Re: [Xen-devel] GPLPV memory ballooning and x32

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 23/05/2010 10:11, "James Harper" <james.harper@xxxxxxxxxxxxxxxx> wrote:

> Are there any known reasons why ballooning might not work under Xen
> 3.1.x for a 32 bit Windows DomU?

32-bit HVM guest memory ballooning on 64-bit Xen is not supported until Xen
3.3.x. Earlier versions of Xen should be giving a useful warning on Xen's
logging console.

 -- Keir

> I've implemented ballooning in GPLPV and it works under Windows 2008 x32
> in my testing, but one user is reporting problems. I don't know much
> about the details yet but if it just doesn't work under 3.1.x then
> upgrading is the only outcome.
> 
> I'm using XENMEM_decrease_reservation to give pages back to xen, and
> XENMEM_populate_physmap to fill the 'holes' back in with real memory
> when the domU wants to balloon up again.
> 
> Thanks
> 
> James
> 
> 
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