Re: [Xen-devel] Multiple-page mem_event ring buffer?

[Razvan Cojocaru <rzvncj@xxxxxxxxx>]

> > Could I safely use more than one page for the ring buffer (passing '2'
> > as the last parameter of xc_map_foreign_batch(), and so on), or am I
> > limited to 1 page by design?
> You would have to change Xen itself to also view the N pages as a contiguous 
> region in the virtual address space. I think vmap has been recently added for 
> that purpose, but I know nothing about its limitations (cc'ing Jan).
>
> You would also want to retain the old interface and add a new domctl for N-page 
> ring setup. And some refactoring of all the places where that sequence of calls 
> needed for setup is repeated. And a pony ;)
Ah, that's what I thought. Will ask management to budget for the pony :)


Thanks,
Razvan Cojocaru


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