Re: [Xen-devel] watches not working from domU userspace

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 7 Jan 2006, at 01:54, Cihula, Joseph wrote:

> This is a bigger change than I was expecting, but sometimes (often ;-)
> doing the right thing is harder than doing the easy thing.  I'll start
> working on this approach.
>
> This also facilitates a useful follow-on change:  modify XS_INTRODUCE 
> to
> take a grant reference instead of an mfn and use that as the command
> (instead of XS_NEW_CONNECTION) to establish communication with the
> userspace clients.  This would have the additional benefit of not
> requiring xenstored's domain to be privileged just to map pages for its
> clients.  Of course, it would mean altering the domain builder code to
> create a grant reference for the xenbus page.
We definitely want that change anyway (and also for the console page). 
We already reserve the first 8 entries in every grant table to allow us 
to implement this in future.
 -- Keir


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