From nobody@FreeBSD.org  Thu Oct 10 21:22:53 2013
Return-Path: <nobody@FreeBSD.org>
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
	(using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
	(No client certificate requested)
	by hub.freebsd.org (Postfix) with ESMTP id B01C46A7
	for <freebsd-gnats-submit@FreeBSD.org>; Thu, 10 Oct 2013 21:22:53 +0000 (UTC)
	(envelope-from nobody@FreeBSD.org)
Received: from oldred.freebsd.org (oldred.freebsd.org [8.8.178.121])
	(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
	(No client certificate requested)
	by mx1.freebsd.org (Postfix) with ESMTPS id 9CD6D2F0E
	for <freebsd-gnats-submit@FreeBSD.org>; Thu, 10 Oct 2013 21:22:53 +0000 (UTC)
Received: from oldred.freebsd.org ([127.0.1.6])
	by oldred.freebsd.org (8.14.5/8.14.7) with ESMTP id r9ALMrWs013852
	for <freebsd-gnats-submit@FreeBSD.org>; Thu, 10 Oct 2013 21:22:53 GMT
	(envelope-from nobody@oldred.freebsd.org)
Received: (from nobody@localhost)
	by oldred.freebsd.org (8.14.5/8.14.5/Submit) id r9ALMrmL013851;
	Thu, 10 Oct 2013 21:22:53 GMT
	(envelope-from nobody)
Message-Id: <201310102122.r9ALMrmL013851@oldred.freebsd.org>
Date: Thu, 10 Oct 2013 21:22:53 GMT
From: Hugo Silva <hugo@barafranca.com>
To: freebsd-gnats-submit@FreeBSD.org
Subject: FreeBSD HVMPV domU networking does not work 
X-Send-Pr-Version: www-3.1
X-GNATS-Notify:

>Number:         182884
>Category:       kern
>Synopsis:       [hyper-v] FreeBSD HVMPV domU networking does not work
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-emulation
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Oct 10 21:30:00 UTC 2013
>Closed-Date:    
>Last-Modified:  Sun May 04 02:48:52 UTC 2014
>Originator:     Hugo Silva
>Release:        10.0-ALPHA5
>Organization:
>Environment:
FreeBSD iscsi 10.0-ALPHA5 FreeBSD 10.0-ALPHA5 #0 r256092: Sun Oct 6 22:30:23 UTC 2013 root@snap.freebsd.org:/usr/obj/usr/src/sys/sys/GENERIC amd64
>Description:
Under a NetBSD 6.1.2/amd64 and Xen 4.2.3, FreeBSD 10.0-ALPHA5 network is unstable/unusable.

Trying to ssh in to the virtual machine does not work.

On the first attempt, ssh from the client hung in connect() and at the
FreeBSD domU console there was a panic[1].

On the dom0 console, the following was shown:
xvif3i0: packet size 1610 too big
xvif3i0: packet size 0 too big
xvif3i0: packet size 1544 too big


Disabling txcsum and rxcsum[2] makes the client hang in select() instead,
but on the FreeBSD we still see "xn_txeof: WARNING: response is -1!",
while simultaneously on the dom0 the following is printed to the system
console: "xvif5i0: packet cross page boundary". The SSH connection is of
course never established.
-----

[1] https://webmail.ami.org.pt/panic.jpg
[2] http://lists.freebsd.org/pipermail/freebsd-xen/2011-May/000940.html --
    I saw & reported this same error on 9.x two years ago. It was fixed.
    Also, I run a 10-CURRENT snapshot from maybe half a year ago and
    everything works as expected there as well.
>How-To-Repeat:

>Fix:


>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: freebsd-bugs->freebsd-emulation 
Responsible-Changed-By: linimon 
Responsible-Changed-When: Sun Oct 20 23:07:29 UTC 2013 
Responsible-Changed-Why:  
reclassify and assign. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=182884 
>Unformatted:
