From mboxrd@z Thu Jan  1 00:00:00 1970
From: Shirley Ma <mashirle@us.ibm.com>
Subject: Re: [RFC PATCH 2/2] macvtap: TX zero copy between guest and host
 kernel
Date: Tue, 14 Sep 2010 09:00:25 -0700
Message-ID: <1284480025.13351.49.camel@localhost.localdomain>
References: <1284410580.13351.10.camel@localhost.localdomain>
	 <4C8F3C77.7010302@redhat.com>
	 <1284476719.13351.35.camel@localhost.localdomain>
	 <201009141721.13202.arnd@arndb.de>  <20100914152231.GA13105@redhat.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Cc: Arnd Bergmann <arnd@arndb.de>, Avi Kivity <avi@redhat.com>,
	David Miller <davem@davemloft.net>, xiaohui.xin@intel.com,
	netdev@vger.kernel.org, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org
To: "Michael S. Tsirkin" <mst@redhat.com>
Return-path: <linux-kernel-owner@vger.kernel.org>
In-Reply-To: <20100914152231.GA13105@redhat.com>
Sender: linux-kernel-owner@vger.kernel.org
List-Id: netdev.vger.kernel.org

On Tue, 2010-09-14 at 17:22 +0200, Michael S. Tsirkin wrote:
> I would expect this to hurt performance significantly.
> We could do this for asynchronous requests only to avoid the
> slowdown. 

Is kiocb in sendmsg helpful here? It is not used now.

Shirley