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https://issues.apache.org/jira/browse/CLOUDSTACK-8353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15628556#comment-15628556
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Rajani Karuturi commented on CLOUDSTACK-8353:
---------------------------------------------

I think the connecting bit is commented. you might have to uncomment code at 
https://github.com/apache/cloudstack/blob/master/plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java#L1976-L1982

> Including windows guest performance improvement flags like hv_vapic and 
> hv_spinlock in CCP
> ------------------------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-8353
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-8353
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the 
> default.) 
>          Components: KVM
>    Affects Versions: 4.5.0
>            Reporter: Bharat Kumar
>
> There is a bug in KVM that causes a BSOD for Windows 2008 R2 and 7 or 
> earlier. fix was added in libvirt 1.1.1 The fix requires enabling the 
> "hv_relaxed" option for the affected VMs. 



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