You can manually move processes from one scheduling class to another scheduling class without changing the default scheduling class and rebooting. This procedure shows how to manually move processes from the TS scheduling class into the FSS scheduling class.
Become superuser or assume an equivalent role.
Move the init process (pid 1) into the FSS scheduling class.
# priocntl -s -c FSS -i pid 1 |
Move all processes from the TS scheduling class into the FSS scheduling class.
# priocntl -s -c FSS -i class TS |
All processes again run in the TS scheduling class after reboot.