From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757044AbZA3WPp (ORCPT ); Fri, 30 Jan 2009 17:15:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755694AbZA3WPe (ORCPT ); Fri, 30 Jan 2009 17:15:34 -0500 Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:49363 "EHLO sunset.davemloft.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1754069AbZA3WPd (ORCPT ); Fri, 30 Jan 2009 17:15:33 -0500 Date: Fri, 30 Jan 2009 14:15:31 -0800 (PST) Message-Id: <20090130.141531.56578757.davem@davemloft.net> To: w@1wt.eu Cc: jarkao2@gmail.com, zbr@ioremap.net, herbert@gondor.apana.org.au, dada1@cosmosbay.com, ben@zeus.com, mingo@elte.hu, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, jens.axboe@oracle.com Subject: Re: [PATCH v2] tcp: splice as many packets as possible at once From: David Miller In-Reply-To: <20090130221346.GE31355@1wt.eu> References: <20090130215920.GC31355@1wt.eu> <20090130.140346.159984249.davem@davemloft.net> <20090130221346.GE31355@1wt.eu> X-Mailer: Mew version 6.1 on Emacs 22.1 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Willy Tarreau Date: Fri, 30 Jan 2009 23:13:46 +0100 > On Fri, Jan 30, 2009 at 02:03:46PM -0800, David Miller wrote: > > Any NIC, even the dumbest ones, can be made to receive into pages. > > OK I thought that it was not always easy to split between headers > and payload. I know that myri10ge can be configured to receive into > either skbs or pages, but I was not sure about the real implications > behind that. For a dumb NIC you wouldn't split, you'd receive directly, the entire packet, into part of a page. Then right befire you give it to the stack, you pull the ethernet header from the page into the linear area.