Leon Fauster via CentOS writes: > 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 ?? Yes, the exact same thing happened here, and I suspect it is related to older cpus that don't get any Spectre/Meltdown updates. IBM x3250 Intel(R) Xeon(R) CPU E3110 @ 3.00GHz This is a dual-core cpu of similar vintage to yours (can we have a model #?), pre-2010. There goes a cheap and reliable VM dev machine :-/