2023-01-05

7 files changed, 64 insertions, 47 deletions

diff --git a/nixosConfigurations/default.nix b/nixosConfigurations/default.nix
index 1ca634a..fe998cd 100644
--- a/nixosConfigurations/default.nix
+++ b/nixosConfigurations/default.nix
@@ -69,6 +69,7 @@ in
     # A beefy desktop: 7950x/rx6750xt/128GB.
     eonwe.modules = with inputs; [
       nixos-hardware.nixosModules.common-cpu-amd
+      nixos-hardware.nixosModules.common-cpu-amd-pstate
       nixos-hardware.nixosModules.common-gpu-amd
       nixos-hardware.nixosModules.common-pc-ssd
       nixpkgs.nixosModules.notDetected
diff --git a/nixosConfigurations/eonwe/default.nix b/nixosConfigurations/eonwe/default.nix
index a867837..f07aad3 100644
--- a/nixosConfigurations/eonwe/default.nix
+++ b/nixosConfigurations/eonwe/default.nix
@@ -15,6 +15,7 @@ with lib; {
 
     games = {
       lutris.enable = true;
+      minecraft.client.enable = true;
       steam.enable = true;
     };
     android.enable = true;
@@ -25,8 +26,12 @@ with lib; {
   };
 
   hm.programs = {
-    firefox.profiles.default.settings."media.ffmpeg.vaapi.enabled" = true;
+    # NOTE This produces very poor performance even though RX 6750 XT should
+    # handle VA-API hardware decoding for all major formats (including AV1) just
+    # fine.
+    firefox.profiles.default.settings."media.ffmpeg.vaapi.enabled" = false;
 
+    # Mostly just placebo. :^)
     mpv.config = {
       hwdec = "vdpau";
       vo = "gpu";
@@ -34,6 +39,15 @@ with lib; {
     };
   };
 
+  # Usually stuff that is going to be compiled on this machine is going to have
+  # parallelisation support enabled, so we will make sure that all cores are
+  # utilised and limit the job queue to one.
+  nix.extraOptions = ''
+    keep-going = true
+    max-jobs = 1
+    cores = 32
+  '';
+
   boot = {
     # Silence benign MCE errors:
     # ```
@@ -43,16 +57,26 @@ with lib; {
     # ```
     kernelParams = ["mce=nobootlog"];
 
-    initrd.availableKernelModules = [
-      "ahci"
-      "nvme"
-      "sd_mod"
-      "usb_storage"
-      "usbhid"
-      "xhci_pci"
-    ];
+    # The boot drive is Samsung SSD 980 PRO 2TB.
+    initrd.kernelModules = ["nvme"];
   };
 
+  # TODO Immutable `/' shire on ZFS datasets and snapshots.
+  #
+  # Opt-in:
+  # - /etc/NetworkManager
+  # - /etc/ssh
+  # - /home
+  # - /var/lib/bluetooth
+  # - /var/lib/iwd
+  # - /var/lib/log
+  #
+  # Investigate:
+  # - /var/lib/NetworkManager
+  # - /var/lib/cni
+  # - /var/lib/containers
+  # - /var/lib/qemu
+
   fileSystems = {
     "/boot" = {
       device = "/dev/disk/by-uuid/FF1E-9CFD";
@@ -66,7 +90,8 @@ with lib; {
     };
   };
 
-  # No swap space is declared here because the system already has 128Gb of RAM.
-  # I didn't manage to even hit 100Gb mark even when running large
-  # computations/compiling something big.
+  # No swap space is declared here because the system already has 128Gb of RAM. :^)
+  # I've only manage to hit around 100Gb mark when running large
+  # computations/compiling something big. Pretty sure that a hefty chunk of it
+  # was just residual cache and it wouldn't make me get to OOM situations.
 }
diff --git a/nixosConfigurations/iso/default.nix b/nixosConfigurations/iso/default.nix
index e435d0b..914fea9 100644
--- a/nixosConfigurations/iso/default.nix
+++ b/nixosConfigurations/iso/default.nix
@@ -7,6 +7,7 @@ with lib; {
   secrets = mkForce {};
 
   nixfiles.modules = {
+    common.networking.onlyDefault = true;
     git.client.enable = true;
     openssh = {
       client.enable = true;
@@ -21,7 +22,5 @@ with lib; {
 
   services.getty.autologinUser = mkForce my.username;
 
-  environment.noXlibs = false;
-
   nixpkgs.config.allowBroken = true;
 }
diff --git a/nixosConfigurations/manwe/default.nix b/nixosConfigurations/manwe/default.nix
index b8dd324..a079579 100644
--- a/nixosConfigurations/manwe/default.nix
+++ b/nixosConfigurations/manwe/default.nix
@@ -52,10 +52,6 @@ with lib; {
     };
 
     initrd.availableKernelModules = [
-      "ata_piix"
-      "sd_mod"
-      "sr_mod"
-      "uhci_hcd"
       "virtio_pci"
       "virtio_scsi"
     ];
diff --git a/nixosConfigurations/melian/default.nix b/nixosConfigurations/melian/default.nix
index 3ba854c..d7563d7 100644
--- a/nixosConfigurations/melian/default.nix
+++ b/nixosConfigurations/melian/default.nix
@@ -13,6 +13,8 @@ with lib; {
     bluetooth.enable = true;
 
     throttled.enable = true;
+
+    android.enable = true;
   };
 
   hardware.trackpoint = {
@@ -26,13 +28,17 @@ with lib; {
   in {
     enable = true;
 
-    # This fixes an issue with not being able to suspend or wake up from suspend
-    # due to a kernel bug[1].
+    # This fixes an issue with not being able to suspend or wake up from
+    # suspend due to a kernel bug[1] which is still not fixed.
+    #
+    # I guess this can also be fixed differently[2], which does look a lot nicer
+    # but I just can't bother.
     #
     # [1]: https://bbs.archlinux.org/viewtopic.php?id=270964
     # [1]: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/522998
     # [1]: https://bugs.launchpad.net/ubuntu/+source/pm-utils/+bug/562484/comments/3
     # [1]: https://gist.github.com/ioggstream/8f380d398aef989ac455b93b92d42048
+    # [2]: https://linrunner.de/tlp/settings/runtimepm.html
     powerDownCommands = "${modprobe} -r xhci_pci";
     powerUpCommands = "${modprobe} xhci_pci";
   };
@@ -40,7 +46,6 @@ with lib; {
   services = {
     thinkfan = {
       enable = true;
-
       settings = {
         sensors = [
           {
@@ -52,7 +57,7 @@ with lib; {
         fans = [{tpacpi = "/proc/acpi/ibm/fan";}];
         levels = [
           ["level auto" 0 50]
-          ["level disengaged" 50 32767]
+          ["level disengaged" 50 32767] # This could annoy some people but IDGAF.
         ];
       };
     };
@@ -60,23 +65,10 @@ with lib; {
     fwupd.enable = true;
   };
 
-  boot = {
-    initrd = {
-      availableKernelModules = [
-        "ahci"
-        "nvme"
-        "sd_mod"
-        "usb_storage"
-        "usbhid"
-        "xhci_pci"
-      ];
-
-      luks.devices."root" = {
-        device = "/dev/disk/by-uuid/c1b46f24-eec0-47d2-a142-75ddfd7bb218";
-        allowDiscards = true;
-        bypassWorkqueues = true;
-      };
-    };
+  boot.initrd.luks.devices."root" = {
+    device = "/dev/disk/by-uuid/c1b46f24-eec0-47d2-a142-75ddfd7bb218";
+    allowDiscards = true;
+    bypassWorkqueues = true;
   };
 
   fileSystems = {
diff --git a/nixosConfigurations/varda/default.nix b/nixosConfigurations/varda/default.nix
index 5e0914e..f08194e 100644
--- a/nixosConfigurations/varda/default.nix
+++ b/nixosConfigurations/varda/default.nix
@@ -26,10 +26,6 @@ with lib; {
     };
 
     initrd.availableKernelModules = [
-      "ata_piix"
-      "sd_mod"
-      "sr_mod"
-      "uhci_hcd"
       "virtio_pci"
       "virtio_scsi"
     ];
diff --git a/nixosConfigurations/yavanna/default.nix b/nixosConfigurations/yavanna/default.nix
index e3172a6..d347c61 100644
--- a/nixosConfigurations/yavanna/default.nix
+++ b/nixosConfigurations/yavanna/default.nix
@@ -20,10 +20,18 @@ with lib; {
       device = "/dev/sda";
     };
 
-    initrd = {
-      availableKernelModules = ["uhci_hcd" "ahci"];
-      kernelModules = ["nvme"];
-    };
+    # NOTE This is probably not required, but I cannot test this out without
+    # risking "bricking" my VPS because Kimsufi/OVH doesn't provide a console
+    # access. This configuration was generated via nixos-infect[1] and at the
+    # time I didn't bother to test for loaded kernel modules and just left the
+    # automatically (IIRC) generated `hardware-configuration.nix' as is.
+    #
+    # There's, however, no indication that any NVME drives are being used and,
+    # as the matter of fact, the VPS itself is KVM-shire, so... I'm still not
+    # going to risk it.
+    #
+    # [1]: https://github.com/elitak/nixos-infect
+    initrd.availableKernelModules = ["nvme"];
   };
 
   fileSystems."/" = {