Install Mainline Kernel on AlmaLinux / RockyLinux 9

If you would like to use the latest mainline Linux kernel (for improved hardware compatibility, or performance, or any other reason), this is the process to do it.

Caution - This KB article may have issues. See details at the bottom.

Configure via Shell

dnf config-manager --set-enabled crb
dnf install epel-release elrepo-release
dnf --enablerepo=elrepo-kernel install kernel-ml

Configure via Ansible

- name: Install mainline kernel
  hosts: all
  
  tasks:
    - name: Ensure the crb repository is enabled
      community.general.dnf_config_manager:
        name: crb
        state: enabled
    - name: Enable EPEL
      ansible.builtin.dnf:
        name: epel-release
    - name: Enable ELRepo
      ansible.builtin.dnf:
        name: elrepo-release
    - name: Install mainline kernel
      ansible.builtin.dnf:
        name: kernel-ml
        enablerepo: elrepo-kernel
        state: latest

Issues

When a normal dnf upgrade runs, if the OS kernel is updated then the system will revert to the shipped 5.15 kernel instead of the mainline kernel. Still working on troubleshooting this. If you know how to resolve it, reach out. Thanks!