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References: <506CAEF3-E94F-4C2E-8824-D1FBD782A6EA@seiya.me>
 <41F29A27-8C9E-4B0F-AC51-E2AD6CF28118@gmail.com>
From: Alex Merritt <merritt.alex@gmail.com>
Date: Thu, 7 May 2015 18:04:31 -0400
Message-ID: <CADK3taL7LqfO6fteaPb8bFVdJF8+NL5xpd1Eksuzr1nWi6NhYg@mail.gmail.com>
Subject: Re: User-mode FreeBSD?
To: Garrett Cooper <yaneurabeya@gmail.com>
Cc: Seiya Nuta <nuta@seiya.me>, 
 "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>
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On Thu, May 7, 2015 at 6:49 AM, Garrett Cooper <yaneurabeya@gmail.com>
wrote:

>
> > On May 6, 2015, at 23:10, Seiya Nuta <nuta@seiya.me> wrote:
> >
> > Hello.
> >
> > I want to run FreeBSD kernel in userland to use it as a library OS.
> >
> > Does FreeBSD kernel supports running in the userland like User Mode
> Linux?
>
> Not yet, but it's desired for a variety of reasons (see netbsd's RUMP
> infrastructure).
> Cheers!


DragonFly (FreeBSD derivative) supports a "virtual kernel" mode, like what
you are asking:

http://www.dragonflybsd.org/features/

I have not had the chance yet to use this myself.