From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH]NET: Add ECN support for TSO Date: Sat, 08 Jul 2006 13:32:23 -0700 (PDT) Message-ID: <20060708.133223.35527292.davem@davemloft.net> References: <1551EAE59135BE47B544934E30FC4FC093F9B4@NT-IRVA-0751.brcm.ad.broadcom.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: ravinandan.arakali@neterion.com, herbert@gondor.apana.org.au, netdev@vger.kernel.org Return-path: Received: from dsl027-180-168.sfo1.dsl.speakeasy.net ([216.27.180.168]:36573 "EHLO sunset.davemloft.net") by vger.kernel.org with ESMTP id S1030349AbWGHUcj (ORCPT ); Sat, 8 Jul 2006 16:32:39 -0400 To: mchan@broadcom.com In-Reply-To: <1551EAE59135BE47B544934E30FC4FC093F9B4@NT-IRVA-0751.brcm.ad.broadcom.com> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org From: "Michael Chan" Date: Fri, 7 Jul 2006 18:01:34 -0700 > However, Large Receive Offload will be a different story. If > packets are accumulated in the hardware and presented to the stack > as one large packet, the stack will not be able to calculate the > cumulative NS correctly. Unless the hardware calculates the partial > NS over the LRO packet and puts it in the SKB when handing over the > packet. This is correct, LRO hardware would need to do something to make sure the nonce parity works out.