Messages in this thread | | | Date | Wed, 17 Nov 2010 23:45:47 +0100 | From | Lennart Poettering <> | Subject | Re: [RFC/RFT PATCH v3] sched: automated per tty task groups |
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On Wed, 17.11.10 23:37, Peter Zijlstra (a.p.zijlstra@chello.nl) wrote:
> > On Wed, 2010-11-17 at 23:34 +0100, Lennart Poettering wrote: > > > > This should fix things for people with systemd and GNOME. Yes, all > > others are left in the cold. Sorry for that. > > Is there an easy opt out for that, other than booting a CONFIG_CGROUP=n > kernel?
systemd relies on CONFIG_CGROUP=y, since it useses it for service management. It creates its own name=systemd hierarchy for that with no controllers attached. If you turn that off, then systemd will refuse to boot. However, it does not rely on any of the controllers, and hence you are welcome to disable all cgroup controlls and systemd won't complain.
If you want to disable the automatic creation of groups in the 'cpu' hierarchy for user sessions then you can tell pam_systemd that by passing "controllers=" on the PAM config line. ("controllers=cpu" is the implied default.)
There's currently no global option to disable the same logic in systemd when it creates 'cpu' cgroups for the various services it runs. However, you can disable that individually with "ControlGroups=cpu:/" in the .service files. I will now add a global option as well.
Lennart
-- Lennart Poettering - Red Hat, Inc.
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