libvirt fails to start domain in non-default resource partition
Observed on hawk, sometimes the isolated domain buzzard fails to start citing:
Sep 08 13:38:49 hawk libvirtd[8911]: cannot set CPU affinity on process 13141: Invalid argument
Sep 08 13:38:49 hawk libvirtd[8911]: Unable to remove /sys/fs/cgroup/machine.slice/machine-qemu\x2d6\x2dbuzzard.scope/libvirt/vcpu0/ (16)libvirt is attempting to launch the domain under machine.slice, which shouldn't happen because the resource->partition setting is configured to use isolated.slice. Attempting to restart the domain, even after restarting libvirtd, does not help. It seems like it works after running systemctl daemon-reload.