From owner-freebsd-net@FreeBSD.ORG  Sun Mar  8 15:13:32 2015
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 2E90C337
 for <freebsd-net@freebsd.org>; Sun,  8 Mar 2015 15:13:32 +0000 (UTC)
Received: from mail-wi0-x234.google.com (mail-wi0-x234.google.com
 [IPv6:2a00:1450:400c:c05::234])
 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))
 (Client CN "smtp.gmail.com",
 Issuer "Google Internet Authority G2" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id C6ADBA25
 for <freebsd-net@freebsd.org>; Sun,  8 Mar 2015 15:13:31 +0000 (UTC)
Received: by wibhm9 with SMTP id hm9so14303118wib.2
 for <freebsd-net@freebsd.org>; Sun, 08 Mar 2015 08:13:30 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=message-id:date:from:user-agent:mime-version:to:subject
 :content-type:content-transfer-encoding;
 bh=Y2FIDV9n/zSRSEBRqq4xN1vuRPE14Y0BenikNy+kbH4=;
 b=GvSXl/z9TpRXBOB9lDSXMagARt/YHpBUaeOQRqVZhXVNK6flRgcvhAXK/lbqlfCC7V
 MeR8QqEJtD8IIGlI92JUXE3Qt+PbEv13oNAZeexS+PbOM4azHcq/qdmBYL9VY6EvEQv9
 P1hgVzAnxLrGhUWbEcnXXtHEI43KhFxH+A3Pa9evEPA1NAswINuERxDSslf1tx6U61ut
 fXUxkpbkmOhgiKQkAcUnXj9+s/hG++DB763vIU5FjIHahBuzRg9DjKSk9MYknF8h4UAL
 /NEcdZj/NmWd/QvLmyX0ZqtqHyAIpPE1ksltl7QHwzRB7dnpDPtwxV1v55ya8PuFZQJu
 eUFw==
X-Received: by 10.181.12.105 with SMTP id ep9mr95666263wid.85.1425827610054;
 Sun, 08 Mar 2015 08:13:30 -0700 (PDT)
Received: from inverness.bcn.sia.es (213.Red-88-5-239.dynamicIP.rima-tde.net.
 [88.5.239.213])
 by mx.google.com with ESMTPSA id ub1sm24122290wjc.43.2015.03.08.08.13.29
 for <freebsd-net@freebsd.org>
 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
 Sun, 08 Mar 2015 08:13:29 -0700 (PDT)
Message-ID: <54FC6711.1050906@gmail.com>
Date: Sun, 08 Mar 2015 15:13:21 +0000
From: "C.L. Martinez" <carlopmart@gmail.com>
User-Agent: Mozilla/5.0 (X11; Linux x86_64;
 rv:31.0) Gecko/20100101 Thunderbird/31.5.0
MIME-Version: 1.0
To: freebsd-net@freebsd.org
Subject: rxcsum and txcsum needs to be disabled under KVM
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.18-1
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-net>,
 <mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net/>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
 <mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 08 Mar 2015 15:13:32 -0000

Hi all,

  Yesterday, I have installed CentOS7 in my laptop to do some tests with 
LXC and KVM recent releases.

  One of these guests, it is a FreeBSD 10.1-RELEASE-p6 vm. One of the 
problems that I have detected is with network when virtio nics are used. 
This guest loose a lot of packets until I have disabled rx and tx in all 
virtual nics.

  Is this a FreeBSD bug or do I need to configure something under KVM?

Thanks.