From eeb15830e9cd16ae75fe9743361033bd3f30acc1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karel=20Ko=C4=8D=C3=AD?= <cynerd@email.cz>
Date: Thu, 18 Aug 2022 08:41:35 +0200
Subject: nixos/modules/generic: enable BFQ for block devices

---
 nixos/modules/generic.nix | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'nixos')

diff --git a/nixos/modules/generic.nix b/nixos/modules/generic.nix
index 74bc314..29c2155 100644
--- a/nixos/modules/generic.nix
+++ b/nixos/modules/generic.nix
@@ -55,7 +55,6 @@ in {
       htop iotop #glances
       mc
       screen tmux
-      #ncdu
 
       # ls tools
       tree
@@ -118,6 +117,17 @@ in {
 
     time.timeZone = "Europe/Prague";
     i18n.defaultLocale = "en_US.UTF-8";
+
+    services.udev.packages =  [
+      (pkgs.writeTextFile rec {
+        name = "bfq-drives.rules";
+        destination = "/etc/udev/rules.d/60-${name}";
+        text = ''
+          ACTION=="add|change", KERNEL=="sd*[!0-9]", ATTR{queue/scheduler}="bfq"
+          ACTION=="add|change", KERNEL=="nvme*n[0-9]", ATTR{queue/scheduler}="bfq"
+        '';
+      })
+    ];
   };
 
 }
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