CachyOS COPR Repository for Fedora

Goodies from CachyOS ported to Fedora.

This repository is maintained by @1Naim, @andersrh and @TrixieUA.

• List of Packages We Provide
  • kernel-cachyos & kernel-cachyos-lts
  • Addons
    • CachyOS-Settings
    • scx-scheds
    • uksmd
    • ananicy-cpp

List of Packages We Provide

kernel-cachyos & kernel-cachyos-lts

A port of the default linux-cachyos and LTS linux-cachyos-lts kernels for Fedora.

⤵️ Features

• Choose between GCC and LLVM-ThinLTO
• Optimized for x86-64v3 CPUs for kernel-cachyos and x86-64v2 for kernel-cachyos-lts
• BORE scheduler with sched-ext support (sched-ext support only for kernel-cachyos)
• AMD P-State Preferred Core, AMD CPB Switch and upstream amd-pstate enchancements (exclusive to kernel-cachyos)
• Cachy Sauce - Provides tweaks for the scheduler and other settings
• Prebuilt nvidia-open kernel modules
• Latest & improved ZSTD patchset
• Improved BFQ Scheduler
• BBRv3 tcp_congestion_control
• v4l2loopback modules as default included
• Cherry picked patches from Clear Linux
• Backported patches from linux-next
• OpenRGB and ACS Override support
• NTSync patched and integrated into the kernel (exclusive to kernel-cachyos)

Installation Instructions

Make sure your CPU supports the higher target x86-64 architectures.

/lib64/ld-linux-x86-64.so.2 --help | grep "(supported, searched)"

Next, enable the COPR repository hosting the kernels.

sudo dnf copr enable bieszczaders/kernel-cachyos # For GCC built kernels
# or
sudo dnf copr enable bieszczaders/kernel-cachyos-lto # For LLVM-ThinLTO build kernels

Now you can install the kernels

sudo dnf install kernel-cachyos kernel-cachyos-devel-matched # For GCC built kernels
# or
sudo dnf install kernel-cachyos-lto kernel-cachyos-lto-devel-matched # For LLVM-ThinLTO built kernels

## LTS Kernel
sudo dnf install kernel-cachyos-lts kernel-cachyos-lts-devel-matched
# or
sudo dnf install kernel-cachyos-lts-lto kernel-cachyos-lts-lto-devel-matched

Lastly if you use SELinux, you need to enable the necessary policy to be able to load kernel modules.

sudo setsebool -P domain_kernel_load_modules on

Fedora Silverblue

cd /etc/yum.repos.d/
sudo wget https://copr.fedorainfracloud.org/coprs/bieszczaders/kernel-cachyos/repo/fedora-$(rpm -E %fedora)/bieszczaders-kernel-cachyos-fedora-$(rpm -E %fedora).repo
sudo rpm-ostree override remove kernel kernel-core kernel-modules kernel-modules-core kernel-modules-extra --install kernel-cachyos
sudo systemctl reboot

Addons

We provide a few addons that supplement the kernel packages and system.

• CachyOS-Settings - Settings used in CachyOS (includes modprobe config, udev rules, etc) packaged for Fedora.
• scx-scheds - sched-ext schedulers. Provides both scx-scheds releases and scx-scheds-git package.
• uksmd - Userspace KSM helper daemon.
• ananicy-cpp & cachyos-ananicy-rules - Auto nice daemon with rules support.

Installation instructions

First, enable the COPR repository hosting addon packages.

sudo dnf copr enable bieszczaders/kernel-cachyos-addons

Now you can install the addon packages.

CachyOS-Settings

sudo dnf install cachyos-settings
sudo dracut -f

scx-scheds

sudo dnf install scx-scheds
#or
sudo dnf install scx-scheds-git # For -git package

# Choose which scx scheduler to use by editting `/etc/default/scx`
sudo nano /etc/default/scx

# Then enable the systemd service to make it persistent across boots
sudo systemctl enable --now scx.service

uksmd

sudo dnf install uksmd
sudo systemctl enable --now uksmd.service

ananicy-cpp

sudo dnf install ananicy-cpp
sudo systemctl enable --now ananicy-cpp