Re: [PATCH vhost next 06/10] vdpa: Add means to communicate vq status on get_vq_state

[Jason Wang]

On 2020/7/16 äå4:21, Eli Cohen wrote:
> On Thu, Jul 16, 2020 at 04:11:00PM +0800, Jason Wang wrote:
> > On 2020/7/16 äå3:23, Eli Cohen wrote:
> > > Currently, get_vq_state() is used only to pass the available index value
> > > of a vq. Extend the struct to return status on the VQ to the caller.
> > > For now, define VQ_STATE_NOT_READY. In the future it will be extended to
> > > include other infomration.
> > >
> > > Modify current vdpa driver to update this field.
> > >
> > > Reviewed-by: Parav Pandit<parav@xxxxxxxxxxxx>
> > > Signed-off-by: Eli Cohen<eli@xxxxxxxxxxxx>
> > What's the difference between this and get_vq_ready()?
> >
> > Thanks
> There is no difference. It is just a way to communicate a problem to
> with the state of the VQ back to the caller. This is not available now.
> I think an asynchronous is preferred but that is not available
> currently.


I still don't see the reason, maybe you can give me an example?

Thanks