[Devel] Re: [PATCH 0/9] namespaces: Introduction

[Pavel Machek]

On Pá 19-05-06 08:13:34, Andrew Morton wrote:
> Herbert Poetzl <herbert at 13thfloor.at> wrote:
> >
> > let me
> >  give a simple example here:
> 
> Examples are useful.
> 
> >   "pid virtualization"
> > 
> >   - Linux-VServer doesn't really need that right now.
> >     we are perfectly fine with "pid isolation" here, we
> >     only "virtualize" the init pid to make pstree happy
> > 
> >   - Snapshot/Restart and Migration will require "full"
> >     pid virtualization (that's where Eric and OpenVZ
> >     are heading towards)
> 
> snapshot/restart/migration worry me.  If they require complete
> serialisation of complex kernel data structures then we have a problem,
> because it means that any time anyone changes such a structure they need to
> update (and test) the serialisation.
> 
> This may be a show-stopper, in which case maybe we only need to virtualise
> pid #1.

Well, if pid #1 virtualization is only needed for pstree, we may want
to fix pstree instead :-).
								Pavel
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