cachyos kernel

system/system-yarn.nix

@@ -18,6 +18,22 @@
     inputs.jovian-nixos.nixosModules.default
   ];
 
+  # cachyos kernel: bore scheduler, full lto, zen 3 (5800x)
+  boot.kernelPackages =
+    let
+      helpers = pkgs.callPackage "${inputs.nix-cachyos-kernel}/helpers.nix" { };
+      kernel = pkgs.cachyosKernels.linux-cachyos-bore-lto.override {
+        lto = "full";
+        processorOpt = "x86_64-v3";
+        structuredExtraConfig = with lib.kernel; {
+          # x86_64-v3 is the ISA level; pin to zen 3 for microarch tuning
+          GENERIC_CPU = lib.mkForce no;
+          MZEN3 = lib.mkForce yes;
+        };
+      };
+    in
+    helpers.kernelModuleLLVMOverride (pkgs.linuxKernel.packagesFor kernel);
+
   fileSystems."/media/games" = {
     device = "/dev/disk/by-uuid/1878136e-765d-4784-b204-3536ab4fdac8";
     fsType = "f2fs";