From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [RFC][PATCH 1/1] cxgb3i: cxgb3 iSCSI initiator Date: Mon, 11 Aug 2008 14:51:29 -0700 (PDT) Message-ID: <20080811.145129.215922169.davem@davemloft.net> References: <20080811.140918.213422266.davem@davemloft.net> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: 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 To: rdreier@cisco.com Return-path: In-Reply-To: Sender: linux-scsi-owner@vger.kernel.org List-Id: netdev.vger.kernel.org From: Roland Dreier Date: Mon, 11 Aug 2008 14:37:59 -0700 > > But as Herbert says, we can make LRO such that turning it off > > isn't necessary. > > > > Can we shape the iSCSI offload traffic without turning it off? > > Sure... the same way we can ask the HW vendors to keep old headers > around when aggregating for LRO, we can ask HW vendors for hooks for > shaping iSCSI traffic. And the Chelsio TCP speed record seems to show > that they already have pretty sophisticated queueing/shaping in their > current HW. You don't get it, you can't add the entire netfilter and qdisc stack into the silly firmware. And we can't fix bugs there either.