This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-devel] xen.git branch reorg

To: bderzhavets@xxxxxxxxx
Subject: Re: [Xen-devel] xen.git branch reorg
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Fri, 24 Apr 2009 12:48:46 -0700
Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Delivery-date: Fri, 24 Apr 2009 12:49:15 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <782611.11477.qm@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <782611.11477.qm@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Thunderbird (X11/20090320)
Boris Derzhavets wrote:

 In meantime time i see,  that 2.6.30-rc3&rc2&rc1-tip are affected.
Solution is the same as on Solaris xVM Linux DomUs about one
year ago - is to disable checksum (nothing else) offloading at Linux DomUs ( CentOS 5.3, Ubuntu 9.04)

/usr/local/sbin/ethtool -K etho tx off

OK, that's a good lead.

Ian, do you remember the story around this checksumming stuff? Has something dropped off netback (or front) that we need?
I will run "tcpdump" through this weekend to find out what's going
wrong. To be honest,  i have experience with catching checksum offloading
failure via tcpdump's  capturing only on Solaris Nevada xVM ;)
But, i'll post the logs captured anyway.
Just a brief instruction where to run tcpdump ( and what command line keys are needed ) would help a lot.

Actually, I think that's enough to go on for now.


Xen-devel mailing list

<Prev in Thread] Current Thread [Next in Thread>