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4b951d1e38
External disk-only snapshots with recent enough qemu don't require libvirt to pause the VM. The logic determining when to resume cpus was slightly flawed and attempted to resume them even if they were not paused by the snapshot code. This normally was not a problem, but with locking enabled the code would attempt to acquire the lock twice. The fallout of this bug would be a error from the API, but the actual snapshot being created. The bug was introduced with when adding support for external snapshots with memory (checkpoints) in commit f569b87. Resolves problems described by: https://bugzilla.redhat.com/show_bug.cgi?id=1403691
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>