On Mon, Oct 20, 2014 at 07:07:05PM +0200, Lennart Poettering wrote: > On Mon, 20.10.14 11:02, David Herrmann (dh.herrm...@gmail.com) wrote: > > > >> >> I want to rely on systemd --user to handle PulseAudio's activation > > >> >> (ditching the built in stuff) and but I'm worried that e.g. GNOME or > > >> >> KDE > > >> >> might start up their own session stuff and spawn some PA consuming > > >> >> process before systemd --user has reached it's sockets.target and is > > >> >> thus ready and listening on PA's native socket. > > >> >> > > >> >> Doesn't seem to be a problem on my machine here (it's working really > > >> >> nicely actually!) but figured I should ask here too. > > >> > > > >> > Ordering of user units is (see /usr/lib/systemd/user/): > > >> > default.target after basic.target after sockets.target > > >> > > > >> > PAM creates sessions by calling into systemd's pam-module, which then > > >> > uses CreateSession() (internal api!). This call does not return until > > >> > the job of user@.service is done. `systemd --user` notifies READY=1 > > >> > only after "default.target" is ready. > > > Hm, this seems a bit excessive, because default.target can take > > > a while. basic.target would seem more natural. > > > > No idea what the semantics here are. I mean the important fact is that > > we block on _some_ target so you can order stuff before the PAM call > > returns. Which target this is, I don't really care. But I don't think > > we ever defined how the semantics for user-sessions are, anyway. > > > > Btw., manager_check_finished() doesn't explicitly wait for > > default.target, but instead waits for all jobs to be done. Not sure > > why.. Anyway, this means any dynamically scheduled jobs will also > > contribute to this delay. > > Hmm, this actually appears broken the way it currently is > implemented... We probably should really move sd_notify() earlier than > just becoming idle. Long running cron-like jobs might really break > things here. > > I figure we should go for Zbigniew's suggestion to only wait for > basic.target. Zbigniew? Yeah.
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