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From: guy@sun.uucp (Guy Harris)
Newsgroups: net.unix-wizards
Subject: Re: 4.2BSD on uVaxII ??
Message-ID: <2257@sun.uucp>
Date: Sat, 1-Jun-85 02:57:19 EDT
Article-I.D.: sun.2257
Posted: Sat Jun  1 02:57:19 1985
Date-Received: Thu, 6-Jun-85 03:12:56 EDT
References: <> <400@rna.UUCP> <471@psivax.UUCP>
Organization: Sun Microsystems, Inc.
Lines: 15

> 	I have a hard believing the *'d item. BSD4.x has had hashed
> inodes and linked process queues since before it was released!
> I should know, I have seen pre-release listings of the kernel source
> from Berkeley and these features are there. I cannot see Berkeley
> removing them after putting them in!

What is the value of "x" in "BSD4.x"?  4.1BSD had hashed inode and buffer
lookup, which stayed around in 4.2.  4.2 (and, I think, 4.1) also had
pointers to a process' parent, youngest living child, next older sibling,
and next younger sibling, but didn't use any of those other than the parent
pointer.  4.3 uses those pointers (it's a trivial change to make 4.2 use
them), and also has a linked list of non-empty process table slots, which
4.2 did not have.

	Guy Harris