From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rick Jones Subject: Re: [PATCH] Disable TSO for non standard qdiscs Date: Thu, 31 Jan 2008 10:26:19 -0800 Message-ID: <47A212CB.1060403@hp.com> References: <20080131124632.GA25299@basil.nowhere.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, davem@davemloft.net To: Andi Kleen Return-path: Received: from g4t0017.houston.hp.com ([15.201.24.20]:10590 "EHLO g4t0017.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763035AbYAaS0W (ORCPT ); Thu, 31 Jan 2008 13:26:22 -0500 In-Reply-To: <20080131124632.GA25299@basil.nowhere.org> Sender: netdev-owner@vger.kernel.org List-ID: Andi Kleen wrote: > TSO interacts badly with many queueing disciplines because they rely on > reordering packets from different streams and the large TSO packets can > make this difficult. This patch disables TSO for sockets that send over > devices with non standard queueing disciplines. That's anything but noop > or pfifo_fast and pfifo right now. Does this also imply that JumboFrames interacts badly with these qdiscs? Or IPoIB with its 65000ish byte MTU? rick jones