[Devel] Re: [PATCH 0/13] Pid namespaces (OpenVZ view)

[Eric W. Biederman]

"Serge E. Hallyn" <serue at us.ibm.com> writes:

>> 3. Cleaner logic for namespace migration: with this approach
>>    one need to save the virtual pid and let global one change;
>>    with Suka's logic this is not clear how to migrate the level
>>    2 namespace (concerning init to be level 0).
>
> This is a very good point.
>
> How *would* we migrate the pids at the second level?

As long as you don't try and restore pids into the initial pid namespace
it isn't a problem.  You just record the pid hierarchy and the pid
for a task in that hierarchy.  There really is nothing special going on
that should make migration hard.

Or did I miss something?

Eric