netdev - Re: ep93xx_eth stopps receiving packages

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Message-ID: <20100502104350.GS4586@mail.wantstofly.org>
Date:	Sun, 2 May 2010 12:43:50 +0200
From:	Lennert Buytenhek <buytenh@...tstofly.org>
To:	Stefan Agner <stefan@...er.ch>
Cc:	netdev@...r.kernel.org
Subject: Re: ep93xx_eth stopps receiving packages

On Mon, Apr 19, 2010 at 05:38:13PM +0200, Stefan Agner wrote:

> I'm using Linux 2.6.32.9 on a technologic systems TS-7250 SBC board, with
> the ep93xx_eth driver for networking. On three identical, but independent
> systems I noted that the system is unreachable after a while. On a serial
> terminal I noted that only the TX counter counts onward, RX stays where it 
> is,
> no matter if i try to ping from or to the system. Wireshark tells me exactly
> that too: I see helpless ARP requests which gets answered, but no ICMP. The
> system doesnt receive the ARP requests, and just sends another one.

(So does the board or does it not respond to ARP requests for its IP?)


> With a simple program which sends small packages in a fast pace I can
> reproduce the problem after several seconds (additional CPU load seem to
> provoke the problem even more). Remove and replug the network cable doesn't
> solve the problem, but ifup/down does. I don't see any messages in dmesg,
> memory is still available.

Do you see interrupts increasing in /proc/interrupts when this happens?
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