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Now that qemuDomainDetectVcpuPids is able to refresh the vCPU pid information it can be reused in the hotplug and hotunplug code paths rather than open-coding a very similar algorithm. A slight algorithm change is necessary for unplug since the vCPU needs to be marked offline prior to calling the thread detector function and eventually rolled back if something fails.
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>