Re: [vserver] official kernel inclusion

From: Herbert Poetzl <>
Date: Thu 10 Jan 2008 - 00:30:25 GMT
Message-ID: <>

On Wed, Jan 09, 2008 at 04:15:16PM -0800, Martin Fick wrote:
> --- Herbert Poetzl <> wrote:
> >
> > mainline goes for the heavier process virtualization
> > instead of isolation ...
> Could you explain what you mean by that?

mainline in general heads for the straight and
complete virtualization approach, they do not bother
with performant isolation and corner cases (yet)

> Are you talking about the recent "PID Namespaces" work
> in the mainline? (bottom of this page:)

yep, precisely

> Is this something that is much heavier (I realize it
> is potentially more featureful) than the vserver
> technique?

nah, not _that_ much heavier, but, in certain cases
too heavy compared to what Linux-VServer is doing.

for example, consider 1000 guests with a single
daemon running inside, on mainline that would give
2000 processes (init + daemon) while we can do with
only 1001 processes (single shared init)

> Now that the mainline has this support,
> would it not make sense,

> is it possible to use it even for the vserver project?

yes, and we are providing this in _addition_ to
the process isolation, as alternative ... so the
choice (which one you prefer) is yours


> -Martin
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Received on Thu Jan 10 00:30:43 2008

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