From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 8BC711007D1 for ; Fri, 25 Nov 2011 16:25:36 +1100 (EST) Message-ID: <1322198727.32635.25.camel@pasglop> Subject: Re: ibm_newemac tx problem with jumbo frame enabled From: Benjamin Herrenschmidt To: Prashant Bhole Date: Fri, 25 Nov 2011 16:25:27 +1100 In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Cc: linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Fri, 2011-11-18 at 10:33 +0530, Prashant Bhole wrote: > Hi, > I have been facing problem with ibm_newemac driver (v3.54). > The board gets disconnected and can not be pinged in between > some heavy network traffic. In my case I am running IOmeter > "All-in-One" 8 threads on the iSCSI target. MTU is 4088. > > I found that after executing emac_full_tx_reset(), the board can > be pinged again. Again after some heavy traffic of 5-6 seconds, > traffic stops. This can be repeated after full tx reset. > > Is this a known issue? what could cause this? > Any pointers would be greatly appreciated. Not that I know of. Can you check if any of the error reporting registers trip anything ? Could it just be a fifo overflow which we may not be handling properly in the driver ? Cheers, Ben.