Messages in this thread | | | Date | Mon, 22 May 2006 01:32:15 +0200 | From | Herbert Poetzl <> | Subject | Re: [PATCH 0/9] namespaces: Introduction |
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On Sun, May 21, 2006 at 05:18:50PM -0600, Eric W. Biederman wrote: > Pavel Machek <pavel@ucw.cz> writes: > > > Well, if pid #1 virtualization is only needed for pstree, we may want > > to fix pstree instead :-).
yes, actually this and init itself (which uses the pid to switch between init and telinit behaviour) are the only two applications we found so far ...
and as far as I know, those work with non pid=1 values on other operating systems (inside containers)
a fix there would definitely be appreciated and I think it would not hurt normal behaviour ...
> One thing that is not clear is if isolation by permission checks is > any easier to implement than isolation with a namespace.
for the pid space, I'm not really sure if isolation is really cheaper than virtualization, but for the network space for example, a virtualization solution which is as lightweigth as the isolation is probably more challenging, although not impossible ...
> Isolation at permission checks may actually be more expensive in terms > of execution time, and maintenance.
again, for the pid space, maintenance is quite low ..
best, Herbert
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