[Lxc-users] [PATCH 2/2] cgroups: support cgroups mounted in multiple places

[Michael H. Warfield]

On Sat, 2011-06-25 at 20:05 +0200, Daniel Lezcano wrote: 
> On 06/24/2011 07:54 PM, Serge Hallyn wrote:
> > I.e. with systemd or libcgroup.
> >
> > To do this, instead of looking for one cgroup called 'lxc' or
> > otherwise taking the first cgroup we find, we actually create a
> > container in every mounted cgroup fs.  Right now it's done under the
> > root of each fs.  We may want to put that under lxc, or, better yet,
> > make that configurable.
> >
> > Note the use of clone_children seems not quite right, but that's
> > not for this patch to fix.  In particular, if clone_children is
> > not in the mntopts, we reject it.  Yet later we try to set it
> > ourselves.  I believe we should simply, if ns cgroup is not
> > composed, always try to set clone_children to 1.  As it stands,
> > with libcgroup installed, I had to do
> >
> >    cd /sys/fs/cgroup
> >    for d in `/bin/ls`; do
> >       echo 1 > $d/cgroup.clone_children
> >    done
> >
> > But after that, 'lxc-start -n l1' worked like a charm.  It also
> > continues to work with a single mount of cgroups under /cgroup.
> >
> > Signed-off-by: Serge Hallyn <serge.hallyn at ubuntu.com>
> > ---
> 
> Ok, I installed f15 on a kvm machine. But WTF are all these daemons !!
> 
> 1 root      20   0 48232  15m 1772 R 66.1  1.5   4:53.82
> systemd              
> 19247 dlezcano  20   0  790m  40m  11m R 62.2  4.0   0:46.93
> gnome-settings-      
> 19255 root      20   0  104m  27m 3252 R 35.9  2.8   0:44.83
> packagekitd          
> 1173 root      20   0  196m  65m 2416 R 30.6  6.5   2:43.70
> udisks-daemon        
> 
> ... eating all the cpu and making impossible to use the fedora ?

Don't get me started, yeah...

systemd and udisks-daemon should not be consuming that much cpu.  That
is weird.

Gnome-settings and packagekitd, I don't know.  Why do we need a bloody
daemon to check for packages and updates?  I just don't know.

OTOH...  I'm not experiencing that on Forest (my hard-iron F15 host
engine).  My load average is staying low.  So I'm not sure what's going
on for your.


> systemd is looking all the time at /proc/1/mountinfo and reading the
> content, nice for an init process ! And tomorrow the init process will
> be firefox ...

Hmmm...  Something fishy there for sure.

Regards,
Mike
-- 
Michael H. Warfield (AI4NB) | (770) 985-6132 |  mhw at WittsEnd.com
   /\/\|=mhw=|\/\/          | (678) 463-0932 |  http://www.wittsend.com/mhw/
   NIC whois: MHW9          | An optimist believes we live in the best of all
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