Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932550Ab3CMIoY (ORCPT ); Wed, 13 Mar 2013 04:44:24 -0400 Received: from mail-ee0-f46.google.com ([74.125.83.46]:48364 "EHLO mail-ee0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755317Ab3CMIoT convert rfc822-to-8bit (ORCPT ); Wed, 13 Mar 2013 04:44:19 -0400 Content-Type: text/plain; charset=US-ASCII Mime-Version: 1.0 (Mac OS X Mail 6.2 \(1499\)) Subject: Re: Excessive ethernet interrupts on AM335x board From: Koen Kooi In-Reply-To: <513F4B58.1000204@mimc.co.uk> Date: Wed, 13 Mar 2013 09:44:15 +0100 Cc: "linux-omap@vger.kernel.org" , lkml Content-Transfer-Encoding: 7BIT Message-Id: <85569979-6B4C-46D0-BDC8-B70785375D64@dominion.thruhere.net> References: <513F4B58.1000204@mimc.co.uk> To: Mark Jackson X-Mailer: Apple Mail (2.1499) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1111 Lines: 21 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 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.-- 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/