Merge pull request #519 from CongSmile/balloon_hotplug

tp-qemu: Add case for balloon hotplug.

qemu/tests/balloon_hotplug.py

+import logging
+import time
+
+from virttest.qemu_devices import qdevices
+from virttest import error_context
+from qemu.tests import balloon_check
+from avocado.core import exceptions
+
+
+@error_context.context_aware
+def run(test, params, env):
+    """
+    Test hotplug of balloon devices.
+
+    1) Boot up guest w/o balloon device.
+    2) Hoplug balloon device and check hotplug successfully or not.
+    3) Do memory balloon.
+    4) Unplug balloon device and check unplug successfully or not.
+
+    :param test:   QEMU test object.
+    :param params: Dictionary with the test parameters.
+    :param env:    Dictionary with test environment.
+    """
+    pause = float(params.get("virtio_balloon_pause", 3.0))
+    idx = 0
+    err = ""
+    vm = env.get_vm(params["main_vm"])
+    vm.verify_alive()
+
+    error_context.context("Hotplug and unplug balloon device in a loop",
+                          logging.info)
+    for i in xrange(int(params.get("balloon_repeats", 3))):
+        vm.devices.set_dirty()
+        new_dev = qdevices.QDevice("virtio-balloon-pci",
+                                   {'id': 'balloon%d' % idx},
+                                   parent_bus={'aobject': 'pci.0'})
+
+        error_context.context("Hotplug balloon device for %d times" % (i+1),
+                              logging.info)
+        out = new_dev.hotplug(vm.monitor)
+        if out:
+            err += "\nHotplug monitor output: %s" % out
+        # Pause
+        time.sleep(pause)
+        ver_out = new_dev.verify_hotplug(out, vm.monitor)
+        if not ver_out:
+            err += ("\nDevice is not in qtree %ss after hotplug:\n%s"
+                    % (pause, vm.monitor.info("qtree")))
+
+        error_context.context("Check whether balloon device work after hotplug",
+                              logging.info)
+        balloon_check.run(test, params, env)
+
+        error_context.context("Unplug balloon device for %d times" % (i+1),
+                              logging.info)
+        out = new_dev.unplug(vm.monitor)
+        if out:
+            err += "\nUnplug monitor output: %s" % out
+        # Pause
+        time.sleep(pause)
+        ver_out = new_dev.verify_unplug(out, vm.monitor)
+        if not ver_out:
+            err += ("\nDevice is still in qtree %ss after unplug:\n%s"
+                    % (pause, vm.monitor.info("qtree")))
+
+        if err:
+            logging.error(vm.monitor.info("qtree"))
+            raise exceptions.TestFail("Error occurred while hotpluging "
+                                      "virtio-pci. Iteration %s, monitor "
+                                      "output:%s" % (i, err))

qemu/tests/cfg/balloon_hotplug.cfg

+- balloon_hotplug: install setup image_copy unattended_install.cdrom
+    virt_test_type = qemu libvirt
+    type = balloon_hotplug
+    monitor_type = qmp
+    monitors = qmp1
+    balloon_repeats = 5
+    virtio_balloon_pause = 10.0
+    free_mem_cmd = cat /proc/meminfo |grep MemFree
+    Linux:
+        ratio = 1
+    Windows:
+        ratio = 0.5
+    run_sub_test_after_balloon = no
+    test_tags = "evict enlarge"
+    balloon_type_evict = evict
+    balloon_type_enlarge = enlarge