The nature of kernel of the FreeBSD
rwatson at FreeBSD.org
Sat Sep 9 08:14:16 PDT 2006
On Wed, 6 Sep 2006, Mike Meyer wrote:
> In <2699850609061520wad7f0f2s7b402fb7789336ff at mail.gmail.com>, Eder <ederbs.hackers at gmail.com> typed:
>> A doubt,
>> Kernel of the FreeBSD is monolithic, correct !!!
>> The MacOS is derived from kernel of the FreeBSD, correct !!!
> Not correct. The MacOS kernel is derived from Mach, not FreeBSD.
> The MacOS userland is mostly derived from FreeBSD, but includes tools from
> the other BSDs, and the current direction is to mimic the Linux userland
> (i.e. /bin/sh is bash).
I can't help but wonder: has anyone participating in this thread read any of
the XNU source code other than me? Take a look at two subtrees in particular:
bsd/ FreeBSD-derived kernel BSD subsystem, including network stack
osfmk/ Mach-derived VM, scheduler
The current BSD code in Darwin differs significantly from current FreeBSD, but
clearly has similar roots. You'll even find Julian's devfs.
Robert N M Watson
University of Cambridge
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