btrfs flags added to kernel install

files/scripts/cachyos-kernel.sh

@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+# Replaces the stock Fedora kernel with the CachyOS LTO kernel.
+# CachyOS LTO kernel is compiled with Link-Time Optimization and ships
+# sched-ext (SCX) support, giving lower latency for realtime audio workloads.
+#
+# Adapted from the Zena project (https://github.com/zena-linux/zena),
+# specifically build-scripts/modules/base/kernel.sh.
+# Zena is licensed under the Apache License 2.0.
+# Credit to the Zena contributors: https://github.com/zena-linux/zena/graphs/contributors
+
+set -ouex pipefail
+
+shopt -s nullglob
+
+KERNEL_PACKAGES=(
+  kernel-cachyos-lto
+  kernel-cachyos-lto-core
+  kernel-cachyos-lto-devel-matched
+  kernel-cachyos-lto-modules
+)
+
+# Disable kernel-install hooks so they don't trigger inside the container
+# build environment. The initramfs will be generated explicitly below.
+pushd /usr/lib/kernel/install.d
+printf '%s\n' '#!/bin/sh' 'exit 0' >05-rpmostree.install
+printf '%s\n' '#!/bin/sh' 'exit 0' >50-dracut.install
+chmod +x 05-rpmostree.install 50-dracut.install
+popd
+
+# Erase stock Fedora kernel RPMs from the package database
+for pkg in kernel kernel-core kernel-modules kernel-modules-core; do
+  rpm --erase "$pkg" --nodeps || true
+done
+
+# Remove ALL existing kernel module directories. The original script used
+# `head -n1` which only removed the first entry — on Kinoite's base image
+# there are typically two kernel versions, leaving an orphaned module
+# directory that confuses rpm-ostree/bootc at deploy time.
+for KVER in $(ls /usr/lib/modules 2>/dev/null); do
+  rm -rf "/usr/lib/modules/$KVER"
+done
+
+dnf5 -y install "${KERNEL_PACKAGES[@]}"
+
+dnf5 versionlock add "${KERNEL_PACKAGES[@]}" || true
+
+# Identify the newly installed CachyOS kernel version
+NEW_KVER=$(ls /usr/lib/modules | head -n1)
+
+# Ensure vmlinuz is at the path expected by rpm-ostree and bootc for boot
+# entry generation. Some COPR kernel RPMs only install vmlinuz to /boot and
+# not to /usr/lib/modules/<kver>/vmlinuz; copy it over if missing.
+if [ ! -f "/usr/lib/modules/${NEW_KVER}/vmlinuz" ]; then
+  if [ -f "/boot/vmlinuz-${NEW_KVER}" ]; then
+    cp "/boot/vmlinuz-${NEW_KVER}" "/usr/lib/modules/${NEW_KVER}/vmlinuz"
+  else
+    echo "ERROR: vmlinuz not found for kernel ${NEW_KVER}" >&2
+    exit 1
+  fi
+fi
+
+# Generate the initramfs inside the container image so that rpm-ostree and
+# bootc can use it directly at deploy time. Without this step, Kinoite boots
+# with no initramfs and hits a dracut emergency shell (the "wall of errors").
+#   --no-hostonly : include all drivers, not just the CI build host's hardware
+#   --add ostree  : include the ostree dracut module for atomic deployments
+dracut \
+  --reproducible \
+  --no-hostonly \
+  --add "ostree" \
+  --filesystems "btrfs" \
+  --add-drivers "btrfs" \
+  --force \
+  "/usr/lib/modules/${NEW_KVER}/initrd" \
+  "${NEW_KVER}"
+
+# Atomic images manage /boot via the bootloader layer; clear any kernel
+# files the RPM dropped there.
+rm -rf /boot/*

recipes/common/copr-packages.yml

@@ -2,6 +2,8 @@ modules:
   - type: dnf
     repos:
       copr:
+        - bieszczaders/kernel-cachyos-lto
+        - bieszczaders/kernel-cachyos-addons
         - patrickl/wine-tkg
         - timlau/audio
         - alternateved/eza

recipes/common/fedora-packages.yml

@@ -1,7 +1,23 @@
 modules:
+  - type: dnf
+    remove:
+      packages:
+        - zram-generator-defaults
+
   - type: dnf
     install:
       packages:
+        # CachyOS kernel performance companion packages
+        # cachyos-settings: kernel tunables and sysctl optimisations from CachyOS
+        # cachyos-ksm-settings: Kernel Samepage Merging tuning (reduces RAM usage)
+        # scx-manager / scx-scheds / scx-tools: sched-ext schedulers;
+        #   scx_lavd is ideal for low-latency realtime audio workloads
+        - cachyos-settings
+        - cachyos-ksm-settings
+        - scx-manager
+        - scx-scheds-git
+        - scx-tools-git
+
         # useful tools
         - zsh
         - openssl
@@ -12,7 +28,6 @@ modules:
         - alacritty
         - ripgrep
         - fd-find
-        - realtime-setup
         - zoxide
         - fzf
 

recipes/recipe.yml

@@ -3,13 +3,25 @@
 # image will be published to ghcr.io/<user>/<name>
 name: miasma-os
 # description will be included in the image's metadata
-description: An personal spin based on Bazzite targeted towards musicians and music producers inspired by Fedora Jam
+description: An KDE based Universal Blue image targeted towards musicians and music producers inspired by Fedora Jam
 
 # the base image to build on top of (FROM) and the version tag to use
-base-image: ghcr.io/ublue-os/bazzite
-image-version: latest # latest is also supported if you want new updates ASAP
+base-image: quay.io/fedora-ostree-desktops/kinoite
+image-version: 43
 
 modules:
+  # Add CachyOS repos first so the kernel swap script can use them
+  - type: dnf
+    repos:
+      copr:
+        - bieszczaders/kernel-cachyos-lto
+        - bieszczaders/kernel-cachyos-addons
+
+  # Swap stock Fedora kernel for CachyOS LTO kernel
+  - type: script
+    scripts:
+      - cachyos-kernel.sh
+
   - type: dnf
     install:
       packages: