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Re: [Xen-devel] page_info structure in Xen

  • To: Carol Gao <carol.gao@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
  • Date: Tue, 08 Aug 2006 10:09:02 +0100
  • Delivery-date: Tue, 08 Aug 2006 02:09:27 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Aca6ykpWiM0pASa9EduaRAAKle7CWA==
  • Thread-topic: [Xen-devel] page_info structure in Xen


On 7/8/06 7:24 pm, "Carol Gao" <carol.gao@xxxxxxxxxx> wrote:

> In the file xen/include/asm-x86/mm.h, a "page_info" structure is
> defined.  I am wondering when the PGT_type is set to be PGT_none and
> when it is set to be  PGT_writable_page?

It is set to PGT_writable_page when any guest has a writable mapping of that
page. If the page is read only then it has type PGT_none.

 -- Keir



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