Quoting Serge E. Hallyn (serue@us.ibm.com):
> Quoting Pavel Emelyanov (xemul@openvz.org):
> > The option is called NAMESPACES. It can be selectable only
> > if EMBEDDED is chosen (this was Eric's requisition). When
> > the EMBEDDED is off namespaces will be on automatically.
> > 
> > One more option (NAMESPACES_EXPERIMENTAL) was added by 
> > Serge's request to move there all the namespaces that are 
> > not finished yet. Currently only the user and the network
> > namespaces are such.
> > 
> > Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
> > 
> > ---
> > 
> > diff --git a/init/Kconfig b/init/Kconfig
> > index 684ccfb..05a71d7 100644
> > --- a/init/Kconfig
> > +++ b/init/Kconfig
> > @@ -369,6 +360,23 @@ config RELAY
> > 
> >  	  If unsure, say N.
> > 
> > +config NAMESPACES
> > +	bool "The namespaces support" if EMBEDDED
> > +	default !EMBEDDED
> > +	help
> > +	  Provides the way to make tasks work with different objects using
> > +	  the same id. For example same IPC id may refer to different objects
> > +	  or same user id or pid may refer to different tasks when used in
> > +	  different namespaces.
> > +
> > +config NAMESPACES_EXPERIMENTAL
> > +	bool "Add the experimantal namespaces support" if EMBEDDED
> 
> Hi Pavel,
> 
> Overall this patchset looks good.
> 
> However the NAMESPACES_EXPERIMENTAL option should not have the
> 'if EMBEDDED', right?  This is about EXPERIMENTAL, not about
> EMBEDDED, unlike the plain NAMESPACES option.
> 
> -serge

Actually that doesn't seem to work either.  Even though
SECURITY_NAMESPACES=y, the config system seems to infer that
since NAMESPACES is not user-selectable, NAMESPACES_EXPERIMENTAL
shouldn't be either.  So we end up with NAMESPACES_EXPERIMENTAL
being on and not un-selectable if !EMBEDDED.

> > +	depends on NAMESPACES && EXPERIMENTAL
> > +	default !EMBEDDED
> > +	help
> > +	  Also include the support for the namespaces that are not fnished
> > +	  or well developed yet
> > +
> >  config BLK_DEV_INITRD
> >  	bool "Initial RAM filesystem and RAM disk (initramfs/initrd) support"
> >  	depends on BROKEN || !FRV
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