openstack-ansible-os_nova/tasks/drivers/kvm/nova_enable_ksm.yml

---
- name: Enable ksm systemd service
  service:
    name: ksm
    enabled: yes
    state: started

- name: Enable ksmtuned systemd service
  service:
    name: ksmtuned
    enabled: yes
    state: started
  when:
    - ansible_pkg_mgr in ['yum', 'dnf', 'apt']