1. 23 Jun, 2014 1 commit
  2. 19 Dec, 2012 4 commits
  3. 15 Jun, 2012 1 commit
    • Daniel P. Berrange's avatar
      Add event notification for guest balloon changes · 973603a8
      Daniel P. Berrange authored
      After setting a balloon target value, applications have to
      continually poll 'query-balloon' to determine whether the
      guest has reacted to this request. The virtio-balloon backend
      knows exactly when the guest has reacted though, and thus it
      is possible to emit a JSON event to tell the mgmt application
      whenever the guest balloon changes.
      
      This introduces a new 'qemu_balloon_changed()' API which is
      to be called by balloon driver backends, whenever they have
      a change in balloon value. This takes the 'actual' balloon
      value, as would be found in the BalloonInfo struct.
      
      The qemu_balloon_change API emits a JSON monitor event which
      looks like:
      
        {"timestamp": {"seconds": 1337162462, "microseconds": 814521},
         "event": "BALLOON_CHANGE", "data": {"actual": 944766976}}
      
      * balloon.c, balloon.h: Introduce qemu_balloon_changed() for
        emitting balloon change events on the monitor
      * hw/virtio-balloon.c: Invoke qemu_balloon_changed() whenever
        the guest changes the balloon actual value
      * monitor.c, monitor.h: Define QEVENT_BALLOON_CHANGE
      Signed-off-by: default avatarDaniel P. Berrange <berrange@redhat.com>
      Acked-by: default avatarAmit Shah <amit.shah@redhat.com>
      Signed-off-by: default avatarLuiz Capitulino <lcapitulino@redhat.com>
      973603a8
  4. 27 Apr, 2012 1 commit
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  10. 09 Sep, 2010 1 commit
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