Since the update from kernel-2.6.32-754.2.1.el6.x86_64 to kernel-2.6.32-754.3.5.el6.x86_64 I can not boot my KVM guests anymore!? The workstation panics immediately!
I would not have expected this behavior now (last phase of OS). It was very robust until now (Optiplex Workstation). I see some KVM related lines in the changelog.diff. Before swimming upstream:
Does some one have problems related to KVM with kernel-2.6.32-754.3.5.el6.x86_64 ??
Is there any chance that this is related? Could you try downgrading qemu-img/qemu-kvm and see if it helps?
https://bugs.centos.org/view.php?id=15067
Regards, Simon