90 lines
2.5 KiB
Nix
90 lines
2.5 KiB
Nix
{ config, lib, pkgs, modulesPath, ... }:
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{
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imports = [ "${modulesPath}/installer/scan/not-detected.nix" ];
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boot = {
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initrd.availableKernelModules = [ "nvme" "xhci_pci" "ahci" "usb_storage" "usbhid" "sd_mod" ];
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initrd.kernelModules = [];
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extraModulePackages = [];
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kernelModules = [ "kvm-amd" ];
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kernelParams = [
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# HACK Disables fixes for spectre, meltdown, L1TF and a number of CPU
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# vulnerabilities. This is not a good idea for mission critical or
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# server/headless builds, but on my lonely home system I prioritize
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# raw performance over security. The gains are minor.
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"mitigations=off"
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# Limit ZFS cache to 8gb. Sure, this system has 64gb, but I don't want
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# this biting me when I'm running multiple VMs.
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"zfs.zfs_arc_max=8589934592"
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];
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};
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# CPU
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nix.maxJobs = lib.mkDefault 16;
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powerManagement.cpuFreqGovernor = "performance";
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hardware.cpu.amd.updateMicrocode = true;
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# Displays
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services.xserver = {
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# This must be done manually to ensure my screen spaces are arranged exactly
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# as I need them to be *and* the correct monitor is "primary". Using
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# xrandrHeads does not work.
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monitorSection = ''
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VendorName "Unknown"
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ModelName "DELL U2515H"
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HorizSync 30.0 - 113.0
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VertRefresh 56.0 - 86.0
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Option "DPMS"
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'';
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screenSection = ''
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Option "metamodes" "HDMI-0: nvidia-auto-select +1920+0, DVI-I-1: nvidia-auto-select +0+180, DVI-D-0: nvidia-auto-select +4480+180"
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Option "SLI" "Off"
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Option "MultiGPU" "Off"
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Option "BaseMosaic" "off"
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Option "Stereo" "0"
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Option "nvidiaXineramaInfoOrder" "DFP-1"
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'';
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};
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# Storage
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networking.hostId = "edd9f26b"; # required by zfs
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fileSystems = {
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"/" = {
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device = "/dev/disk/by-label/nixos";
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fsType = "ext4";
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options = [ "noatime" ];
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};
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"/boot" = {
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device = "/dev/disk/by-label/BOOT";
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fsType = "vfat";
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};
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"/home" = {
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device = "/dev/disk/by-label/home";
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fsType = "ext4";
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options = [ "noatime" ];
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};
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"/usr/backup" = {
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device = "usr/backup";
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fsType = "zfs";
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options = [ "nofail" ];
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};
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"/usr/media" = {
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device = "usr/media";
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fsType = "zfs";
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options = [ "nofail" ];
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};
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"/usr/local" = {
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device = "usr/local";
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fsType = "zfs";
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options = [ "nofail" ];
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};
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"/usr/share" = {
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device = "usr/share";
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fsType = "zfs";
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options = [ "nofail" ];
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};
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};
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swapDevices = [];
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}
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