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Re: [Xen-devel] Re: Using Xen Virtualization Environment for Developmen

To: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: Re: [Xen-devel] Re: Using Xen Virtualization Environment for Development and Testing of Supercomputing and High Performance Computing (HPC) Cluster MPICH2 MPI-2 Applications
From: "Mr. Teo En Ming (Zhang Enming)" <space.time.universe@xxxxxxxxx>
Date: Sat, 31 Oct 2009 00:07:42 +0800
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, space.time.universe@xxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
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Oh no. Another 1 hour to compile latest pv-ops dom0 kernel :-)

Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical Engineering)
Alma Maters:
(1) Singapore Polytechnic
(2) National University of Singapore
My blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
My Youtube videos: http://www.youtube.com/user/enmingteo
Email: space.time.universe@xxxxxxxxx
MSN: teoenming@xxxxxxxxxxx
Mobile Phone (SingTel): +65-9648-9798
Mobile Phone (Starhub Prepaid): +65-8369-2618
Age: 31 (as at 30 Oct 2009)
Height: 1.78 meters
Race: Chinese
Dialect: Hokkien
Street: Bedok Reservoir Road
Country: Singapore

On Sat, Oct 31, 2009 at 12:04 AM, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
On Fri, Oct 30, 2009 at 08:22:11AM -0700, Jeremy Fitzhardinge wrote:
> On 10/30/09 02:49, Pasi Kärkkäinen wrote:
> > On Fri, Oct 30, 2009 at 04:35:00PM +0800, Mr. Teo En Ming (Zhang Enming) wrote:
> >
> >>    Dear All,
> >>
> >>    I have solved the problem.
> >>
> >>    With reference to
> >>    [1]http://lists.xensource.com/archives/html/xen-devel/2009-05/msg01327.html
> >>    and
> >>    [2]http://hightechsorcery.com/2008/03/virtualization-tip-always-disable-checksumming-virtual-ethernet-devices
> >>    , I have executed the following command as root on all my 6 compute nodes
> >>    (each compute node is a F11 linux 64-bit PV virtual machine).
> >>
> >>    # ethtool -K eth0 tx off gso on
> >>
> >>
> > Jeremy: Do you know why this is still needed nowadays?
> >
> > Where's the bug? Why doesn't it work with the defaults?
> >
> I committed bugfix relating to gso/tso a couple of days ago, so I think
> (hope!) this shouldn't be necessary any more.

Ok. So it's just a matter of upgrading dom0 kernel, and then verifying
it works without ethtool hacks?

-- Pasi

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