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From: rbj@icst-cmr.arpa (Root Boy Jim)
Newsgroups: comp.unix.wizards
Subject: Free Software Foundation (was: Re: Mach, the new standard?)
Message-ID: <9860@brl-adm.ARPA>
Date: Mon, 19-Oct-87 20:53:24 EST
Article-I.D.: brl-adm.9860
Posted: Mon Oct 19 20:53:24 1987
Date-Received: Sun, 25-Oct-87 01:45:04 EST
Sender: news@brl-adm.ARPA
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   From: Doug Gwyn  <gwyn@brl-smoke.arpa>

   In article <7672@felix.UUCP> preston@felix.UUCP (Preston Bannister) writes:
   >The fork call is going to be awefully expensive, as a copy of the
   >entire data space of the parent will be made.

   It need not be; don't copy the pages until a attempt to modify them occurs.

Don't even copy them then. Copy only the stack. Why is it that people are 
are so resistant to the idea of sharing data space? Shared memory for free!

It is conceivable (and probable) that this would be a separate system call
because this feature is not always wanted.

	(Root Boy) Jim Cottrell	<rbj@icst-cmr.arpa>
	National Bureau of Standards
	Flamer's Hotline: (301) 975-5688
Alright, you!!  Imitate a WOUNDED SEAL pleading for a PARKING SPACE!!