From 4bb890da7a6ac53216cc304cfcecaecdcaa1cc66 Mon Sep 17 00:00:00 2001
From: Jean-Pierre PRUNARET <jean-pierre+git@prunetwork.fr>
Date: Sun, 13 Nov 2016 16:10:12 +0100
Subject: [PATCH] =?UTF-8?q?r=C3=A8gles=20pour=20les=20SSD?=
MIME-Version: 1.0
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---
 public/public.nix |  1 +
 public/udev.nix   | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+)
 create mode 100644 public/udev.nix

diff --git a/public/public.nix b/public/public.nix
index 2389b1d..f8e9dd3 100644
--- a/public/public.nix
+++ b/public/public.nix
@@ -18,6 +18,7 @@ in
     ./service-haveged.nix
     ./service-monitoring.nix
     ./service-ssh.nix
+    ./udev.nix
 
     # commandées par config-generator
     ## option de configuration spécifique
diff --git a/public/udev.nix b/public/udev.nix
new file mode 100644
index 0000000..cf4bfa6
--- /dev/null
+++ b/public/udev.nix
@@ -0,0 +1,18 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) mkIf mkMerge mkThenElse;
+  cfg = config.r6d.config-generator;
+  computers = config.r6d.computers;
+  profiles = config.r6d.profiles;
+in
+
+{
+  # Définition du IO Scheduler pour les SSD
+  services.udev.extraRules = ''
+  # set deadline scheduler for non-rotating disks
+  # according to https://wiki.debian.org/SSDOptimization, deadline is preferred over noop
+  ACTION=="add|change", KERNEL=="sd[a-z]", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="deadline"
+  '';
+
+}