From mboxrd@z Thu Jan 1 00:00:00 1970 From: "David S. Miller" Subject: Re: Re: TSO and IPoIB performance degradation Date: Tue, 07 Mar 2006 17:23:36 -0800 (PST) Message-ID: <20060307.172336.107863253.davem@davemloft.net> References: <1141776697.6119.938.camel@localhost> <20060307.161808.60227862.davem@davemloft.net> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, openib-general@openib.org, shemminger@osdl.org Return-path: To: rdreier@cisco.com In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: openib-general-bounces@openib.org Errors-To: openib-general-bounces@openib.org List-Id: netdev.vger.kernel.org From: Roland Dreier Date: Tue, 07 Mar 2006 17:17:30 -0800 > The reason TSO comes up is that reverting the patch described below > helps (or helped at some point at least) IPoIB throughput quite a bit. I wish you had started the thread by mentioning this specific patch, we wasted an enormous amount of precious developer time speculating and asking for arbitrary tests to be run in order to narrow down the problem, yet you knew the specific change that introduced the performance regression already... This is a good example of how not to report a bug.