qemu: save domain status after set memory parameters

After set memory parameters for running domain, save the change to live
xml is needed otherwise it will disappear after restart libvirtd.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1211548Signed-off-by: NShanzhi Yu <shyu@redhat.com>
Signed-off-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_driver.c

@@ -9843,6 +9843,10 @@ qemuDomainSetMemoryParameters(virDomainPtr dom,
 
 #undef QEMU_SET_MEM_PARAMETER
 
+    if (flags & VIR_DOMAIN_AFFECT_LIVE &&
+        virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
+        goto endjob;
+
     if (flags & VIR_DOMAIN_AFFECT_CONFIG &&
         virDomainSaveConfig(cfg->configDir, persistentDef) < 0)
         goto endjob;