Re: [libvirt] [PATCH 2/2] Wire up handling for QMP's BALLOON_EVENT

From: "Daniel P. Berrange" <berrange(a)redhat.com&gt; If QEMU supports the BALLOON_EVENT QMP event, then we can avoid invoking 'query-balloon' when returning XML or the domain info. * src/qemu/qemu_capabilities.c, src/qemu/qemu_capabilities.h: Add QEMU_CAPS_BALLOON_EVENT * src/qemu/qemu_driver.c: Skip query-balloon in qemudDomainGetInfo and qemuDomainGetXMLDesc if we have QEMU_CAPS_BALLOON_EVENT set * src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h: Check for BALLOON_EVENT at connect to monitor. Add callback for balloon change notifications * src/qemu/qemu_monitor_json.c, src/qemu/qemu_monitor_json.h: Add handling of BALLOON_EVENT and impl 'query-events' check Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com&gt; --- src/qemu/qemu_capabilities.c | 2 + src/qemu/qemu_capabilities.h | 1 + src/qemu/qemu_driver.c | 7 ++++- src/qemu/qemu_monitor.c | 18 +++++++++++- src/qemu/qemu_monitor.h | 5 +++ src/qemu/qemu_monitor_json.c | 65 ++++++++++++++++++++++++++++++++++++++++++ src/qemu/qemu_monitor_json.h | 2 + src/qemu/qemu_process.c | 31 ++++++++++++++++++++ 8 files changed, 129 insertions(+), 2 deletions(-)

+ QEMU_CAPS_BALLOON_EVENT = 95, /* Async event for balloon changes */

+static void +qemuMonitorJSONHandleBalloonChange(qemuMonitorPtr mon, + virJSONValuePtr data) +{ + unsigned long long actual = 0; + if (virJSONValueObjectGetNumberUlong(data, "actual", &actual) < 0) { + VIR_WARN("missing actual in balloon change event"); + return; + } + actual = (actual/1024);