From owner-freebsd-net Fri Jul 5 7:46:31 2002 Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 64A1637B407 for ; Fri, 5 Jul 2002 07:46:23 -0700 (PDT) Received: from duke.cs.duke.edu (duke.cs.duke.edu [152.3.140.1]) by mx1.FreeBSD.org (Postfix) with ESMTP id 989D343E31 for ; Fri, 5 Jul 2002 07:46:22 -0700 (PDT) (envelope-from gallatin@cs.duke.edu) Received: from grasshopper.cs.duke.edu (grasshopper.cs.duke.edu [152.3.145.30]) by duke.cs.duke.edu (8.9.3/8.9.3) with ESMTP id KAA23277; Fri, 5 Jul 2002 10:46:20 -0400 (EDT) Received: (from gallatin@localhost) by grasshopper.cs.duke.edu (8.11.6/8.9.1) id g65EjoG29016; Fri, 5 Jul 2002 10:45:50 -0400 (EDT) (envelope-from gallatin@cs.duke.edu) From: Andrew Gallatin MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15653.45342.299963.692216@grasshopper.cs.duke.edu> Date: Fri, 5 Jul 2002 10:45:50 -0400 (EDT) To: Bosko Milekic Cc: "Kenneth D. Merry" , net@FreeBSD.ORG Subject: Re: virtually contig jumbo mbufs (was Re: new zero copy sockets snapshot) In-Reply-To: <20020705104247.A518@unixdaemons.com> References: <20020619233721.A30669@unixdaemons.com> <15633.62357.79381.405511@grasshopper.cs.duke.edu> <20020620114511.A22413@unixdaemons.com> <15634.534.696063.241224@grasshopper.cs.duke.edu> <20020620134723.A22954@unixdaemons.com> <15652.46870.463359.853754@grasshopper.cs.duke.edu> <20020705002056.A5365@unixdaemons.com> <15653.35919.24295.698563@grasshopper.cs.duke.edu> <20020705093435.A25047@unixdaemons.com> <15653.43437.658461.49860@grasshopper.cs.duke.edu> <20020705104247.A518@unixdaemons.com> X-Mailer: VM 6.75 under 21.1 (patch 12) "Channel Islands" XEmacs Lucid Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Bosko Milekic writes: > > On Fri, Jul 05, 2002 at 10:14:05AM -0400, Andrew Gallatin wrote: > > I think this would be fine, But we'd need to know more about the > > hardware limitations of the popular GiGE boards out there. We know > > Tigon-II can handle 4 scatters, but are there any that can handle 3 > > but not four? > > Why would you need 4? I can absolutely guarantee that a jumbo buf > will not go over 3 pages (on i386, and 2 pages on alpha). > Perhaps I misread your earlier message. I thought you wanted to be free to align them on something other than a page boundary, so as to not waste so much space. In that case you'd need 4 scatters on i386, right? Drew To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message