Re: RE: RE: [virtio] [PATCH requirements 6/7] net-features: Add packet timestamp requirements

[Xuan Zhuo <xuanzhuo@linux.alibaba.com>]

On Tue, 15 Aug 2023 04:01:25 +0000, Parav Pandit <parav@nvidia.com> wrote:
>
>
> > From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
> > Sent: Tuesday, August 15, 2023 8:17 AM
> >
> > > Packed q needs yet another format.
> > > And even after that we still have to live with other limitations listed in other
> > requirements.
> >
> > I would like some simple changes for the tx timestamp.
> >
> > >
> > > Therefore its better to do the new desc definition one time which enables to
> > optionally support timestamp, using single descriptor format.
> >
> >
> > I agree.
> >
> > But we can have too. In addition to your plans, I would like to introduce a simple
> > method that can be used with existing machines.
> >
> Can you please explain what is a "existing machine"?
> This is the change in driver device interface.
> So one needs new driver and device extension anyway.


The devices that are running now.


If the change for timestamp is small, then that will be easy for these devices
to update.

But the timestamp is so usefull, we want introduce this feature to these devices.

I see your new description, for the existing devices, that will be high risk to
update. And the new description maybe not be needed for they.

Thanks.