From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Stefano Stabellini <stefano@aporeto.com>
Cc: andr2000@gmail.com, xen-devel@lists.xenproject.org,
wei.liu2@citrix.com, andrew.cooper3@citrix.com
Subject: Re: [DOC v4] Xen transport for 9pfs
Date: Wed, 8 Feb 2017 14:20:29 -0500 [thread overview]
Message-ID: <20170208192029.GA9302@char.us.ORACLE.com> (raw)
In-Reply-To: <alpine.DEB.2.10.1702071135290.17946@sstabellini-ThinkPad-X260>
> ## 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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next prev parent reply other threads:[~2017-02-08 19:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-07 19:38 [DOC v4] Xen transport for 9pfs Stefano Stabellini
2017-02-08 19:20 ` Konrad Rzeszutek Wilk [this message]
2017-02-10 1:31 ` Stefano Stabellini
2017-02-10 18:45 ` Konrad Rzeszutek Wilk
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