qemu_cgroup: put qemu right into emulator sub-cgroup

Move qemuProcessSetupEmulator up under qemuSetupCgroup. That way
we move the one main thread right into the emulator cgroup, instead
of moving multiple threads later on. And we do not actually want any
threads running in the parent cgroups (cpu cpuacct cpuset).
Signed-off-by: NHenning Schild <henning.schild@siemens.com>

src/qemu/qemu_process.c

@@ -5155,6 +5155,10 @@ qemuProcessLaunch(virConnectPtr conn,
         qemuProcessInitCpuAffinity(vm) < 0)
         goto cleanup;
 
+    VIR_DEBUG("Setting emulator tuning/settings");
+    if (qemuProcessSetupEmulator(vm) < 0)
+        goto cleanup;
+
     VIR_DEBUG("Setting domain security labels");
     if (virSecurityManagerSetAllLabel(driver->securityManager,
                                       vm->def,
@@ -5197,10 +5201,6 @@ qemuProcessLaunch(virConnectPtr conn,
     if (rv == -1) /* The VM failed to start */
         goto cleanup;
 
-    VIR_DEBUG("Setting emulator tuning/settings");
-    if (qemuProcessSetupEmulator(vm) < 0)
-        goto cleanup;
-
     VIR_DEBUG("Waiting for monitor to show up");
     if (qemuProcessWaitForMonitor(driver, vm, asyncJob, priv->qemuCaps, logCtxt) < 0)
         goto cleanup;