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41b2cee2a8
When we mount any cgroup without "-o devices", we will fail to start vms: error: Failed to start domain vm1 error: Unable to deny all devices for vm1: No such file or directory When we mount any cgroup without "-o cpu", we will fail to get schedinfo: Scheduler : posix error: unable to get cpu shares tunable: No such file or directory We should only use the cgroup controllers which are mounted on host. So I add virCgroupMounted() for qemuCgroupControllerActive() Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.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>