From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: TSO not 10G friendly if peer is close enough Date: Wed, 18 Apr 2012 05:00:38 +0200 Message-ID: <1334718038.2472.76.camel@edumazet-glaptop> References: <4F8D93E1.9090000@intel.com> <1334681204.2472.41.camel@edumazet-glaptop> <1334698722.2472.71.camel@edumazet-glaptop> <20120417.174759.327568768780440362.davem@davemloft.net> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: alexander.h.duyck@intel.com, jeffrey.t.kirsher@intel.com, donald.c.skidmore@intel.com, gregory.v.rose@intel.com, john.r.fastabend@intel.com, jesse.brandeburg@intel.com, netdev@vger.kernel.org To: David Miller Return-path: Received: from mail-we0-f174.google.com ([74.125.82.174]:59324 "EHLO mail-we0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751021Ab2DRDAn (ORCPT ); Tue, 17 Apr 2012 23:00:43 -0400 Received: by wejx9 with SMTP id x9so4429738wej.19 for ; Tue, 17 Apr 2012 20:00:42 -0700 (PDT) In-Reply-To: <20120417.174759.327568768780440362.davem@davemloft.net> Sender: netdev-owner@vger.kernel.org List-ID: On Tue, 2012-04-17 at 17:47 -0400, David Miller wrote: > From: Eric Dumazet > Date: Tue, 17 Apr 2012 23:38:42 +0200 > > > Hmm... maybe tcp_trim_head should not trim but only update an offset in > > skb... With some luck, offset can reach skb->len when all data is > > ACKnowledged... > > This is definitely the way to fix this. Just essentially defer all > the page operations until later when the entire SKB is consumed. Yes, I'll implement this today. Thanks