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Re: containers and cgroups mini-summit @ Linux Plumbers [message #47292 is a reply to message #47282] Thu, 26 July 2012 18:09 Go to previous messageGo to previous message
Serge E. Hallyn is currently offline  Serge E. Hallyn
Messages: 26
Registered: February 2011
Junior Member
Quoting Eric W. Biederman (ebiederm@xmission.com):
> Glauber Costa <glommer@parallels.com> writes:
>
> > I just came up with the following preliminary list of sessions:
> >
> > http://wiki.linuxplumbersconf.org/2012:containers
> >
> > Since people mostly said what they wanted to talk about, but without
> > extensive descriptions, I took the liberty of coming up with a small
> > text for each in the blueprints. If you believe this is inaccurate, or
> > would like to see it extended (although I personally don't see the point
> > about going into very formal and deep details here), just let me know
> > and I will edit it.
> >
> > This is all still subject to change.
>
> Something that just came up recently and worth looking at if it hasn't
> already be resolved.
>
> The network namespace, the user namespace, and the memory control group
> are not meshing well.
>
> In particular we need some additional checks for an unprivileged user
> who can set tcp_mem. If you are the creator of a network namespace you
> should at least be able to set the values down. I don't know at all
> about increasing the amount of memory consumed by the tcp stack.
>
> The non-nesting nature of memory control groups with respect to the
> network stack also seems very bizarre.
>
>
> Another old issue is that unless I have missed something control groups
> are still broken for generic use in containers. Does anyone care?
> Are there any plans on fixing this issue?

Can you elaborate? Which specific breakages are you thinking of?

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