machines/oignon/hardware.nix

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