Re: [RFC/RFT PATCH v3] sched: automated per tty task groups

[Stephen Clark]

On 11/17/2010 05:52 PM, Peter Zijlstra wrote:
> On Wed, 2010-11-17 at 23:45 +0100, Lennart Poettering wrote:
>    
> > On Wed, 17.11.10 23:37, Peter Zijlstra (a.p.zijlstra@xxxxxxxxx) 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.
> >      
> Do expect distro bugzilla entries when this 'awesome'-ness hits the
> street.
>
>    
> >   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.
> >      
> A global knob is a must -- preferably with neon signs on so I can find
> it.  Luckily I don't use this GNOME junk, otherwise I'd have had to ask
> how to revert that crap as well.
>
>
>    
Amen!!



--

"They that give up essential liberty to obtain temporary safety,
deserve neither liberty nor safety."  (Ben Franklin)

"The course of history shows that as a government grows, liberty
decreases."  (Thomas Jefferson)



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