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Re: [Xen-devel] query on physical memory map for Xen?

  • To: pradeep singh rautela <rautelap@xxxxxxxxx>
  • From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
  • Date: Fri, 11 Apr 2008 08:27:35 +0100
  • Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Fri, 11 Apr 2008 00:28:13 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcibpYMDwXexPgeYEd2suwAWy6hiGQ==
  • Thread-topic: [Xen-devel] query on physical memory map for Xen?

On 11/4/08 08:13, "pradeep singh rautela" <rautelap@xxxxxxxxx> wrote:

>>  32-bit Xen does not use memory above 16GB at all. 64-bit Xen can use any
>>  amount of memory, and is able to keep a permanent mapping of all of it.
> Thanks for the reply Keir.
> Is that a deliberate feature or a limitation of Xen hypervisor?

It's a limitation due to the way that 32-bit Xen handles memory management.
We don't intend to lift the restriction since users are better off moving to
64-bit Xen.

 -- Keir

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