From owner-freebsd-hackers Tue Jun 12 10:57: 9 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from artax.karlin.mff.cuni.cz (artax.karlin.mff.cuni.cz [195.113.31.125]) by hub.freebsd.org (Postfix) with ESMTP id 15AD137B401; Tue, 12 Jun 2001 10:56:59 -0700 (PDT) (envelope-from mikulas@artax.karlin.mff.cuni.cz) Received: from localhost (mikulas@localhost) by artax.karlin.mff.cuni.cz (8.9.3/8.9.3/Debian 8.9.3-21) with SMTP id TAA02799; Tue, 12 Jun 2001 19:56:53 +0200 Date: Tue, 12 Jun 2001 19:56:53 +0200 (CEST) From: Mikulas Patocka Reply-To: Mikulas Patocka To: Warner Losh Cc: Poul-Henning Kamp , Mike Smith , freebsd-hackers@FreeBSD.ORG Subject: Re: Patented algorithm in FreeBSD In-Reply-To: <200106121633.f5CGXjV94720@harmony.village.org> 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 > : Well, the application date is what counts, and that's mar1992, but I'm > : pretty sure that Bill Jolitz had them beat to that date already... > > I'm pretty sure that VMS 3.x used a similar technique. I have my old > VMS internals docs from that time frame (maybe they are from 4.x). > We're talking pre 1990 for sure. Afaik VAX had one-level (pageable) page tables, so they were contignuous by definition - no need to build special window. Recent versions of VMS on Alpha use this trick - I've read about it in some paper and that's how I've found the patent. Mikulas To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message