From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeremy Fitzhardinge Subject: Re: Re: Using Xen Virtualization Environment for Development and Testing of Supercomputing and High Performance Computing (HPC) Cluster MPICH2 MPI-2 Applications Date: Fri, 30 Oct 2009 08:22:11 -0700 Message-ID: <4AEB04A3.5020100@goop.org> References: <20091030094943.GL1434@reaktio.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20091030094943.GL1434@reaktio.net> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: =?ISO-8859-1?Q?Pasi_K=E4rkk=E4inen?= Cc: xen-devel@lists.xensource.com, "Mr. Teo En Ming (Zhang Enming)" , xen-users@lists.xensource.com List-Id: xen-devel@lists.xenproject.org On 10/30/09 02:49, Pasi K=E4rkk=E4inen wrote: > On Fri, Oct 30, 2009 at 04:35:00PM +0800, Mr. Teo En Ming (Zhang Enming= ) wrote: > =20 >> Dear All, >> >> I have solved the problem. >> >> With reference to >> [1]http://lists.xensource.com/archives/html/xen-devel/2009-05/msg01= 327.html >> and >> [2]http://hightechsorcery.com/2008/03/virtualization-tip-always-dis= able-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 >> >> =20 > Jeremy: Do you know why this is still needed nowadays?=20 > > Where's the bug? Why doesn't it work with the defaults?=20 > =20 I committed bugfix relating to gso/tso a couple of days ago, so I think (hope!) this shouldn't be necessary any more. J