(In reply to Michael Biebl from comment #1)
> ExecStop=/bin/true was my first idea, but Martin rightfully pointed out,
> that this doesn't influence KillMode, i.e. we need KillMode=none.
> With that KillMode setting, I think we can actually drop ExecStop=/bin/true,
> so what remains is
>
> KillMode=none
This doesn't actually work in my tests, the ExecStop= is needed (tested with systemd 219).
I was quite surprised that this fixed a lot more than just the hangs on unmounting network file systems. I also got reports that other vague shutdown hangs now disappeared (https://launchpad.net/bugs/1427672) and that shutdown hangs with libvirt's virbr0-nic interfaces are now gone as well.
(In reply to Michael Biebl from comment #1)
> ExecStop=/bin/true was my first idea, but Martin rightfully pointed out,
> that this doesn't influence KillMode, i.e. we need KillMode=none.
> With that KillMode setting, I think we can actually drop ExecStop=/bin/true,
> so what remains is
>
> KillMode=none
This doesn't actually work in my tests, the ExecStop= is needed (tested with systemd 219).
I was quite surprised that this fixed a lot more than just the hangs on unmounting network file systems. I also got reports that other vague shutdown hangs now disappeared (https:/ /launchpad. net/bugs/ 1427672) and that shutdown hangs with libvirt's virbr0-nic interfaces are now gone as well.