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Setting pinning policy for vcpu which exceeds current vcpus number just makes no sense, however, it could cause various problems, E.g. <vcpu current='1'>4</vcpu> <cputune> <vcpupin vcpuid='3' cpuset='4'/> </cputune> % virsh start linux error: Failed to start domain linux error: cannot set CPU affinity on process 32534: No such process We must have some odd codes underlying which produces the "on process 32534", but the point is why we not to prevent earlier when parsing? Note that this is only one of the problem it could cause. This patch is to ignore the <vcpupin> for not onlined vcpus.
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>