Linux Virtualization - Oct 2023 - [PATCH vhost 00/22] virtio-net: support AF_XDP zero copy

On Thu, Oct 12, 2023 at 9:58?AM Xuan Zhuo <xuanzhuo at linux.alibaba.com>
wrote:
>
> On Wed, 11 Oct 2023 10:00:57 -0700, Jakub Kicinski <kuba at
kernel.org> wrote:
> > On Wed, 11 Oct 2023 17:27:06 +0800 Xuan Zhuo wrote:
> > > ## AF_XDP
> > >
> > > XDP socket(AF_XDP) is an excellent bypass kernel network
framework. The zero
> > > copy feature of xsk (XDP socket) needs to be supported by the
driver. The
> > > performance of zero copy is very good. mlx5 and intel ixgbe
already support
> > > this feature, This patch set allows virtio-net to support
xsk's zerocopy xmit
> > > feature.
> >
> > You're moving the driver and adding a major feature.
> > This really needs to go via net or bpf.
> > If you have dependencies in other trees please wait for
> > after the merge window.
>
>
> If so, I can remove the first two commits.
>
> Then, the sq uses the premapped mode by default.
> And we can use the api virtqueue_dma_map_single_attrs to replace the
> virtqueue_dma_map_page_attrs.
>
> And then I will fix that on the top.
>
> Hi Micheal and Jason, is that ok for you?
I would go with what looks easy for you but I think Jakub wants the
series to go with next-next (this is what we did in the past for
networking specific features that is done in virtio-net). So we need
to tweak the prefix to use net-next instead of vhost.

Thanks

>
> Thanks.
>

On Thu, 12 Oct 2023 15:50:13 +0800, Jason Wang <jasowang at redhat.com>
wrote:
> On Thu, Oct 12, 2023 at 9:58?AM Xuan Zhuo <xuanzhuo at
linux.alibaba.com> wrote:
> >
> > On Wed, 11 Oct 2023 10:00:57 -0700, Jakub Kicinski <kuba at
kernel.org> wrote:
> > > On Wed, 11 Oct 2023 17:27:06 +0800 Xuan Zhuo wrote:
> > > > ## AF_XDP
> > > >
> > > > XDP socket(AF_XDP) is an excellent bypass kernel network
framework. The zero
> > > > copy feature of xsk (XDP socket) needs to be supported by
the driver. The
> > > > performance of zero copy is very good. mlx5 and intel ixgbe
already support
> > > > this feature, This patch set allows virtio-net to support
xsk's zerocopy xmit
> > > > feature.
> > >
> > > You're moving the driver and adding a major feature.
> > > This really needs to go via net or bpf.
> > > If you have dependencies in other trees please wait for
> > > after the merge window.
> >
> >
> > If so, I can remove the first two commits.
> >
> > Then, the sq uses the premapped mode by default.
> > And we can use the api virtqueue_dma_map_single_attrs to replace the
> > virtqueue_dma_map_page_attrs.
> >
> > And then I will fix that on the top.
> >
> > Hi Micheal and Jason, is that ok for you?
>
> I would go with what looks easy for you but I think Jakub wants the
> series to go with next-next (this is what we did in the past for
> networking specific features that is done in virtio-net). So we need
> to tweak the prefix to use net-next instead of vhost.
OK.

I will fix that in next version.

Thanks.
>
> Thanks
>
>
> >
> > Thanks.
> >
>