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>
18 lines
472 B
Nix
18 lines
472 B
Nix
{ config, lib, ... }:
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{
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options.hardware.enableKSM = lib.mkEnableOption "Kernel Same-Page Merging";
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config = lib.mkIf config.hardware.enableKSM {
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systemd.services.enable-ksm = {
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description = "Enable Kernel Same-Page Merging";
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wantedBy = [ "multi-user.target" ];
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after = [ "systemd-udev-settle.service" ];
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script = ''
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if [ -e /sys/kernel/mm/ksm ]; then
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echo 1 > /sys/kernel/mm/ksm/run
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fi
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'';
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};
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};
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}
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