Hi Sanjay This look like limitation from the el9 side
https://www.phoronix.com/news/RHEL-9-x86-64-v2-Plans https://developers.redhat.com/blog/2021/01/05/building-red-hat-enterprise-linux-9-for-the-x86-64-v2-microarchitecture-level#recommendations_for_rhel_9 https://forums.rockylinux.org/t/rocky-linux-9-virtualbox-kernel-panic/6692/5 As a workaround, Please perform the following changes 1. Edit the file present on the kvm hosts “/etc/cloudstack/agent/agent.properties “ guest.cpu.mode=host-passthrough 2. Restart the agent service service cloudstack-agent restart --- Now to try to launch a new centos 9 stream vm from the ISO Regards Kiran From: Sanjay Kumar <sslinuxp...@gmail.com> Date: Wednesday, 2 August 2023 at 12:58 PM To: users@cloudstack.apache.org <users@cloudstack.apache.org>, d...@cloudstack.apache.org <d...@cloudstack.apache.org> Subject: Guest OS Rhel 9 and centos 9 going to kernel panic mode. Hello, We are facing strange issue with guest Os rhel 9 and centos 9 going to kernel panic mode while deploying the vm. ACS_Version: 4.18 KVM_Host: Rocky_Linux 8.8 Any help would be much appreciated Thanks, Sanjay Kumar