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Re: [Xen-devel] Xen memory management

To: David Xu <davidxu06@xxxxxxxxx>
Subject: Re: [Xen-devel] Xen memory management
From: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Date: Thu, 23 Jun 2011 10:27:11 +0100
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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Hi David, 

At 18:59 -0400 on 22 Jun (1308769177), David Xu wrote:
> Is there anybody who has some experience at memory management of Xen? I just
> want to know whether Xen hypervisor will map memory from different VMs to
> the same physical memory address

Yes; see page-sharing, grant tables, privileged foreign mappings &c. 

>, which is insecure.

Not if you do it right. :)  What exactly is your concern?


Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, Xen Platform Team
Citrix Systems UK Ltd.  (Company #02937203, SL9 0BG)

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