diff options
Diffstat (limited to 'nixos/modules/tasks/scsi-link-power-management.nix')
-rw-r--r-- | nixos/modules/tasks/scsi-link-power-management.nix | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/nixos/modules/tasks/scsi-link-power-management.nix b/nixos/modules/tasks/scsi-link-power-management.nix new file mode 100644 index 000000000000..4927952080f6 --- /dev/null +++ b/nixos/modules/tasks/scsi-link-power-management.nix @@ -0,0 +1,44 @@ +{ config, pkgs, ... }: + +with pkgs.lib; + +{ + ###### interface + + options = { + + powerManagement.scsiLinkPolicy = mkOption { + default = ""; + example = "min_power"; + type = types.str; + description = '' + Configure the SCSI link power management policy. By default, + the kernel configures "max_performance". + ''; + }; + + }; + + + ###### implementation + + config = mkIf (config.powerManagement.scsiLinkPolicy != "") { + + jobs."scsi-link-pm" = + { description = "SCSI Link Power Management Policy"; + + startOn = "stopped udevtrigger"; + + task = true; + + script = '' + shopt -s nullglob + for x in /sys/class/scsi_host/host*/link_power_management_policy; do + echo ${config.powerManagement.scsiLinkPolicy} > $x + done + ''; + }; + + }; + +} |