Comment 20 for bug 1982727

   - or run "sudo sysctl -w kernel.task_delayacct=1"
   - then you'll be in (B) and it works

Tested just to confirm: this does work but it doesn't _seem_ to work straight away (because there's a delay I guess).

If you need this you can add a drop-in to your /etc/systctl.d/.

Thanks, Christian!