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Re: [Xen-devel] Running a VM with more than 4GB?

  • To: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
  • From: Tom Rotenberg <tom.rotenberg@xxxxxxxxx>
  • Date: Sat, 24 Oct 2009 20:54:32 +0200
  • Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Sat, 24 Oct 2009 11:54:57 -0700
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Sounds great... so, it should work out of the box, right?
(I still haven't tested it, as i need to get me a physical machine
with enough amount of RAM)

On Sat, Oct 24, 2009 at 8:20 PM, Keir Fraser <keir.fraser@xxxxxxxxxxxxx> wrote:
> On 24/10/2009 19:09, "Tom Rotenberg" <tom.rotenberg@xxxxxxxxx> wrote:
>> Is it possible to run a VM on top of Xen with RAM >= 4gb? This should
>> cause all the iomem of the devices (both virtual & PT devices) to be
>> in addresses above 4gb, which means that it will be addresses of
>> 64-bit.
>> Does the latest Xen (and/or Xen 3.4) support this?
> Yes, it works. Iomem is placed just below 4gb and the RAM that would appear
> there is shifted up above 4GB, just like on a real machine.
>  -- Keir

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