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Normal practice is for cgroups controllers to be mounted at /sys/fs/cgroup. When setting up a container, /sys is mounted with a new sysfs instance, thus we must re-mount all the cgroups controllers. The complexity is that we must mount them in the same layout as the host OS. ie if 'cpu' and 'cpuacct' were mounted at the same location in the host we must preserve this in the container. Also if any controllers are co-located we must setup symlinks from the individual controller name to the co-located mount-point Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>