Re: [Xen-devel] Page sharing in Xen?

["Mike D. Day" <ncmike@xxxxxxxxxx>]

Keir Fraser wrote:
> On 12 Jul 2006, at 03:38, Jae-Wan Jang wrote:
>
> > I want to know whether Xen shares pages between domains or not.
> > When I read "Memory Resource Management in VMware ESX server",
> > they use page sharing between domains with hash value of a page.
> > So I wonder that Xen uses this technique
> > or if not, is there anyone who is implementing this to Xen now or
> > willing to do so.
> There is explicit page sharing in Xen, but the kind of automatic scheme 
> described in that paper. This is largely because it's unclear how great 
> the benefit would be in practice.
Page coalescing is a frequently requested feature, not just for Xen/x86 
but for other platforms/Hypervisors. It would be good if we can 
incorporate it into Xen.
Mike

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