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71d2c172ed
If the stats for a block device can't be acquired from qemu we've fallen back to loading them from the file on the disk in libvirt. If qemu is not cooperating due to being stuck on an inaccessible NFS share we would then attempt to read the files and get stuck too with the VM object locked. All other APIs would eventually get stuck waiting on the VM lock. Avoid this problem by skipping the block stats if the VM is online but the monitor did not provide any stats. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1337073
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>