[Devel] Re: lxc-start: Device or resource busy - failed to remove previous cgroup

[Serge E. Hallyn]

Quoting Dwight Schauer (dschauer at gmail.com):
> On Mon, Jan 4, 2010 at 4:40 AM, Daniel Lezcano <daniel.lezcano at free.fr> wrote:
> > Did you check the file /cgroup/<name>/tasks is empty ? it's probably a dumb
> > question, but just in case :)
> >
> 
> Ok, since this is easy enough to reproduce, I got it into this state again.
> 
> $ cat /cgroup/arch64-1/tasks
> $
> 
> it is empty

And there are no subdirectories?  What does the output of
	ls -laFZ /cgroup/arch64-1 look like?

> > Can you give the content of cat /proc/slabinfo  | grep namespace ? Does the
> > number of objects reach zero ? (assuming you have just one container).
> >
> 
> cat /proc/slabinfo  | grep namespace
> pid_namespace          4      6   2112    3    2 : tunables   24   12
>   8 : slabdata      2      2      0
> net_namespace          0      0   1984    2    1 : tunables   24   12
>   8 : slabdata      0      0      0
> 
> I have two containers, but only one was started and stopped this session.
> 
> > Maybe I am missing something, but I suspect a bug in the kernel. Can you
> > check if that happens with a more recent kernel ?
> 
> Ok, yes, I'll do that.
> 
> Dwight
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