From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: [PATCH] abysmal e1000 performance (DITR) Date: Thu, 26 Aug 2004 16:26:50 -0400 Sender: netdev-bounce@oss.sgi.com Message-ID: <412E478A.2000806@pobox.com> References: <468F3FDA28AA87429AD807992E22D07E014CEF36@orsmsx408> <1093542930.1027.124.camel@jzny.localdomain> <1093550644.20769.130.camel@tubarao> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: hadi@cyberus.ca, "Venkatesan, Ganesh" , netdev@oss.sgi.com, "Feldman, Scott" , "Brandeburg, Jesse" Return-path: To: tharbaugh@lnxi.com In-Reply-To: <1093550644.20769.130.camel@tubarao> Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org Thayne Harbaugh wrote: > On Thu, 2004-08-26 at 13:55 -0400, jamal wrote: > >>Ganesh, >> >>Can you please make this feature off by default and perhaps >>accesible via ethtool for peopel who want to turn it on. >>I just wasted a few hours and was bitten by this performance-wise. >>Please consider disabling it. > > > This is a *horrible* problem. Even though it's fixable by passing a > module parameter, the default bites those that *know* about it. We have > had customers bitten by this and customers that have insisted in > swapping all the NICs in a cluster to Broadcom TG3 NICs. > > It's a black eye for Intel and a loss of business - that's the opinion > of our customers. If it's so bad we should disable it by default, either via the module parameter or via a kernel CONFIG_xxx option. Jeff