hosts/oignon/hardware.nix

   1 { config, lib, pkgs, hostName, ... }:
   2 {
   3 hardware.cpu.intel.updateMicrocode = true;
   4 powerManagement.cpuFreqGovernor = lib.mkDefault "ondemand";
   5 services.thinkfan = {
   6   enable = true;
   7   levels = ''
   8     (0,     0,      57)
   9     (1,     56,     62)
  10     (2,     61,     65)
  11     (3,     64,     66)
  12     (4,     65,     68)
  13     (5,     67,     71)
  14     (6,     70,     76)
  15     (7,     75,     81)
  16     (127,   80,     32767)
  17   '';
  18 };
  19 hardware.acpilight.enable = true;
  20 services.acpid = {
  21   enable = true;
  22   handlers = {
  23     brightnessDown = {
  24       event = "video/brightnessdown.*";
  25       action = "${pkgs.acpilight}/bin/xbacklight -dec 5";
  26     };
  27     brightnessUp = {
  28       event = "video/brightnessup.*";
  29       action = "${pkgs.acpilight}/bin/xbacklight -inc 5";
  30     };
  31     acAdapter = {
  32       event = "ac_adapter/*";
  33       action = ''
  34         vals=($1)
  35         case ''${vals[3]} in
  36           00000000) # unplugged
  37             ${pkgs.linuxPackages.cpupower}/bin/cpupower frequency-set -g powersave;;
  38           00000001) # plugged in
  39             ${pkgs.linuxPackages.cpupower}/bin/cpupower frequency-set -g ondemand;;
  40         esac
  41       '';
  42     };
  43   };
  44 };
  45
  46 # https://bugzilla.kernel.org/show_bug.cgi?id=110941
  47 boot.kernelParams = [ "intel_pstate=no_hwp" ];
  48 boot.kernelModules = [ "kvm-intel" ];
  49 boot.cleanTmpDir = true;
  50 boot.tmpOnTmpfs = true;
  51 boot.extraModulePackages = [
  52   config.boot.kernelPackages.exfat-nofuse
  53 ];
  54 boot.loader.grub = {
  55   enable  = true;
  56   version = 2;
  57   device  = "/dev/disk/by-id/ata-Samsung_SSD_850_PRO_128GB_S1SMNSAFC36436X";
  58   configurationLimit = 3;
  59   #zfsSupport = true;
  60   /*
  61   efiSupport = true;
  62   efi = {
  63     canTouchEfiVariables = false;
  64     efiSysMountPoint = "/boot/efi";
  65   };
  66   */
  67   #enableCryptodisk = true;
  68 };
  69
  70 fileSystems."/boot" =
  71   { device = "/dev/disk/by-partlabel/${hostName}_ssd_boot";
  72     fsType = "ext2";
  73   };
  74 fileSystems."/boot/efi" =
  75   { device = "/dev/disk/by-partlabel/${hostName}_ssd_efi";
  76     fsType = "vfat";
  77   };
  78 swapDevices = [
  79   { device = "/dev/disk/by-partlabel/${hostName}_ssd_swap";
  80     randomEncryption = {
  81       enable = true;
  82       cipher = "aes-xts-plain64";
  83       source = "/dev/urandom";
  84     };
  85   }
  86 ];
  87 zramSwap = {
  88   enable = true;
  89   algorithm = lib.mkDefault "zstd";
  90   # There is little point creating a zram of greater
  91   # than twice the size of memory
  92   # since we expect a 2:1 compression ratio.
  93   # Note that zram uses about 0.1% of the size of the disk
  94   # when not in use so a huge zram is wasteful.
  95   memoryPercent = lib.mkDefault 150;
  96   # Linux supports multithreaded compression for 1 device since 3.15.
  97   # See https://lkml.org/lkml/2014/2/28/404 for details.
  98   swapDevices = lib.mkDefault 1;
  99 };
 100 boot.kernel.sysctl = {
 101   # Increase cache pressure, which increases the tendency of the kernel to
 102   # reclaim memory used for caching of directory and inode objects. You will use
 103   # less memory over a longer period of time. The performance hit is negated by
 104   # the downside of swapping sooner.
 105   "vm.vfs_cache_pressure" = lib.mkDefault 500;
 106
 107   # Increasing how aggressively the kernel will swap memory pages since we are
 108   # using ZRAM first.
 109   "vm.swappiness" = lib.mkDefault 100;
 110
 111   # Background processes will start writing right away when it hits the 1% limit
 112   "vm.dirty_background_ratio" = lib.mkDefault 1;
 113
 114   # The system won’t force synchronous I/O until it gets to 50% dirty_ratio.
 115   "vm.dirty_ratio" = lib.mkDefault 50;
 116 };
 117
 118 # The 32-bit host id of the host, formatted as 8 hexadecimal characters.
 119 # You should try to make this id unique among your hosts.
 120 # Manually generated with : head -c4 /dev/urandom | od -A none -t x4 | cut -d ' ' -f 2
 121 networking.hostId = "ce53d0c3";
 122
 123 # none is the recommended elevator with ZFS (which has its own I/O scheduler)
 124 # and/or for SSD, whereas HDD could use mq-deadline.
 125 services.udev.extraRules = ''
 126   # set none scheduler for non-rotating disks
 127   ACTION=="add|change", KERNEL=="sd[a-z]", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="none"
 128 '';
 129
 130 boot.supportedFilesystems = [ "zfs" ];
 131 boot.initrd.supportedFilesystems = [ "zfs" ];
 132 boot.initrd.availableKernelModules = [
 133   "ahci"
 134   "drbg"
 135   "ehci_pci"
 136   "gf128mul"
 137   "hmac"
 138   "sd_mod"
 139 ];
 140
 141 boot.zfs.forceImportAll  = false;
 142 boot.zfs.forceImportRoot = false;
 143 boot.zfs.enableUnstable = false;
 144 boot.zfs.requestEncryptionCredentials = [ hostName ];
 145 services.zfs.autoScrub.enable = true;
 146 environment.systemPackages = [ pkgs.zfs ];
 147
 148 fileSystems."/" =
 149   { device = "${hostName}/root";
 150     fsType = "zfs";
 151   };
 152 fileSystems."/nix" =
 153   { device = "${hostName}/nix";
 154     fsType = "zfs";
 155   };
 156 fileSystems."/var" =
 157   { device = "${hostName}/var";
 158     fsType = "zfs";
 159   };
 160
 161 }