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Subject: Re: ? about kernel size..
From: John Clark <jeclark2006@aim.com>
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Date: Tue, 8 Mar 2016 17:42:44 -0800
Cc: Adrian Chadd <adrian.chadd@gmail.com>,
 "freebsd-embedded@freebsd.org" <freebsd-embedded@freebsd.org>,
 Ian Lepore <ian@freebsd.org>
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To: Brad Walker <bwalker@musings.com>
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On Mar 8, 2016, at 5:20 PM, Brad Walker <bwalker@musings.com> wrote:

> For example, we have a requirement to implement SSL/TLS, BTLE, and ftp =
on a
> microkernel. By the time this is done, it will be worthwhile to look =
at
> alternatives. Not to mention, the needs just keep coming.
>=20
> -brad w.

At which point I become very vociferous in arguing against using a =
process so limited that it can=92t run a BSD/Linux derivative.

This sort of happened with the recent brush with the 8051=85 The Boss =
wanted to have the 8051 do some TCP/IP with some sort of
Ethernet interface that was available from the company that made the =
8051=85

At which point I found a $15 AP based on MIPS/Atheros SoC, and provided =
not only TCP/IP but also a local hotspot for control/monitoring, =
ethernet hub, mini http server, etc.

If someone wanted to reduce cost from $15 they could have gotten the =
Eval package and gotten the design to a manufacturing house for much =
less as well=85
Of course they would talking about volumes many times greater than 100s=85=


The 8051 controller was still in there, but the =91fancy=92 stuff was on =
a board that could handle =91fancy=92 stuff without making the project =
2-3 years worth of development on a minimal
processor platform.

Another aspect of the =91minimal system=92 that is required to do =
=91fancy=92 stuff, is that often the TCP/IP implementation is sort of =
=91half-baked=92 and can introduce problems which go
far beyond just not accessing the device=85 it could cause problems for =
the entire network, and require much debugging to solve=85 or even =
understand what=92s going on=85

This may be ok if the devices are located in conveniently accessible =
locations=85 but if one has to go to a remote location via helicopter or =
pack in equipment with mules=85
such issues become bigger than the cost savings of some minimal =
solution.

John Clark.