qemu: Fix updating balloon period in live XML

Up until now, we set memballoon period in monitor successfully, however
we did not update domain definition structure, thus dumpxml was omitting
period attribute in memballoon element

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1140960

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 421faa23016bf338966e7f834b0a2b3acb7de6ec..7c0999871eb8cf0239277e995213f0d05b772c07 100644 (file)
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -2460,9 +2460,15 @@ static int qemuDomainSetMemoryStatsPeriod(virDomainPtr dom, int period,
         qemuDomainObjEnterMonitor(driver, vm);
         r = qemuMonitorSetMemoryStatsPeriod(priv->mon, period);
         qemuDomainObjExitMonitor(driver, vm);
-        if (r < 0)
+        if (r < 0) {
             virReportError(VIR_ERR_OPERATION_INVALID, "%s",
                            _("unable to set balloon driver collection period"));
+            goto endjob;
+        }
+
+        vm->def->memballoon->period = period;
+        if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
+            goto endjob;
     }
 
     if (flags & VIR_DOMAIN_AFFECT_CONFIG) {