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| author | Stefan Hajnoczi <stefanha@redhat.com> | 2018-03-05 15:59:26 +0000 |
|---|---|---|
| committer | Max Reitz <mreitz@redhat.com> | 2018-03-09 15:40:07 +0100 |
| commit | 21794244d4e9c5f81132e4574e5bd10ef5066715 (patch) | |
| tree | 7952b5184f08ee1bb0b1fa72d3643d08db1641ea /tests/qemu-iotests | |
| parent | 39eaefcedb9af9131543e6b35386627780ac3f41 (diff) | |
| download | qemu-21794244d4e9c5f81132e4574e5bd10ef5066715.zip | |
qemu-iotests: fix 203 migration completion race
There is a race between the test's 'query-migrate' QMP command after the
QMP 'STOP' event and completing the migration:
The test case invokes 'query-migrate' upon receiving 'STOP'. At this
point the migration thread may still be in the process of completing.
Therefore 'query-migrate' can return 'status': 'active' for a brief
window of time instead of 'status': 'completed'. This results in
qemu-iotests 203 hanging.
Solve the race by enabling the 'events' migration capability, which
causes QEMU to emit migration-specific QMP events that do not suffer
from this race condition. Wait for the QMP 'MIGRATION' event with
'status': 'completed'.
Reported-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20180305155926.25858-1-stefanha@redhat.com
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'tests/qemu-iotests')
| -rwxr-xr-x | tests/qemu-iotests/203 | 15 | ||||
| -rw-r--r-- | tests/qemu-iotests/203.out | 5 |
2 files changed, 16 insertions, 4 deletions
diff --git a/tests/qemu-iotests/203 b/tests/qemu-iotests/203 index 2c811917d8..4874a1a0d8 100755 --- a/tests/qemu-iotests/203 +++ b/tests/qemu-iotests/203 @@ -49,11 +49,18 @@ with iotests.FilePath('disk0.img') as disk0_img_path, \ node_name='drive1-node', iothread='iothread0', force=True)) + iotests.log('Enabling migration QMP events...') + iotests.log(vm.qmp('migrate-set-capabilities', capabilities=[ + { + 'capability': 'events', + 'state': True + } + ])) + iotests.log('Starting migration...') iotests.log(vm.qmp('migrate', uri='exec:cat >/dev/null')) while True: - vm.get_qmp_event(wait=60.0) - result = vm.qmp('query-migrate') - status = result.get('return', {}).get('status', None) - if status == 'completed': + event = vm.event_wait('MIGRATION') + iotests.log(event, filters=[iotests.filter_qmp_event]) + if event['data']['status'] == 'completed': break diff --git a/tests/qemu-iotests/203.out b/tests/qemu-iotests/203.out index 3f1ff900e4..1a11f0975c 100644 --- a/tests/qemu-iotests/203.out +++ b/tests/qemu-iotests/203.out @@ -2,5 +2,10 @@ Launching VM... Setting IOThreads... {u'return': {}} {u'return': {}} +Enabling migration QMP events... +{u'return': {}} Starting migration... {u'return': {}} +{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'setup'}, u'event': u'MIGRATION'} +{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'active'}, u'event': u'MIGRATION'} +{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'completed'}, u'event': u'MIGRATION'} |