netdev - Re: [PATCH vhost v10 10/10] virtio

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Date: Tue, 6 Jun 2023 10:11:51 +0800
From: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
To: "Michael S. Tsirkin" <mst@...hat.com>
Cc: Jakub Kicinski <kuba@...nel.org>,
 virtualization@...ts.linux-foundation.org,
 Jason Wang <jasowang@...hat.com>,
 "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>,
 Paolo Abeni <pabeni@...hat.com>,
 Alexei Starovoitov <ast@...nel.org>,
 Daniel Borkmann <daniel@...earbox.net>,
 Jesper Dangaard Brouer <hawk@...nel.org>,
 John Fastabend <john.fastabend@...il.com>,
 netdev@...r.kernel.org,
 bpf@...r.kernel.org
Subject: Re: [PATCH vhost v10 10/10] virtio_net: support dma premapped

On Mon, 5 Jun 2023 01:44:28 -0400, "Michael S. Tsirkin" <mst@...hat.com> wrote:
> On Mon, Jun 05, 2023 at 10:10:44AM +0800, Xuan Zhuo wrote:
> > On Fri, 2 Jun 2023 23:31:52 -0700, Jakub Kicinski <kuba@...nel.org> wrote:
> > > On Fri,  2 Jun 2023 17:22:06 +0800 Xuan Zhuo wrote:
> > > >  drivers/net/virtio_net.c | 163 +++++++++++++++++++++++++++++++++------
> > >
> > > ack for this going via the vhost tree, FWIW, but you'll potentially
> > > need to wait for the merge window to move forward with the actual
> > > af xdp patches, in this case.
> >
> >
> > My current plan is to let virtio support premapped dma first, and then implement
> > virtio-net to support af-xdp zerocopy.
> >
> > This will indeed involve two branches. But most of the implementations in this
> > patch are virtio code, so I think it would be more appropriate to commit to
> > vhost. Do you have any good ideas?
> >
> >
> > Thanks.
>
> Are you still making changes to net core? DMA core? If it's only
> virtio-net then I can probably merge all of it - just a couple of
> bugfixes there so far, it shouldn't cause complex conflicts.

Just one small change to net core. no dma core.

I will try to fix this problem.

Thanks.

>
> --
> MST
>