[libvirt] [PATCH 0/3] Make access to virCapsPtr threadsafe in QEMU

[Daniel P. Berrange]

The 'caps' object in virQEMUDriverPtr can be re-created at any
time, so currently any access is protected by the 'driver'
lock. This is really bad for concurrency, since the 'caps'
object is used all over the place. This series refactors the
QEMU driver so that this is a reference counted object. The
lock is now only required while obtaining a reference to the
object. This will let us remove the QEMU driver lock from much
code in the future.