Re: [Xen-devel] [PATCH v2] Persistent grant maps for xen blk drivers

[Ian Campbell]

On Mon, 2012-09-24 at 12:36 +0100, Jan Beulich wrote:
> >>> On 21.09.12 at 17:52, Oliver Chick <oliver.chick@xxxxxxxxxx> wrote:
> > Changes since v1:
> > 
> >  * Maximum number of persistent grants per device now 64, rather than
> >    256, as this is the actual maxmimum request in a (1 page) ring.
> 
> As said previously, I don't see why this needs to have a separate
> #define at all - it's simply __RING_SIZE(). No adding this would
> also imply that - apart from perhaps documenting the new xenstore
> nodes - io/blkif.h would need changing at all (which otherwise would
> require a hypervisor side patch to be submitted too).

Whether or not this definition is required in blkif.h we certainly want
a patch to the hypervisor tree to document this new protocol extension.

Ian.

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