mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-30 17:41:12 +00:00
4ee3e8b21d
A centralized list for these renames is not good because: - It breaks disabledModules for modules that have a rename defined - Adding/removing renames for a module means having to find them in the central file - Merge conflicts due to multiple people editing the central file
39 lines
995 B
Nix
39 lines
995 B
Nix
{ config, lib, ... }:
|
|
|
|
with lib;
|
|
|
|
let
|
|
cfg = config.hardware.ksm;
|
|
|
|
in {
|
|
imports = [
|
|
(mkRenamedOptionModule [ "hardware" "enableKSM" ] [ "hardware" "ksm" "enable" ])
|
|
];
|
|
|
|
options.hardware.ksm = {
|
|
enable = mkEnableOption "Kernel Same-Page Merging";
|
|
sleep = mkOption {
|
|
type = types.nullOr types.int;
|
|
default = null;
|
|
description = ''
|
|
How many milliseconds ksmd should sleep between scans.
|
|
Setting it to <literal>null</literal> uses the kernel's default time.
|
|
'';
|
|
};
|
|
};
|
|
|
|
config = mkIf cfg.enable {
|
|
systemd.services.enable-ksm = {
|
|
description = "Enable Kernel Same-Page Merging";
|
|
wantedBy = [ "multi-user.target" ];
|
|
after = [ "systemd-udev-settle.service" ];
|
|
script = ''
|
|
if [ -e /sys/kernel/mm/ksm ]; then
|
|
echo 1 > /sys/kernel/mm/ksm/run
|
|
${optionalString (cfg.sleep != null) ''echo ${toString cfg.sleep} > /sys/kernel/mm/ksm/sleep_millisecs''}
|
|
fi
|
|
'';
|
|
};
|
|
};
|
|
}
|