From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <3e1162e60603300802p11175731w1e2dc91e56f3a50a@mail.gmail.com>
Date: Thu, 30 Mar 2006 08:02:57 -0800
From: "David Leimbach" <leimy2k@gmail.com>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@cse.psu.edu>
Subject: Re: [9fans] [OT] linux origins, why not?
In-Reply-To: <442B3496.9060308@lanl.gov>
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References: <3a2c5ee90758f46a3696656c51a44025@quanstro.net>
	<442B3496.9060308@lanl.gov>
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On 3/29/06, Ronald G Minnich <rminnich@lanl.gov> wrote:
> quanstro@quanstro.net wrote:
>
> > mach was developed at cmu and freely available, wasn't it? the document=
ation
> > was (tree killers).
>
>
> best Mach phrase: "micro kernel doesn't mean it is small, just that it
> does not do much".
>
> from a flame war that erupted when the leviathan mach 3.0 came out.
>
> Well, it may have been big, but at least it was slow.
>
> Lots of good research came out of mach ... not what you think. sandia
> national labs has done lots of great OS work for 10 years, or so,
> spurred on by the unusable Mach-derived OSF-1/MK-AD that came on their
> paragon, and the need to toss it and start clean. SNL did some very nice
> work, all due to the need to get rid of the "micro kernel".
>

In case anyone was interested.  The madmen at UNSW are porting Darwin
(the mac os x unix portion that used to be freely available until the
intel macs came out) to L4

http://www.ertos.nicta.com.au/software/darbat/

I know Qualcomm also uses L4 in real production hardware now for
embedded systems.

You can't lump all microkernels together.  Mach was/is a really poor
microkernel compared to others of today's standards.  QNX has a much
better one as well.

Dave

> ron
>