From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757662AbYHKVx1 (ORCPT ); Mon, 11 Aug 2008 17:53:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753493AbYHKVxO (ORCPT ); Mon, 11 Aug 2008 17:53:14 -0400 Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:38024 "EHLO sunset.davemloft.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753485AbYHKVxN (ORCPT ); Mon, 11 Aug 2008 17:53:13 -0400 Date: Mon, 11 Aug 2008 14:53:13 -0700 (PDT) Message-Id: <20080811.145313.178992274.davem@davemloft.net> To: rdreier@cisco.com Cc: rick.jones2@hp.com, jgarzik@pobox.com, swise@opengridcomputing.com, divy@chelsio.com, kxie@chelsio.com, netdev@vger.kernel.org, open-iscsi@googlegroups.com, michaelc@cs.wisc.edu, daisyc@us.ibm.com, wenxiong@us.ibm.com, bhua@us.ibm.com, dm@chelsio.com, leedom@chelsio.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC][PATCH 1/1] cxgb3i: cxgb3 iSCSI initiator From: David Miller In-Reply-To: References: <48A08145.6060703@hp.com> <20080811.141254.165409473.davem@davemloft.net> X-Mailer: Mew version 5.2 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: Roland Dreier Date: Mon, 11 Aug 2008 14:41:16 -0700 > > > Probably depends on whether or not the iSCSI offload solutions are doing > > > zero-copy receive into the filecache? > > > > That's a data placement issue, which also can be solved with > > stateless offloading. > > How can you place iSCSI data properly with only stateless offloads? By teaching the stateless offload how to parse the iSCSI headers on the flow and place the data into pages at the correct offsets such that you can place the pages hanging off of the SKB directly into the page cache.