Re: [virtio-dev] Re: [PATCH v1] virtio: support VIRTIO_F_IO_BARRIER

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On Thu, May 10, 2018 at 04:02:58PM +0100, Stefan Hajnoczi wrote:
> On Thu, May 10, 2018 at 06:39:41PM +0800, Tiwei Bie wrote:
> > On Thu, May 10, 2018 at 10:53:17AM +0100, Stefan Hajnoczi wrote:
> > > On Fri, May 04, 2018 at 12:59:15PM +0800, Tiwei Bie wrote:
> > > > diff --git a/include/uapi/linux/virtio_config.h b/include/uapi/linux/virtio_config.h
> > > > index 308e2096291f..9fb519a9df28 100644
> > > > --- a/include/uapi/linux/virtio_config.h
> > > > +++ b/include/uapi/linux/virtio_config.h
> > > > @@ -49,7 +49,7 @@
> > > >   * transport being used (eg. virtio_ring), the rest are per-device feature
> > > >   * bits. */
> > > >  #define VIRTIO_TRANSPORT_F_START	28
> > > > -#define VIRTIO_TRANSPORT_F_END		34
> > > > +#define VIRTIO_TRANSPORT_F_END		37
> > > 
> > > Have you updated "2.2 Feature Bits" in the VIRTIO spec?
> > > 
> > > In 1.0 it says:
> > > 
> > >  24 to 32
> > >     Feature bits reserved for extensions to the queue and feature negotiation mechanisms
> > > 
> > > This information is out-of-date.
> > > 
> > 
> > No. In the latest spec draft, it's 24 to 33. And it
> > becomes out-of-date since VIRTIO_F_RING_PACKED(34)
> > and VIRTIO_F_IN_ORDER(35) were introduced. Do you
> > want me to update it in the IO_BARRIER patch or do
> > you want me to update it in a new patch?
> 
> Please update it to 37 in the IO_BARRIER patch.

Will do it! Thanks!

Best regards,
Tiwei Bie
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