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Date:      Thu, 18 Feb 2010 11:26:34 -0600
From:      Mark Linimon <linimon@lonesome.com>
To:        Andreas Nilsson <andrnils@gmail.com>
Cc:        freebsd-jail@freebsd.org
Subject:   Re: Emulating different versions of FreeBSD
Message-ID:  <20100218172634.GA28262@lonesome.com>
In-Reply-To: <e31a2e1002180754u20c52ff5xd3e34ccd19ba1d98@mail.gmail.com>
References:  <e31a2e1002180754u20c52ff5xd3e34ccd19ba1d98@mail.gmail.com>

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On Thu, Feb 18, 2010 at 04:54:08PM +0100, Andreas Nilsson wrote:
> Could the jail architecture be used to run/emulate different versions of
> FreeBSD on the same machine?

portmgr does that on the package build machines all the time.  AFAIK we
don't do anything special to the kernel/userland we run in the jails.

Of course, you need to make sure that what's in the jail is no newer than
the native kernel/userland.

mcl



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