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Re: [Xen-devel] "magic" pages like xenstore and console

  • To: Tim Wood <twwood@xxxxxxxxx>, Xen devel list <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
  • Date: Tue, 06 Feb 2007 21:37:16 +0000
  • Delivery-date: Tue, 06 Feb 2007 13:37:01 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcdKNvhuNzFetLYqEduj+wAX8io7RQ==
  • Thread-topic: [Xen-devel] "magic" pages like xenstore and console

On 6/2/07 21:25, "Tim Wood" <twwood@xxxxxxxxx> wrote:

> The DOM0_GETMEMLIST call gets a list of pages used by a domain by
> stepping through the "page_list" linked list stored in the "domain"
> struct.  I'm finding that in translated shadow mode, this list is one
> page shorter than it should be, and that the missing page is the one
> which immediately follows the console page.  So we have <...> <xen
> store> <console> <MISSING> <...>
> Anyone have an idea on what makes that page special and why it isn't
> included in the page_list as normal?

Probably it's the shared_info page. That and grant-table pages are allocated
from the 'Xen heap' and do not appear in getmemlist output.

 -- Keir

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