From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: Re: arp-scan triggers via-velocity "eth0: excessive work at interrupt" Date: Wed, 13 Jun 2007 11:39:58 -0700 Message-ID: <20070613113958.2dc3332f@localhost> References: <20070613015638.31637.qmail@science.horizon.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, linux@horizon.com To: linux@horizon.com Return-path: Received: from smtp2.linux-foundation.org ([207.189.120.14]:54776 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759887AbXFMSlE (ORCPT ); Wed, 13 Jun 2007 14:41:04 -0400 In-Reply-To: <20070613015638.31637.qmail@science.horizon.com> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On 12 Jun 2007 21:56:38 -0400 linux@horizon.com wrote: > It kind of surprised me that sending 254 arp packets by using the arp-scan > tool (http://www.nta-monitor.com/tools/arp-scan/) on a /24 consistently > triggers a burst of "eth0: excessive work at interrupt." > > This is a 600 MHz PIII, 2.6.22-rc4, via-velocity driver. > > model name : Pentium III (Katmai) > stepping : 3 > cpu MHz : 601.406 > cache size : 512 KB > > 00:09.0 Ethernet controller [0200]: VIA Technologies, Inc. VT6120/VT6121/VT6122 Gigabit Ethernet Adapter [1106:3119] (rev 11) > > Just double-checking... the program actually sent 463 packets (256 + > a retry to all those that didn't respond to the first one), and triggers > 11 copies of the kernel message. > > Command line: arp-scan -I eth0 -l [-v] The via-velocity needs NAPI among lots of other fixes. The driver is too vendor ish and nobody works on it.