From owner-freebsd-hackers Mon Jan 28 14:49:53 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from acl.lanl.gov (acl.lanl.gov [128.165.147.1]) by hub.freebsd.org (Postfix) with SMTP id DB78037B419 for ; Mon, 28 Jan 2002 14:49:46 -0800 (PST) Received: (qmail 702386 invoked from network); 28 Jan 2002 15:49:45 -0700 Received: from snaresland.acl.lanl.gov (128.165.147.113) by acl.lanl.gov with SMTP; 28 Jan 2002 15:49:45 -0700 Received: (qmail 23219 invoked by uid 3499); 28 Jan 2002 15:49:45 -0700 Received: from localhost (sendmail-bs@127.0.0.1) by localhost with SMTP; 28 Jan 2002 15:49:45 -0700 Date: Mon, 28 Jan 2002 15:49:45 -0700 (MST) From: Ronald G Minnich X-X-Sender: To: "DOROVSKOY,IGOR (A-Portsmouth,ex1)" Cc: 'Andrew Boothman' , Subject: RE: OS Textbook FreeBSD Appendix In-Reply-To: <0D9185CE635BD511ACA50090277A6FCF13599A@axcs18.cos.agilent.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Mon, 28 Jan 2002, DOROVSKOY,IGOR (A-Portsmouth,ex1) wrote: > I've took a brief look on Unix presentation and was wondering, why author > says that "...most Unix systems have not permitted shared memory because > the PDP-11 hardware did not encourage it..."? where'd they get this? that's an odd statement. Shared memory was used all the time on Unix on -11s, that's the whole point of the shared text a.out format. Of course shared read-only text is not exactly the standard shared memory, but at the same time it shows feasibility. The address space was so small though that other mechanisms were used. ron To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message