From mboxrd@z Thu Jan  1 00:00:00 1970
From: James Yu <ypyu2011-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Any benefit of using DPDK's makefiles instead of using
Date: Fri, 17 Jan 2014 00:40:26 -0800
Message-ID: <CAFMB=kCaeOi3nz9orC+X9ZnFOMq7DcGG02d38-HD=tWhyer1Jg@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
To: "dev-VfR2kkLFssw@public.gmane.org" <dev-VfR2kkLFssw@public.gmane.org>
Return-path: <dev-bounces-VfR2kkLFssw@public.gmane.org>
List-Id: patches and discussions about DPDK <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
 <mailto:dev-request-VfR2kkLFssw@public.gmane.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev-VfR2kkLFssw@public.gmane.org>
List-Help: <mailto:dev-request-VfR2kkLFssw@public.gmane.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request-VfR2kkLFssw@public.gmane.org?subject=subscribe>
Errors-To: dev-bounces-VfR2kkLFssw@public.gmane.org
Sender: "dev" <dev-bounces-VfR2kkLFssw@public.gmane.org>

Anyone knows how to turn off TSO in DPDK+SR-IOV in KVM guest VM ? I want
the packets sending out of the KVM host not to have TSO by the hardware.

I imagine that I need to do the following:
1. turn off TSO in the guest before starting DPDK using ethtool -K ethX tso
off
    After DPDK is started, the device will be removed.
    I think the command ethtool will call ethtool function in the
ixgbevf.ko in the kernel to turn TSO off. Am I correct ?
2. turn off TSO on the host using ethtool -K ethX tso off

Do I need to do the second one ? Would the first one propagate down to the
host ?

James