Re: [Xen-devel] Allowing several mappings of a frame

[Keir Fraser <keir.xen@xxxxxxxxx>]

On 27/10/2011 22:16, "Mohammad Hedayati" <hedayati.mo@xxxxxxxxx> wrote:

> Xen currently allows granting a single frame to several domains,
> several times (to map or copy). Though the feature itself seems
> appealing, I wonder if there's a real use case in any ports or PV
> aware applications (i.e. a page is mapped or copied by more than 2
> domains). Is there?

It wouldn't typically happen.

> Except the condition outlined above, PGC_count_mask part of a
> page->count_info can be more than 1?

Yes. Go trace some count_info values in a running system. Most will be >1.

 -- Keir

> Thanks,
> Mohammad
> 
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