I think I've managed to fix my kvm issues by putting libvirtd into the libvirt
cgroup:
/etc/sysconfig/libvirtd:\
...
# cgroups
CGROUP_DAEMON="cpu:/libvirt memory:/libvirt blkio:/libvirt"
I think the host was just getting swamped by all of the guest activity.
Putting all the VMs is a single cgroup seems to keep things in line.
--
Orion Poplawski
Technical Manager 303-415-9701 x222
NWRA/CoRA Division FAX: 303-415-9702
3380 Mitchell Lane [log in to unmask]
Boulder, CO 80301 http://www.cora.nwra.com