From owner-freebsd-arch Wed Jan 31 12:30:50 2001 Delivered-To: freebsd-arch@freebsd.org Received: from mass.dis.org (mass.dis.org [216.240.45.41]) by hub.freebsd.org (Postfix) with ESMTP id 9ADEF37B67D for ; Wed, 31 Jan 2001 12:30:21 -0800 (PST) Received: from mass.dis.org (localhost [127.0.0.1]) by mass.dis.org (8.11.1/8.11.1) with ESMTP id f0VKUfW00945; Wed, 31 Jan 2001 12:30:42 -0800 (PST) (envelope-from msmith@mass.dis.org) Message-Id: <200101312030.f0VKUfW00945@mass.dis.org> X-Mailer: exmh version 2.1.1 10/15/1999 To: mjacob@feral.com Cc: Dag-Erling Smorgrav , Dan Nelson , Seigo Tanimura , arch@FreeBSD.ORG Subject: Re: Bumping up {MAX,DFLT}*PHYS (was Re: Bumping up {MAX,DFL}*SIZ in i386) In-reply-to: Your message of "Wed, 31 Jan 2001 12:23:11 PST." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 31 Jan 2001 12:30:41 -0800 From: Mike Smith Sender: owner-freebsd-arch@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > > What do you mean for ISA? I thought you could do a lot more. > > Anyway, I mean, get real... PCI has been the main bus now for some years and > it can do a full 32 bits.... let's move on now, please... PCI DMA engines are still pretty sucky. In most cases though, 128K is a sensible size to be wiring for a single transfer; remember that most decent controllers will let you have a nontrivial number of outstanding transfers posted simultaneously. -- ... every activity meets with opposition, everyone who acts has his rivals and unfortunately opponents also. But not because people want to be opponents, rather because the tasks and relationships force people to take different points of view. [Dr. Fritz Todt] V I C T O R Y N O T V E N G E A N C E To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message