Dietmar, Ingo, Tejun, since commit cd92bfd3b8cb0ec2ee825e55a3aee704cd55aea9 sched/core: Store maximum per-CPU capacity in root domain
I get tons of messages from the scheduler like [..] span: 0-15 (max cpu_capacity = 589) span: 0-15 (max cpu_capacity = 589) span: 0-15 (max cpu_capacity = 589) span: 0-15 (max cpu_capacity = 589) [..] whenever I start kvm guests with libvirt. The reason seems to be that libvirt via systemd/machined tries to move all guest vcpus into its cpuset and for whatever reasons, the way it is done will always call rebuild_sched_domains from the cgroup code. While the message alone is somewhat of a nuisance, I think rebuilding the scheduling domains for moving kvm vcpus is really expensive. Tejun, do you have an idea whats going on here? Is libvirt using the cgroup interface wrong (e.g. also d a memory migrate or whatever) Christian
