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[Xen-devel] Tracking guest pages modified by qemu-dm / backend

  • To: xen-devel@xxxxxxxxxxxxxxxxxxx
  • From: AP <apxeng@xxxxxxxxx>
  • Date: Tue, 21 Jun 2011 15:43:26 -0700
  • Delivery-date: Tue, 21 Jun 2011 15:44:02 -0700
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  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

Consider an HVM domain with EPT. When qemu-dm, backend or any other
device model modifies DomU memory (like on a disk read or packet
received), how does Xen track the pages that have been modified? For
example, when an DomU is being migrated while IO is occurring.


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