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From: Robert Watson <rwatson@FreeBSD.org>
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To: "M. Warner Losh" <imp@bsdimp.com>
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Cc: erik.udo@gmail.com, freebsd-hackers@FreeBSD.org, olli@lurza.secnetix.de
Subject: Re: Init.c, making it chroot
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On Sat, 30 Dec 2006, M. Warner Losh wrote:

> In message: <20061230123256.V18740@fledge.watson.org>
>            Robert Watson <rwatson@FreeBSD.org> writes:
> : Mounting a second devfs instance is undesirable for a number of
> : reasons, not least that you end up with an extra file system
> : floating around (although not reachable via the name space).  It's
> : certainly not disastrous though.
>
> At work, we have a build server.  Our build environment is a chroot'd area 
> that allows us to insultate the products we're building from the host os's 
> files completely.  We have to have a devfs entry in each of these chroots. 
> We often see dozens of devfs instances mounted on our 6.2 build boxes w/o 
> ill effect.  We've done this as far back as 5.3.

Yes, this is certainly a supported configuration, as it's also used 
extensively with jail.

Robert N M Watson
Computer Laboratory
University of Cambridge