From owner-freebsd-hackers Thu Feb 13 11:07:20 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id LAA01490 for hackers-outgoing; Thu, 13 Feb 1997 11:07:20 -0800 (PST) Received: from labinfo.iet.unipi.it (labinfo.iet.unipi.it [131.114.9.5]) by freefall.freebsd.org (8.8.5/8.8.5) with SMTP id LAA01484 for ; Thu, 13 Feb 1997 11:07:13 -0800 (PST) Received: from localhost (luigi@localhost) by labinfo.iet.unipi.it (8.6.5/8.6.5) id TAA22913; Thu, 13 Feb 1997 19:20:54 +0100 From: Luigi Rizzo Message-Id: <199702131820.TAA22913@labinfo.iet.unipi.it> Subject: Re: Status of 21140AC driver ? To: tim@futuresouth.com (Tim Tsai) Date: Thu, 13 Feb 1997 19:20:54 +0100 (MET) Cc: hackers@freebsd.org In-Reply-To: <199702131853.MAA23776@shell.futuresouth.com> from "Tim Tsai" at Feb 13, 97 12:52:59 pm X-Mailer: ELM [version 2.4 PL23] Content-Type: text Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk > > > what is the status of the 21140-AC driver ? I have a lab of brand > > new diskless machines, running 2.1.6 -- The machines with the > > 21140-AB work fine with the stock 2.1.6 if_de.c , the ones with > > 21140-AC do not. I have remade a kernel with the if_de.c taken from > > netbsd; now the old cards seem not to work, and the new cards work fine > > up to the point where I try to access the nfs-mounted filesystem (as > > also Tim Tsai experienced. > > I've tried limiting the r/w size to 1024 as suggsted by the handbook was that a suggestion specific to the if_de driver or a general thing with low-performance boards (which the 21140-AC is not!) ? Anyways this make me suspect either some MTU mismatch (but that seems unlikely, since the relevant code in the two drivers looks the same) or some buffer-management problems in the new (netbsd-derived) driver. I cannot try this now, but if someone has a machine alive with a 21140-AC, can s/he try pinging the machine with large (~1500 bytes and more) packets and see when/if it stops responding, possibly using tcpdump and taking a note of the offending packet size ? That could give some insight to track down the bug. Thanks Luigi -----------------------------+-------------------------------------- Luigi Rizzo | Dip. di Ingegneria dell'Informazione email: luigi@iet.unipi.it | Universita' di Pisa tel: +39-50-568533 | via Diotisalvi 2, 56126 PISA (Italy) fax: +39-50-568522 | http://www.iet.unipi.it/~luigi/ _____________________________|______________________________________