Hi, On Wed, Nov 26, 2014 at 10:29 PM, Richard Weinberger <richard@xxxxxx> wrote: > Hi! > > I run a Linux container setup with openSUSE 13.1/2 as guest distro. > After some time containers slow down. > An investigation showed that the containers slow down because a lot of stale > user sessions slow down almost all systemd tools, mostly systemctl. > loginctl reports many thousand sessions. > All in state "closing". > > The vast majority of these sessions are from crond an ssh logins. > It turned out that sessions are never closed and stay around. > The control group of a said session contains zero tasks. > So I started to explore why systemd keeps it. > After another few hours of debugging I realized that systemd never > issues the release signal from cgroups. > Also calling the release agent by hand did not help. i.e. > /usr/lib/systemd/systemd-cgroups-agent /user.slice/user-0.slice/session-c324.scope > > Therefore systemd never recognizes that a server/session has no more tasks > and will close it. > First I thought it is an issue in libvirt combined with user namespaces. > But I can trigger this also without user namespaces and also with systemd-nspawn. > Tested with systemd 208 and 210 from openSUSE, their packages have all known bugfixes. > > Any idea where to look further? > How do you run the most current systemd on your distro? > I think they are same: http://lists.freedesktop.org/archives/systemd-devel/2014-October/024482.html https://bugs.freedesktop.org/show_bug.cgi?id=86520 Umut > Thanks, > //richard > _______________________________________________ > systemd-devel mailing list > systemd-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list