From owner-freebsd-arm@FreeBSD.ORG  Thu Jun 28 09:09:21 2007
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From: =?iso-8859-1?Q?Bj=F6rn_K=F6nig?= <bkoenig@alpha-tierchen.de>
To: "PowerMan" <powerman1st@gmail.com>
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Cc: freebsd-arm@freebsd.org
Subject: Re: A simple question about FreeBSD-ARM, thanks for reply
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PowerMan wrote:

>     Now I intend to study the principle of OS, but I find the linux
> kernel is too large and complex, so I change to FreeBSD.

The FreeBSD kernel is not significantly less complex. The linux kernel has
a better pronounced modularisation.

>     Would the FreeBSD-ARM be very complex? How many lines would the
> source code of the kernel (without device drivers, just the key modules
> like FS, MM, porcess scheduler, TCP/IP and the others) be?

Approximately 15 MB of source code.

I suggest to read a book to learn something about the various parts of an
operating system kernel.

http://www.amazon.com/Design-Implementation-FreeBSD-Operating-System/dp/0201702452

Regards
Björn