Re: [RFC 1/5] user namespaces: Add a user_namespace as creator/owner of uts_namespace

[Serge Hallyn <serge.hallyn@canonical.com>]

Quoting Alexey Dobriyan (adobriyan@gmail.com):
> On Fri, Dec 17, 2010 at 5:56 PM, Alexey Dobriyan <adobriyan@gmail.com> wrote:
> > On Fri, Dec 17, 2010 at 5:24 PM, Serge E. Hallyn <serge@hallyn.com> wrote:
> >> +/*
> >> + * userns count is 1 for root user, 1 for init_uts_ns,
> >> + * and 1 for... ?
> >> + */
> >>  struct user_namespace init_user_ns = {
> >>        .kref = {
> >> -               .refcount       = ATOMIC_INIT(2),
> >> +               .refcount       = ATOMIC_INIT(3),
> >
> > +1 is for init_nsproxy ;-)
> 
> Err, no.
> 
> +1 is to ensure it's never freed, but since allocator will BUG_ON (?) if fed
> with static object, maybe it's completely bogus.

Right.  On the one hand so long as it's high enough it doesn't really matter.
But I think it's worth getting the # exactly right in order to help document
what's going on.  So I'll try dropping it back down to 2.

thanks,
-serge