Am 19.12.2019 um 19:36 hat Max Reitz geschrieben:
> The "migration completed" event may be sent (on the source, to be
> specific) before the migration is actually completed, so the VM runstate
> will still be "finish-migrate" instead of "postmigrate". So ask the
> users of VM.wait_migration() to specify the final runstate they desire
> and then poll the VM until it has reached that state. (This should be
> over very quickly, so busy polling is fine.)
>
> Without this patch, I see intermittent failures in the new iotest 280
> under high system load. I have not yet seen such failures with other
> iotests that use VM.wait_migration() and query-status afterwards, but
> maybe they just occur even more rarely, or it is because they also wait
> on the destination VM to be running.
>
> Signed-off-by: Max Reitz <mre...@redhat.com>
> diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
> index 13fd8b5cd2..0b62c42851 100644
> --- a/tests/qemu-iotests/iotests.py
> +++ b/tests/qemu-iotests/iotests.py
> @@ -668,12 +668,16 @@ class VM(qtest.QEMUQtestMachine):
> }
> ]))
>
> - def wait_migration(self):
> + def wait_migration(self, expect_runstate):
> while True:
> event = self.event_wait('MIGRATION')
> log(event, filters=[filter_qmp_event])
> if event['data']['status'] == 'completed':
> break
> + # The event may occur in finish-migrate, so wait for the expected
> + # post-migration runstate
That's a bit too specific now that you have expect_runstate.
> + while self.qmp('query-status')['return']['status'] !=
> expect_runstate:
> + pass
>
> def node_info(self, node_name):
> nodes = self.qmp('query-named-block-nodes')
Tested-by: Kevin Wolf <kw...@redhat.com>
