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] Masquerading problems - XenU 3.0 on x86_64

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] Masquerading problems - XenU 3.0 on x86_64
From: Jim Pick <jim@xxxxxxxxxxx>
Date: Mon, 10 Apr 2006 12:43:19 -0700
Cc: xen-devel Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
Delivery-date: Mon, 10 Apr 2006 12:43:44 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <fcc37838df00f161b6a92dc569683a8e@xxxxxxxxxxxx>
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/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <44384EDA.2080106@xxxxxxxxxxx> <6677c9ee1b32caad4ff87bf462512ee3@xxxxxxxxxxxx> <44396C1A.5020102@xxxxxxxxxxx> <fcc37838df00f161b6a92dc569683a8e@xxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mozilla Thunderbird 0.5 (X11/20040208)
The last change I had on xen-3.0-testing.hg was:

changeset:   9612:32b22f5286be
user:        kaf24@xxxxxxxxxxxxxxxxxxxx
date:        Thu Apr  6 18:34:32 2006 +0100
summary: Fix another blkback kernel thread I introduced. :-( The kernel thread

(ignore the changeset number - I checked some stuff into my own hg

It looks like I had changeset 9579.

I built it from within a Domain 0 running the Debian unstable amd64 packages from amd64.debian.net.

$ gcc --version
gcc (GCC) 4.0.3 (Debian 4.0.3-1)

I'll attach my gzipped kernel config.

Anything else that would be useful? I can also grant you access to the machine if that would be of any benefit.


 - Jim

Keir Fraser wrote:

On 9 Apr 2006, at 21:18, Jim Pick wrote:

Has anybody else encountered this? Also, if it's already been fixed somewhere, I'd love to know. Any Netfilter debugging tips would also be appreciated.

Turn off tx checksum offload in your domU's using ethtool. We had fixed some forms of NAT with our checksum offload, but maybe not for your type of setup.

That fixed it.  Thanks!

It would be interesting to know more about your configuration, and also what Xen version you were using. Changeset 9579 fixed some bugs, so if your repository is older than that then you might well see problems.

 -- Keir

Attachment: config.gz
Description: application/gzip

Xen-devel mailing list