On Wed, 08 Jun 2016, Dan Purgert wrote: > This was in the comments of the article on lwn (sorry, I forget who > linked it on the mailing list). I'm honestly not sure how "true" it is, > but it seems to coincide with what else I've been reading. > > 1. In the beginning there was there login. Every process started after > login was a child of it, the kernel used a very simple process to track > those children and so it was easy to clean up on logout. > > 2. Then X and xdm replaced login, but every process was a child of xdm, > and cleaning up on logout remained simple. > > 3. Then there was GNOME, and gdm, and later gdm spawned corba. Things > were rapidly getting more complex, but nonetheless everything was a > process child of gdm and so cleaning up on logout was till simple. > > 4. GNOME moves to dbus. > > 5. systemd takes over dbus. > > 6. systemd takes over session management - primarily via logind. > > 7. GNOME immediately adopts logind, causing much angst on Debian because > it meant the default desktop required you to use systemd. > > 8. GNOME starts uses dbus to lazily start services. > > 9. systemd starts dbus under a separate process tree (the one under > systemd --user, as opposed to the one started by gdm). > > 10. GNOME notices if the user logs in twice, they start services such as > the evolution-address-book twice. Seems inefficient. They share services > between two login sessions. For some services. > > 11. Consequently keeping track of what session owns what process becomes > hard. Some things aren't killed properly when the sessions logout. Since > logind is tracking the sessions, seems like a good idea to make it the > systemd mob's problem. KillUserProcesses is implemented, and GNOME's > problem is solved. > > 12. But no one is turning KillUserProcess on so GNOME sessions are still > leaving services running. So systemd-230 changes it to default to be on.
And some news: 13. Debian removes logind's 'KillUserProcesses' by default *at build* https://anonscm.debian.org/cgit/pkg-systemd/systemd.git/commit/?id=c11c9a4601ec0dbfb8a64e2c1c0309a590ab838b So if the above is true then GNOME will leave services running? ciao _______________________________________________ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
