;
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# https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes
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"net.core.rmem_max" = 7500000;
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"net.core.wmem_max" = 7500000;
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};
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loader = {
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timeout = cfg.timeout;
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systemd-boot = mkIf cfg.systemd-boot {
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enable = true;
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configurationLimit = 15;
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consoleMode = mkIf (!isInt cfg.console-mode || cfg.console-mode <= 2) cfg.console-mode;
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editor = false; # Disable cmdline
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# HACK: consoleMode does not accept undocumented device modes (e.g. 3 4 5)
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extraInstallCommands = mkIf (isInt cfg.console-mode && cfg.console-mode > 2) ''
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${sed} -i 's|console-mode.*|console-mode ${toString cfg.console-mode}|' /boot/loader/loader.conf
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'';
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};
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generic-extlinux-compatible.enable = cfg.u-boot;
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grub.enable = cfg.grub;
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};
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};
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};
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}
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