From 6416e75475d26cf550f71a3370c22b0f0d53ddd3 Mon Sep 17 00:00:00 2001
From: Linus Karl <linus@lotz.li>
Date: Wed, 25 Mar 2026 13:57:18 +0100
Subject: [PATCH 1/2] linuxKernel.kernels.linux_zen: fix update script Also
 remove leftover '# zen' comment from #499218

---
 pkgs/os-specific/linux/kernel/update-zen.py   | 16 ++++++++--------
 pkgs/os-specific/linux/kernel/zen-kernels.nix |  2 +-
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/pkgs/os-specific/linux/kernel/update-zen.py b/pkgs/os-specific/linux/kernel/update-zen.py
index 9b852b164b99..cf33df902057 100755
--- a/pkgs/os-specific/linux/kernel/update-zen.py
+++ b/pkgs/os-specific/linux/kernel/update-zen.py
@@ -64,24 +64,24 @@ def update_file(relpath, version, suffix, sha256):
         for line in f:
             result = line
             result = re.sub(
-                fr'^  version = ".+";',
-                f'  version = "{version}";',
+                r'^(\s*)version = ".+";',
+                fr'\1version = "{version}";',
                 result)
             result = re.sub(
-                fr'^  suffix = ".+";',
-                f'  suffix = "{suffix}";',
+                r'^(\s*)suffix = ".+";',
+                fr'\1suffix = "{suffix}";',
                 result)
             result = re.sub(
-                fr'^    sha256 = ".+";',
-                f'    sha256 = "{sha256}";',
+                r'^(\s*)sha256 = ".+";',
+                fr'\1sha256 = "{sha256}";',
                 result)
             print(result, end='')
 
 
 def read_file(relpath):
     file_path = os.path.join(DIR, relpath)
-    re_version = re.compile(fr'^\s*version = "(.+)";')
-    re_suffix = re.compile(fr'^\s*suffix = "(.+)";')
+    re_version = re.compile(r'^\s*version = "(.+)";')
+    re_suffix = re.compile(r'^\s*suffix = "(.+)";')
     version = None
     suffix = None
     with fileinput.FileInput(file_path, mode='r') as f:
diff --git a/pkgs/os-specific/linux/kernel/zen-kernels.nix b/pkgs/os-specific/linux/kernel/zen-kernels.nix
index a403b0be58b0..54cef6142e23 100644
--- a/pkgs/os-specific/linux/kernel/zen-kernels.nix
+++ b/pkgs/os-specific/linux/kernel/zen-kernels.nix
@@ -12,7 +12,7 @@ let
   # override options if they need using lib.mkForce (that has 50 priority)
   mkKernelOverride = lib.mkOverride 90;
 
-  suffix = "zen1"; # zen
+  suffix = "zen1";
 in
 
 buildLinux (

From 4ceb3f35581a8ed908a21284105617d32ac59505 Mon Sep 17 00:00:00 2001
From: Linus Karl <linus@lotz.li>
Date: Wed, 25 Mar 2026 14:00:25 +0100
Subject: [PATCH 2/2] linuxKernel.kernels.linux_zen: 6.18.13-zen1 ->
 6.19.9-zen1

Added PREEMPT_LAZY=n to make the config work
---
 pkgs/os-specific/linux/kernel/zen-kernels.nix | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pkgs/os-specific/linux/kernel/zen-kernels.nix b/pkgs/os-specific/linux/kernel/zen-kernels.nix
index 54cef6142e23..79d2f3a5c700 100644
--- a/pkgs/os-specific/linux/kernel/zen-kernels.nix
+++ b/pkgs/os-specific/linux/kernel/zen-kernels.nix
@@ -18,7 +18,7 @@ in
 buildLinux (
   args
   // rec {
-    version = "6.18.13";
+    version = "6.19.9";
     pname = "linux-zen";
     modDirVersion = lib.versions.pad 3 "${version}-${suffix}";
     isZen = true;
@@ -27,7 +27,7 @@ buildLinux (
       owner = "zen-kernel";
       repo = "zen-kernel";
       rev = "v${version}-${suffix}";
-      sha256 = "0x6s3pa7c6zlvr3w2fv6i15v54cy1pschvgk7b4vrzx1bcrjdxf7";
+      sha256 = "09wlnd8ndm4r75ywk2sanmkc0v788rz9faa61hcfschw5pq5yzx6";
     };
 
     # This is based on the following source:
@@ -46,6 +46,7 @@ buildLinux (
       # Preempt (low-latency)
       PREEMPT = mkKernelOverride yes;
       PREEMPT_VOLUNTARY = mkKernelOverride no;
+      PREEMPT_LAZY = mkKernelOverride no;
 
       # Preemptible tree-based hierarchical RCU
       TREE_RCU = yes;