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author | Alyssa Ross <hi@alyssa.is> | 2022-05-31 09:59:33 +0000 |
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committer | Alyssa Ross <hi@alyssa.is> | 2022-05-31 09:59:57 +0000 |
commit | 9ff36293d1e428cd7bf03e8d4b03611b6d361c28 (patch) | |
tree | 1ab51a42b868c55b83f6ccdb80371b9888739dd9 /nixos/modules/hardware/ksm.nix | |
parent | 1c4fcd0d4b0541e674ee56ace1053e23e562cc80 (diff) | |
parent | ddc3c396a51918043bb0faa6f676abd9562be62c (diff) | |
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Last good Nixpkgs for Weston+nouveau? archive
I came this commit hash to terwiz[m] on IRC, who is trying to figure out what the last version of Spectrum that worked on their NUC with Nvidia graphics is.
Diffstat (limited to 'nixos/modules/hardware/ksm.nix')
-rw-r--r-- | nixos/modules/hardware/ksm.nix | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/nixos/modules/hardware/ksm.nix b/nixos/modules/hardware/ksm.nix new file mode 100644 index 00000000000..829c3532c45 --- /dev/null +++ b/nixos/modules/hardware/ksm.nix @@ -0,0 +1,38 @@ +{ 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" ]; + script = + '' + echo 1 > /sys/kernel/mm/ksm/run + '' + optionalString (cfg.sleep != null) + '' + echo ${toString cfg.sleep} > /sys/kernel/mm/ksm/sleep_millisecs + ''; + }; + }; +} |