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Re: [Xen-devel] HVM dynamic physical memory

To: David Pilger <pilger.david@xxxxxxxxx>
Subject: Re: [Xen-devel] HVM dynamic physical memory
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Sun, 31 Dec 2006 13:08:35 +0000
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On 31/12/06 1:03 pm, "David Pilger" <pilger.david@xxxxxxxxx> wrote:

> On 12/31/06, Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote:
>> All that's missing is the balloon driver itself (but the PV Linux one could
>> be used as a basis), support for using the memory-reservation hypercall from
>> HVM context, and a way to blow away qemu's memory-mapping cache when memory
>> is given back to Xen from the HVM guest.
> If you plan to not modify the HVM, Is there a way to make portions of
> physical memory unusable for a HVM windows from the hypervisor in a
> dynamic way?

In a way that is detectable by the guest OS in a way that causes it to react
in a reasonable way? Unlikely, since there is no equivalent of this on a
native x86 platform.

 -- Keir

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