mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-30 09:31:01 +00:00
224ed7e798
This is essentially what's been done for the official NixOS build slaves
and I'm using it as well for a few of my machines and my own Hydra
slaves.
Here's the same implementation from the Delft server configurations:
f47c2fc7f8/delft/common.nix (L91-L101)
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
19 lines
472 B
Nix
19 lines
472 B
Nix
{ config, lib, ... }:
|
|
|
|
{
|
|
options.hardware.enableKSM = lib.mkEnableOption "Kernel Same-Page Merging";
|
|
|
|
config = lib.mkIf config.hardware.enableKSM {
|
|
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
|
|
fi
|
|
'';
|
|
};
|
|
};
|
|
}
|