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

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Date: Mon, 5 Jun 2023 01:44:28 -0400
From: "Michael S. Tsirkin" <mst@...hat.com>
To: Xuan Zhuo <xuanzhuo@...ux.alibaba.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, 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.

-- 
MST