Comment 7 for bug 2046470

Turns out the actual new behavior is in the logging.

The old was ultra-silent

Mantic:
root@m-vm:~# journalctl -u irqbalance -f
Jan 05 12:28:00 m-vm systemd[1]: Started irqbalance.service - irqbalance daemon.

Nothing more will come out of it.

Now then there was this upstream change:

https://github.com/Irqbalance/irqbalance/commit/75a15c5dbe6b3a1fd50569b94359d22ae4116285

But it not only set foreground automatically.
It also set journal_logging=1

If I go to mantic I can get the very same:
$ echo 'IRQBALANCE_ARGS="--journal"' >> /etc/default/irqbalance
$ systemctl restart irqbalance
$ journalctl -u irqbalance -f
...
Jan 05 12:37:42 m-vm irqbalance[1575]:

                                       -----------------------------------------------------------------------------

So the actual change is that it now logs to journal (good) and due to that this 10 second break line is there (bad).