Date: Thu, 13 Feb 1997 19:20:54 +0100 (MET) From: Luigi Rizzo <luigi@labinfo.iet.unipi.it> To: tim@futuresouth.com (Tim Tsai) Cc: hackers@freebsd.org Subject: Re: Status of 21140AC driver ? Message-ID: <199702131820.TAA22913@labinfo.iet.unipi.it> In-Reply-To: <199702131853.MAA23776@shell.futuresouth.com> from "Tim Tsai" at Feb 13, 97 12:52:59 pm
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> > > 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 <tim@futuresouth.com> 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/ _____________________________|______________________________________
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