Re: [PATCH v1] vdpa/mlx5: Restore the hardware used index after change map

[Si-Wei Liu <si-wei.liu@xxxxxxxxxx>]

On 2/19/2021 6:38 PM, Jason Wang wrote:

> > >           
> > >           Right now the value is exposed to userspace via
> > >           GET_VRING_BASE, so only last_avail_idx is synced. If we need
> > >           sync last_used_idx, we should also sync pending indices which
> > >           requires more thoughts.
> > >           
> > >         
> >         Technically it doesn't sound right - crossing the boundary a bit
> >         even with simplified form of assumption. But depending on how
> >         userspace could make use of this API, it doesn't seem it breaks
> >         existing functionality for the moment.
> >         
> >       
>       
>       
>       I don't get here, maybe you can explain a little bit more?
>     
    Please refer to the email I just sent.
    
https://lore.kernel.org/lkml/033b0806-4037-5755-a1fa-91dbb58bab2e@xxxxxxxxxx/
    
    -Siwei
  

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