Dear Team, We are using Openstack-Train in our organization.We have created windows server 2016 Std R2 instances with this flavor m5.xlarge ( RAM - 65536 , Disk - 500 , VCPUs - 16 ).Once Hyper-V future enabled in this instances VCPU count is automatically reduced to 1 core after restart.Even we have enabled nested virtualisation in openstack compute server.Herewith attached screenshot for your references.Please help us to short out this issue. #cat /sys/module/kvm_intel/parameters/nested Y Regards, Sysadmin. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-discuss/attachments/20200807/44c0c2dd/attachment-0001.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: Before Hyper-V.bmp Type: application/octet-stream Size: 2306502 bytes Desc: not available URL: <http://lists.openstack.org/pipermail/openstack-discuss/attachments/20200807/44c0c2dd/attachment-0001.obj> -------------- next part -------------- A non-text attachment was scrubbed... Name: After Hyper-V .png Type: image/png Size: 47337 bytes Desc: not available URL: <http://lists.openstack.org/pipermail/openstack-discuss/attachments/20200807/44c0c2dd/attachment-0001.png>