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Re: [Xen-devel] Do we clear a page when it's allocated to a guest?

  • To: "Li, Xin B" <xin.b.li@xxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir@xxxxxxxxxxxxx>
  • Date: Wed, 29 Nov 2006 10:23:42 +0000
  • Delivery-date: Wed, 29 Nov 2006 02:23:52 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AccTkgAf0wNFQJ0kSFCQQsg0z/Rt1QADnEsI
  • Thread-topic: [Xen-devel] Do we clear a page when it's allocated to a guest?
No. Pages are expected to be cleared by a guest when it frees them if it
cares about secrecy. Also Xen will clear pages that belong to a guest when a
guest dies (since the guest is no longer around to do it for itself). But a
guest cannot assume pages it allocates are zeroed.

 -- Keir

On 29/11/06 08:40, "Li, Xin B" <xin.b.li@xxxxxxxxx> wrote:

> thanks
> -Xin
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel


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