For this as well as for the one you posted about the /proc/.../comm changes the process is the same.

You have to wait if there is other feedback and then until one with libvirt commit rights picks it up.

It is helpful if you can identify a certain (sub-)maintainer for the files and cc him.

There is no maintainers file that guides you in this case, but usually git log on a certain dir can give you an idea who to cc.

Given that you come from a Debian point of view if I read mails correctly you might want to add "Guido Günther <agx@sigxcpu.org>" for example.

Other than that it is down to waiting and sometimes pinging for response.