From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752332Ab0IOGRP (ORCPT ); Wed, 15 Sep 2010 02:17:15 -0400 Received: from e32.co.us.ibm.com ([32.97.110.150]:55385 "EHLO e32.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751450Ab0IOGRN (ORCPT ); Wed, 15 Sep 2010 02:17:13 -0400 Subject: Re: [RFC PATCH 2/2] macvtap: TX zero copy between guest and host kernel From: Shirley Ma To: "Michael S. Tsirkin" Cc: "Xin, Xiaohui" , Avi Kivity , David Miller , "arnd@arndb.de" , "netdev@vger.kernel.org" , "kvm@vger.kernel.org" , "linux-kernel@vger.kernel.org" In-Reply-To: <20100915052724.GA25481@redhat.com> References: <1284410580.13351.10.camel@localhost.localdomain> <1284410883.13351.14.camel@localhost.localdomain> <20100913.201730.27805132.davem@davemloft.net> <4C8F3C77.7010302@redhat.com> <1284476719.13351.35.camel@localhost.localdomain> <1284518452.13351.111.camel@localhost.localdomain> <20100915052724.GA25481@redhat.com> Content-Type: text/plain; charset="UTF-8" Date: Tue, 14 Sep 2010 23:17:08 -0700 Message-ID: <1284531428.24603.251.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 (2.28.3-1.fc12) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2010-09-15 at 07:27 +0200, Michael S. Tsirkin wrote: > For some of the issues, try following the discussion around > net: af_packet: don't call tpacket_destruct_skb() until the skb is > sent > out. > > Summary: it's difficult to do correctly generally. Limiting ourselves > to transmit on specific devices might make it possible. Thanks for the tips. Shirley