Comment # 61 on bug 1165780 from Fabian Vogt

(In reply to Franck Bui from comment #59)
> (In reply to Goldwyn Rodrigues from comment #55)
> > How about enabling and starting the timer service only if
> > /etc/systemd/system/$SERVICE.timer.d/schedule.conf does not match the
> > $PERIOD in /etc/sysconfig/btrfsmaintenance? Would that solve the issue?
> 
> I think we already discussed about what is actually needed:
> 
>  1. btrfsmaintenance-refresh.service should not be enabled by default by the
>     preset stuff but instead it should enable btrfsmaintenance-refresh.path
>     On Factory this was dealt by sr#829721
> 
>  2. since btrfsmaintenance-refresh.service is not supposed to be run at boot
>     the unit file should have an [Install] section. Not sure if this was
>     fixed...

It was part of https://build.opensuse.org/request/show/831373.

> IIRC this was based on the fact that btrfsmaintenance-refresh.service needs
> to be started only when settings were changed in
> /etc/sysconfig/btrfsmaintenance.
> 
> But please note that this addresses new installations only.
> 
> For existing systems, the relevant symlink have to be changed manually
> because the presets stuff are only apply at installation time.

Change 2 is enough and also affects existing installations properly,
see comment 48.

> Ideally after an update we should have renamed
> /etc/systemd/system/multi-user.target.wants/btrfsmaintenance-refresh.service
> to point to btrfsmaintenance-refresh.path instead.
> 
> AFAICS none of these changes has not been backported to *SLE*.

Backporting only sr#829721 should be sufficient.