From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: [PATCH net-next 2/2] openvswitch: Use zerocopy if applicable when performing the upcall Date: Fri, 24 May 2013 15:34:30 -0700 Message-ID: <1369434870.3301.452.camel@edumazet-glaptop> References: <064a09fffe48540b66a3ee503860ed9e8a1eb5f1.1369406826.git.tgraf@suug.ch> <1369421900.3301.431.camel@edumazet-glaptop> <1369432621.3301.445.camel@edumazet-glaptop> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: Thomas Graf , netdev , "dev@openvswitch.org" To: Jesse Gross Return-path: Received: from mail-pb0-f47.google.com ([209.85.160.47]:40067 "EHLO mail-pb0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753893Ab3EXWeb (ORCPT ); Fri, 24 May 2013 18:34:31 -0400 Received: by mail-pb0-f47.google.com with SMTP id rr4so4707511pbb.6 for ; Fri, 24 May 2013 15:34:31 -0700 (PDT) In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: On Fri, 2013-05-24 at 15:18 -0700, Jesse Gross wrote: > Offloads are supported. What I want to know is how they affect > performance with this change. Hmm, I do not understand why you are checksumming then. skb_copy_and_csum_dev() is a killer.