[Lxc-users] unstoppable container

[Serge E. Hallyn]

Quoting Daniel Lezcano (daniel.lezcano at free.fr):
> On 08/30/2010 02:36 PM, Serge E. Hallyn wrote:
> >Quoting Papp Tamás (tompos at martos.bme.hu):
> >>Daniel Lezcano wrote, On 2010. 08. 30. 13:08:
> >>>Usually, there is a mechanism used in lxc to kill -9 the process 1 of
> >>>the container (which wipes out all the processes of the containers)
> >>>when lxc-start dies.
> >>It should wipe out them, but in my case it was unsuccessfull, even if I
> >>killed the init process by hand.
> >>
> >>>So if you still have the processes running inside the container but
> >>>lxc-start is dead, then:
> >>>   * you are using a 2.6.32 kernel which is buggy (this mechanism is
> >>>broken).
> >>Ubuntu 10.04, so it's exactly the point, the kernel is 2.6.32 .
> >>
> >>
> >>Could you point me (or the Ubuntu guy in the list) to an URL, which
> >>describes the problem or maybe to the kernel patch. If it's possible,
> >>maybe the Ubuntu kernel maintainers would fix the official Ubuntu kernel.
> >Daniel,
> >
> >which patch are you talking about?  (presumably a patch against
> >zap_pid_ns_processes()?)  If it's keeping containers from properly
> >shutting down, we may be able to SRU a small enough patch, but if
> >it involves a whole Oleg rewrite then maybe not :)
> 
> I am referring to these ones:
> 
> http://git.kernel.org/?p=linux/kernel/git/next/linux-next.git;a=commit;h=13aa9a6b0f2371d2ce0de57c2ede62ab7a787157
> http://git.kernel.org/?p=linux/kernel/git/next/linux-next.git;a=commit;h=dd34200adc01c5217ef09b55905b5c2312d65535
> http://git.kernel.org/?p=linux/kernel/git/next/linux-next.git;a=commit;h=dd34200adc01c5217ef09b55905b5c2312d65535

(note, second and third are identical - did you mean to paste 2 or 3 links?

> Are they small enough for a SRU ?

The first one looks trivial enough.  I'd be afraid the second one would be
considered to have deep and subtle regression potential.  But, we can
always try.  I'm not on the kernel team so am not likely to have any say
on it myself :)

-serge