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[Xen-devel] hvm hibernate

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Subject: [Xen-devel] hvm hibernate
From: "Ky Srinivasan" <ksrinivasan@xxxxxxxxxx>
Date: Wed, 01 Apr 2009 12:44:53 -0600
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With the support of S4 sleep state (hibernate) for  HVM guests,  we now have a 
situation where the guest is resuming from hibernate while the hypervisor 
assumes that it is spinning up a new guest VM. And so, if the hypervisor 
maintains any guest specific state that needs to persist across a hibernate, 
there is no way to save and restore this state. I am running into this problem 
on win2k8 guests where the Hyperv shim has to maintain guest specific state 
that needs to persist across a hibernate.
Given that we already support save/restore which is functionally equivalent to 
hibernate, do we need to support S4 sleep state? 


K. Y

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