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[Xen-devel] MFN & Page Mapping

  • To: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Kumar, Venkat" <Venkat.Kumar@xxxxxxx>
  • Date: Tue, 18 Nov 2008 19:28:14 +0530
  • Accept-language: en-US
  • Acceptlanguage: en-US
  • Delivery-date: Tue, 18 Nov 2008 05:58:55 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AclJhbNPDpMych5gSVawXXNEcIsvPA==
  • Thread-topic: MFN & Page Mapping

When I share a page between a HVM domain (who offers the page) and a PV domain (who maps the page), I realized that the MFN (machine frame number) of the shared page in both these domains are different.

When I do virt_to_mfn on both the domains I get a different machine frame number. Is it expected or is the page really getting shared? I could see the contents of the page identical from both the domains.

 

Any clues?

 

Thx,

Venkat

 

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