From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qy0-f189.google.com (mail-qy0-f189.google.com [209.85.221.189]) by ozlabs.org (Postfix) with ESMTP id EAC28B7D0A for ; Thu, 8 Apr 2010 17:07:35 +1000 (EST) Received: by qyk27 with SMTP id 27so2528114qyk.23 for ; Thu, 08 Apr 2010 00:07:33 -0700 (PDT) MIME-Version: 1.0 Date: Thu, 8 Apr 2010 12:37:33 +0530 Message-ID: Subject: Netdev watchdog timed out on gianfar ethernet driver From: kalyan Alle To: linuxppc-dev@lists.ozlabs.org, kalyan Alle Content-Type: text/plain; charset=ISO-8859-1 List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi , We are using gianfar ethernet driver in our device (2.6.20 kernel). I have observed the following error after i run high throughput traffic for some time. NETDEV WATCHDOG: eth0: transmit timed out The Kernel we are using is 2.6.20 kernel. I have added the work queue support in the gfar_timeout (which was not there in the 2.6.20 ) ,which was given in the later kernels from 2.6.27. Without the work queue support i observed the crash. More precisely the crash is fixed with the work queue effort ,but still i could see the NETDEV WATCHDOG: eth0: transmit timed out . which stops the end to end traffic flow in few seconds after the bidirectional traffic is pumped. I have given "ifconfig eth0 down" when this happend and then "ifconfig eth0 up" The interface down and up seems to have brought the eht0 into active state and traffic continued to run. Can any bidy suggest a clue as how to fix the NETDEV WATCHDOG: eth0: transmit timed out issue. thanks kalyan alle