hosts/mistral: kernel config

moni-dz · Nov 17, 2023 · f422cfc · f422cfc
1 parent 7bcde03
commit f422cfc
Showing 1 changed file with 50 additions and 0 deletions.
diff --git a/hosts/mistral/configuration.nix b/hosts/mistral/configuration.nix
@@ -5,6 +5,56 @@
     (modulesPath + "/virtualisation/digital-ocean-config.nix")
   ];
 
+  boot = {
+    /*
+      NOTE: replace this with your desired kernel, see: https://nixos.wiki/wiki/Linux_kernel for reference.
+
+      If you're not me or a XanMod kernel maintainer in Nixpkgs, use pkgs.linuxKernel.packages.linux_xanmod instead to avoid compilation.
+    */
+    kernelPackages = pkgs.linuxKernel.packages.linux_xanmod_latest;
+
+    kernelParams = [
+      "preempt=full"
+      "mitigations=off"
+      "quiet"
+      "udev.log_level=3"
+    ];
+
+    kernel.sysctl = {
+      "fs.file-max" = 2097152;
+      "kernel.printk" = "3 3 3 3";
+      "kernel.sched_migration_cost_ns" = 5000000;
+      "kernel.sched_nr_fork_threshold" = 3;
+      "kernel.sched_fake_interactive_win_time_ms" = 1000;
+      "kernel.unprivileged_userns_clone" = 1;
+      "net.core.default_qdisc" = "fq_pie";
+      "vm.dirty_ratio" = 60;
+      "vm.dirty_background_ratio" = 2;
+      "vm.swappiness" = 10;
+      "vm.vfs_cache_pressure" = 75;
+      "net.core.netdev_max_backlog" = 16384;
+      "net.core.somaxconn" = 8192;
+      "net.core.rmem_default" = 1048576;
+      "net.core.rmem_max" = 16777216;
+      "net.core.wmem_default" = 1048576;
+      "net.core.wmem_max" = 16777216;
+      "net.core.optmem_max" = 65536;
+      "net.ipv4.tcp_rmem" = "4096 1048576 2097152";
+      "net.ipv4.tcp_wmem" = "4096 65536 16777216";
+      "net.ipv4.udp_rmem_min" = 8192;
+      "net.ipv4.udp_wmem_min" = 8192;
+      "net.ipv4.tcp_fastopen" = 3;
+      "net.ipv4.tcp_keepalive_time" = 60;
+      "net.ipv4.tcp_keepalive_intvl" = 10;
+      "net.ipv4.tcp_keepalive_probes" = 6;
+      "net.ipv4.conf.default.log_martians" = 1;
+      "net.ipv4.conf.all.log_martians" = 1;
+      "net.ipv4.tcp_mtu_probing" = 1;
+      "net.ipv4.tcp_syncookies" = 1;
+      "net.ipv4.tcp_congestion_control" = "bbr2";
+    };
+  };
+
   nixpkgs.overlays = lib.mkOverride 10 [ inputs.nix-minecraft.overlay ];
 
   services.minecraft-servers = {