From a31b37a6904397192ff025d7af0dd342322103ff Mon Sep 17 00:00:00 2001
From: Christoph Cullmann <christoph@cullmann.io>
Date: Sat, 24 Aug 2024 18:42:03 +0200
Subject: ssd tuning

see https://wiki.archlinux.org/title/Dm-crypt/Specialties#Disable_workqueue_for_increased_solid_state_drive_(SSD)_performance
---
 beta/hardware-configuration.nix | 1 +
 mini/hardware-configuration.nix | 2 ++
 neko/hardware-configuration.nix | 3 +++
 3 files changed, 6 insertions(+)

diff --git a/beta/hardware-configuration.nix b/beta/hardware-configuration.nix
index 215e221..af480f1 100644
--- a/beta/hardware-configuration.nix
+++ b/beta/hardware-configuration.nix
@@ -22,6 +22,7 @@
   boot.initrd.luks.devices."crypt0" = {
     device = "/dev/disk/by-id/nvme-SAMSUNG_MZVLB1T0HBLR-000L2_S4DZNX0R362286-part2";
     allowDiscards = true;
+    bypassWorkqueues = true;
   };
   fileSystems."/nix" =
     { device = "/dev/mapper/crypt0";
diff --git a/mini/hardware-configuration.nix b/mini/hardware-configuration.nix
index 2f837f3..ed48edd 100644
--- a/mini/hardware-configuration.nix
+++ b/mini/hardware-configuration.nix
@@ -22,10 +22,12 @@
   boot.initrd.luks.devices."crypt0" = {
     device = "/dev/disk/by-id/nvme-CT4000P3PSSD8_2325E6E63746-part2";
     allowDiscards = true;
+    bypassWorkqueues = true;
   };
   boot.initrd.luks.devices."crypt1" = {
     device = "/dev/disk/by-id/ata-CT2000MX500SSD1_2138E5D5061F";
     allowDiscards = true;
+    bypassWorkqueues = true;
   };
   fileSystems."/nix" =
     { device = "/dev/mapper/crypt0";
diff --git a/neko/hardware-configuration.nix b/neko/hardware-configuration.nix
index 86705cb..567654b 100644
--- a/neko/hardware-configuration.nix
+++ b/neko/hardware-configuration.nix
@@ -22,14 +22,17 @@
   boot.initrd.luks.devices."crypt0" = {
     device = "/dev/disk/by-id/nvme-Seagate_FireCuda_530_ZP4000GM30013_7VS01VBM-part2";
     allowDiscards = true;
+    bypassWorkqueues = true;
   };
   boot.initrd.luks.devices."crypt1" = {
     device = "/dev/disk/by-id/nvme-CT2000P5PSSD8_213330E4ED05";
     allowDiscards = true;
+    bypassWorkqueues = true;
   };
   boot.initrd.luks.devices."crypt2" = {
     device = "/dev/disk/by-id/nvme-Samsung_SSD_980_PRO_2TB_S69ENF0R846614L";
     allowDiscards = true;
+    bypassWorkqueues = true;
   };
   fileSystems."/nix" =
     { device = "/dev/mapper/crypt0";
-- 
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