netdev - Re: [RFC net-next 00/18] virtio

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Date:   Mon, 2 Dec 2019 10:29:38 -0500
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     Prashant Bhole <prashantbhole.linux@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jason Wang <jasowang@...hat.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>, netdev@...r.kernel.org,
        qemu-devel@...gnu.org, kvm@...r.kernel.org
Subject: Re: [RFC net-next 00/18] virtio_net XDP offload

On Wed, Nov 27, 2019 at 03:40:14PM -0800, Jakub Kicinski wrote:
> > For better or worse that's how userspace is written.
> 
> HW offload requires modifying the user space, too. The offload is not
> transparent. Do you know that?

It's true, offload of program itself isn't transparent. Adding a 3rd
interface (software/hardware/host) isn't welcome though, IMHO.

-- 
MST