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Re: [Xen-devel] [PATCH] x86/PAE partially linear page table support

  • To: Jan Beulich <jbeulich@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir@xxxxxxxxxxxxx>
  • Date: Thu, 15 Feb 2007 10:25:47 +0000
  • Delivery-date: Thu, 15 Feb 2007 02:25:14 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcdQ66gI5r3Wy7zeEdu/0gAX8io7RQ==
  • Thread-topic: [Xen-devel] [PATCH] x86/PAE partially linear page table support

How do you ensure that circular references are correctly cleaned up at
domain destruction time? (i.e., A references B and B references A).

We have special destructore code to clean up all root pagetable references,
but the code isn't there for lower levels.

 -- Keir

On 15/2/07 09:41, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

> While full linear page table support makes little sense (and would be more
> complicated to implement), partial linear page table support is almost
> identical
> to that in non-PAE, and is used (at least) by NetWare.
> Of course, the question here is whether this shouldn't be generalized - all
> validated page tables (except for top level PAE) could be allowed to be
> installed
> at lower levels using the same scheme.
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

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