Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932719Ab3CMKLj (ORCPT ); Wed, 13 Mar 2013 06:11:39 -0400 Received: from mercuryimc.plus.com ([80.229.200.144]:44155 "EHLO centos1.newflow.co.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756176Ab3CMKLh (ORCPT ); Wed, 13 Mar 2013 06:11:37 -0400 Message-ID: <514050D8.2@mimc.co.uk> Date: Wed, 13 Mar 2013 10:11:36 +0000 From: Mark Jackson User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130221 Thunderbird/17.0.3 MIME-Version: 1.0 To: Koen Kooi CC: "linux-omap@vger.kernel.org" , lkml Subject: Re: Excessive ethernet interrupts on AM335x board References: <513F4B58.1000204@mimc.co.uk> <85569979-6B4C-46D0-BDC8-B70785375D64@dominion.thruhere.net> In-Reply-To: <85569979-6B4C-46D0-BDC8-B70785375D64@dominion.thruhere.net> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1981 Lines: 41 On 13/03/13 08:44, Koen Kooi wrote: > > Op 12 mrt. 2013, om 16:35 heeft Mark Jackson het volgende geschreven: > >> I'm just fighting an issue with ethernet on our custom AM335x board:- >> >> # uname -a >> Linux nanobone 3.9.0-rc2-00113-gd60f039 #139 Tue Mar 12 15:14:01 GMT 2013 armv7l GNU/Linux >> >> Every now and then, the whole unit slows to a crawl. The only indication of any problem is:- >> >> (a) the serial tty port becomes much less responsive >> (b) normal ping times jump from 1ms to >10sec (sometimes >20sec !!) >> (c) the ethernet interrupt count rockets (see below) > > You probably have PG2.x silicon, have a look at this patch: https://github.com/beagleboard/kernel/blob/3.8/patches/net/0003-cpsw-Fix-interrupt-storm-among-other-things.patch No, it's 1.0 ... [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 3.9.0-rc2-00113-gd60f039-dirty (mpfj@mpfj-nanobone) (gcc version 4.5.4 (Buildroot 2012.11) ) #141 Wed Mar 13 09:14:03 GMT 2013 [ 0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c53c7d [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache [ 0.000000] Machine: Generic AM33XX (Flattened Device Tree), model: Newflow AM335x NanoBone [ 0.000000] Memory policy: ECC disabled, Data cache writeback [ 0.000000] CPU: All CPU(s) started in SVC mode. [ 0.000000] AM335X ES1.0 (neon ) The patch certainly didn't fix things (and possibly made things worse i.e. my nfs root kept dropping off even more). > I saw some patches going into net-next today that might address this in a different way, but I haven't tried 3.9rc on an am335x yet. I might track those down and test them. Cheers Mark J. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/