Re: [DOC v4] Xen transport for 9pfs

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

> ## Ring Setup
> 
> The shared page has the following layout:
> 
>     typedef uint32_t XEN_9PFS_RING_IDX;
> 
>     struct xen_9pfs_intf {
>     	XEN_9PFS_RING_IDX in_cons, in_prod;
>     	uint8_t pad[56];
>     	XEN_9PFS_RING_IDX out_cons, out_prod;
> 
>     	uint32_t ring_order;
>         /* this is an array of (1 << ring_order) elements */
>     	grant_ref_t ref[1];
>     };
> 
>     /* not actually C compliant (ring_order changes from ring to ring) */
>     struct ring_data {
>         char in[((1 << ring_order) << PAGE_SHIFT) / 2];
>         char out[((1 << ring_order) << PAGE_SHIFT) / 2];
>     };
> 

This is the same comment about the the PV Calls structure.

Would it make sense to add the 'in_events' and 'out_events'
as a notification mechanism?


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