From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: Misuse of LRO, how widespread Date: Mon, 6 Dec 2010 12:18:29 -0800 Message-ID: <20101206121829.5b8c852e@nehalam> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: David Miller , Olof Johansson , Ben Hutchings , Divy Le Ray Return-path: Received: from mail.vyatta.com ([76.74.103.46]:40940 "EHLO mail.vyatta.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752841Ab0LFUSl (ORCPT ); Mon, 6 Dec 2010 15:18:41 -0500 Sender: netdev-owner@vger.kernel.org List-ID: I inspected all drivers in net-next to see which drivers are using LRO and which ones are broken. Most concerning is that Chelsio and Solarflare drivers ignore ETH_FLAG_LRO. The ones that are using LRO but allow disabling it: qlcnic, netxen, mv643, s2io, myi10ge, bnx2x, ixgbe, vmxnet3 One driver seems confused about LRO vs GRO: mlx4 - comments about LRO and depends on LRO but driver is using GRO Drivers with not using ethtool interface to disable LRO: pasemi_mac, sfc, ehea, cxgb3, cxgb4