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[Xen-devel] Question on Lazy VM Restore

  • To: xen-devel@xxxxxxxxxxxxx
  • From: Prateek Sharma <prateeks@xxxxxxxxxxxx>
  • Date: Fri, 13 Dec 2013 11:06:47 -0500 (EST)
  • Delivery-date: Sat, 14 Dec 2013 14:58:40 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xen.org>

Hello all,
I was wondering if there is an existing mechanism in Xen for restoring a saved/checkpointed VM lazily. By that, I mean that the pages of the VM should be mapped only on access. Currently, restoring a VM from a snapshot seems to take a long time [~20 seconds for 2 GB]. Assuming that there is no lazy-restore functionality, what would be a good way to implement this? Using parts of Xen-paging? Snowflock? Something else?


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