From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH RFC 0/2] veth, bridge, and GSO maximums Date: Thu, 30 Nov 2017 10:47:21 -0500 (EST) Message-ID: <20171130.104721.823106331151241632.davem@davemloft.net> References: <20171126181749.19288-1-sthemmin@microsoft.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, sthemmin@microsoft.com To: stephen@networkplumber.org Return-path: Received: from shards.monkeyblade.net ([184.105.139.130]:46114 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752764AbdK3PrX (ORCPT ); Thu, 30 Nov 2017 10:47:23 -0500 In-Reply-To: <20171126181749.19288-1-sthemmin@microsoft.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Stephen Hemminger Date: Sun, 26 Nov 2017 10:17:47 -0800 > This pair of patchesimproves the performance when running > containers in an environment where underlying device has lower > GSO maximum (such as Azure). > > With containers a veth pair is created and one end is attached > to the bridge device. The bridge device correctly reports > computes GSO parameters that are the minimum of the lower devices. > > The problem is that the other end of the veth device (in container) > reports the full GSO size. This patch propogates the upper > (bridge device) parameters to the other end of the veth device. > > Please consider it as alternative to the sysfs GSO changes. I like this approach a lot, please resubmit this formally.