Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!auspex!guy
From: guy@auspex.auspex.com (Guy Harris)
Newsgroups: comp.misc
Subject: Re: A tirade about inefficient software & systems
Message-ID: <4368@auspex.auspex.com>
Date: 14 Nov 90 01:35:51 GMT
References: <1990Nov1.002513.8984@ico.isc.com> <8539@scolex.sco.COM> <1990Nov5.234245.5862@bkj386.uucp>
Organization: Auspex Systems, Santa Clara
Lines: 23

>	Networking is done in the user domain on ATT boxes and ATT derived 
>	UNIX.  SCO went the berkeley way and put it in the kernel.

As opposed to AT&T who, with all the TLI stuff in S5R3 and S5R4...

...went the Berkeley way and put it in the kernel.

I shall assume that by "networking" you mean "network protocols up to
and including the transport layer"; most protocols above that layer are,
in UNIX systems, done in user mode.

The generic statement "Networking is done in the user domain on ATT
boxes and ATT derived UNIX" is false.  There may be some implementations
of networking on some AT&T machines and some AT&T-derived flavors of
UNIX (although bear in mind that 4.[123]BSD is AT&T-derived UNIX...)
that do their networking in user mode, but not *all* of them do.

>I see no reason why the disk strategy and drivers as well as the buffers
>couldn't be done this way.

As long as you don't have to use the disk strategy and drivers to page
the disk strategy and drivers into memory....  (You might have the disk
driver for the disk containing other disk drivers wired down.)