Path: utzoo!utgpu!water!watmath!clyde!att-cb!cbosgd!mandrill!hal!ncoast!allbery
From: allbery@ncoast.UUCP (Brandon Allbery)
Newsgroups: comp.unix.wizards
Subject: Re: Shared Memory in BSD4.3 is lacking?
Message-ID: <7435@ncoast.UUCP>
Date: 24 Feb 88 21:48:12 GMT
References: <9100@ism780c.UUCP> <2329@umd5.umd.edu>
Reply-To: allbery@ncoast.UUCP (Brandon Allbery)
Followup-To: comp.unix.wizards
Organization: Cleveland Public Access UN*X, Cleveland, Oh
Lines: 20

As quoted from <2329@umd5.umd.edu> by chris@trantor.umd.edu (Chris Torek):
+---------------
| Anyway, BSD does not have System V style shared memory (which might
| more accurately be called `USG 3.0 style shared memory') because
| System V shared memory is wrong.  (Now there is a good flammable
| statement for you :-) )
+---------------

Umm, as far as I know, USG 3.0 (== System III) did NOT have shared memory.

What exactly is wrong with System V's shared memory?  I haven't seen any
problems with it, and certainly it's not the pain that Xenix shared memory
is (as an example; you can't leave shared memory attached across system
calls, even!).  Don't take this as a flame:  I'm truly interested in what
might be lacking.  (It works for what I do, but I'm not exactly at the
forefront of software/hardware research.)
-- 
	      Brandon S. Allbery, moderator of comp.sources.misc
       {well!hoptoad,uunet!hnsurg3,cbosgd,sun!mandrill}!ncoast!allbery
KABOOM!!! Worf: "I think I'm sick." LaForge: "I'm sure half the ship knows it."