Linux kernel: Difference between revisions
imported>Mth mNo edit summary |
imported>Tfc Add make-linux-fast-again script |
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{ | { | ||
boot.extraModulePackages = with config.boot.kernelPackages; [ wireguard ]; | boot.extraModulePackages = with config.boot.kernelPackages; [ wireguard ]; | ||
} | |||
</syntaxHighlight> | |||
=== Custom kernel commandline === | |||
The config attribute <code>boot.kernelParams</code> can be set to supply the Linux kernel with additional command line arguments at boot time. | |||
The following example downloads command line arguments from [https://make-linux-fast-again.com make-linux-fast-again.com] that are known to disable CPU vulnerability mitigations that have a negative performance impact on the system: | |||
<syntaxHighlight lang="nix"> | |||
# file: make-linux-fast-again.nix | |||
{ pkgs, config, ... }: | |||
let | |||
cmdline = builtins.readFile ( | |||
builtins.fetchurl "https://make-linux-fast-again.com" | |||
); | |||
in { | |||
boot.kernelParams = pkgs.lib.splitString " " cmdline; | |||
} | |||
</syntaxHighlight> | |||
The easiest way to use this is to store this file in the <code>/etc/nixos</code> folder and then put it into the <code>imports</code> list in <code>/etc/nixos/configuration.nix</code> file like this: | |||
<syntaxHighlight lang="nix"> | |||
{ pkgs, config, ... }: | |||
{ | |||
imports = [ | |||
./make-linux-fast-again.nix | |||
]; | |||
# ... | |||
} | } | ||
</syntaxHighlight> | </syntaxHighlight> | ||