def run(test, params, env):
"""
Balloon negative test, balloon windows guest memory to very small value.
1) boot a guest with balloon device.
2) enable and check driver verifier in guest.
3) evict guest memory to 10M.
4) repeat step 3 for many times.
5) check guest free memory.
:param test: QEMU test object.
:param params: Dictionary with the test parameters.
:param env: Dictionary with test environment.
"""
error_context.context("Boot guest with balloon device", logging.info)
vm = env.get_vm(params["main_vm"])
session = vm.wait_for_login()
driver_name = params.get("driver_name", "balloon")
session = utils_test.qemu.windrv_check_running_verifier(session, vm,
test, driver_name)
balloon_test = BallooningTestWin(test, params, env)
expect_mem = int(params["expect_memory"])
balloon_test.pre_mem = balloon_test.get_ballooned_memory()
balloon_test.pre_gmem = balloon_test.get_memory_status()
repeat_times = int(params.get("repeat_times", 10))
while repeat_times:
try:
balloon_test.vm.balloon(expect_mem)
except QMPEventError:
pass
balloon_test._balloon_post_action()
time.sleep(30)
repeat_times -= 1
ballooned_memory = expect_mem - balloon_test.pre_mem
balloon_test.memory_check("after balloon guest memory 10 times", ballooned_memory)
session.close()
