From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from pimout5-ext.prodigy.net (pimout5-ext.prodigy.net [207.115.63.73]) by ozlabs.org (Postfix) with ESMTP id 0C35E67B7D for ; Fri, 21 Jul 2006 04:38:04 +1000 (EST) Received: from localhost (ppp-70-244-201-23.dsl.austtx.swbell.net [70.244.201.23]) by pimout5-ext.prodigy.net (8.13.6 out.dk/8.13.6) with ESMTP id k6KIWLat264408 for ; Thu, 20 Jul 2006 14:32:21 -0400 Date: Thu, 20 Jul 2006 13:32:42 -0500 From: Ian Remmler To: linuxppc-embedded@ozlabs.org Subject: Problem with ibm_emac driver Message-ID: <20060720183242.GA22930@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi, I'm having a problem with the ibm_emac driver for the built in gigabit ethernet on the 440gx. I was hoping someone could shed some light or at least point me in the right direction. I'm using a GMS P502 board runing 2.4.27-pre3 (from GMS). The problem we are having is this: when we push data over the emac interface (eth0 and eth1 both show the problem), we sporadically get a "MAL: Rx descriptor error..." from mal_rxde in ibm_ocp_mal.c. Occasionally, the interface will "freeze up" for a few seconds. An ifconfig down/up will bring it back, but from then on it will freeze up again right away. It looks to me like this error indicates that we're out of RX buffers, but I don't how we would be running out. I'm no kernel or networking expert, but I thought the TCP stack would take care of throttling itself to prevent that sort of thing. I would appreciate any help. Thanks, - Ian. -- "A shark on whiskey is mighty risky. A shark on beer is a beer engineer." -- Dr. Worm