Re: what's next for the linux kernel?

[Nix <nix@esperi.org.uk>]

On Wed, 5 Oct 2005, David Leimbach said:
>> 1) make namespaces joinable in a sane way
>> 2) wait for the shared subtree patch
>> 3) make pam join the per-user-namespace
>> 4) make pam automount tmpfs on the private /tmp
> 
> I'm not sure what you mean by a joinable namespace.  I also am not
> sure I want them :-).

They are namespaces which processes can join. Right now you can do
it by chrooting into /proc/{pid}/root, but this is, as Bodo said,
not a very sane API.

Without this, a user starting two sessions gets two namespaces,
which is profoundly counterintuitive from the user's POV.

> I think of namespaces as being fundamental to the process model and
> that they are inherited from the parent and new ones are created in a
> sort of COW fashion [or at least have similar behavior].

Yes, but you can change them too (that's what e.g. mount() is for!)

> You might want a session namespace instead of a joinable per-process
> namespace but I think that might be a slightly different point of
> view.

I think that's the idea; a filesystem holding namespaces that you're
allowed to chroot() into.

-- 
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