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Bug
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Resolution: Unresolved
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Normal
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None
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rhel-10.2
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None
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Moderate
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rhel-virt-core-live-migration
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None
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QE ack
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False
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False
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None
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Red Hat Enterprise Linux
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None
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None
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Yes
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Unspecified
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Unspecified
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Unspecified
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All
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Unspecified
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None
What were you trying to do that didn't work?
Do multifd migration, cancel migration during migration is active;
Restart multifd migration, sometimes hit no response when conduct "query-migrate"
Please provide the package NVR for which bug is seen:
hosts info: kernel-6.12.0-191.el10.s390x && qemu-kvm-10.1.0-11.el10.s390x
guest info: kernel-6.12.0-191.el10.s390x
How reproducible:
3/100
Steps to reproduce
1.Boot a VM on src host
2.Boot a VM on dst host with appending "-incoming defer"
3.Enable multifd capability on src and dst host, set migration speed to 1M, multifd-channels to 4
4.Start migration, during migration is active, cancel migration
5.Restart a VM on dst host with appending "-incoming defer"
6.Set multifd-channels to 2 in src qemu
7.Enable multifd capability on dst host
8.Change migration speed to 100M
9.Migrate VM from src to dst host
Expected results
Migration finishes, VM works well after migration
Actual results
Check migration statistics via "query-migrate" qmp cmd after step 9.
Sometimes no response when conduct "query-migrate":
2026-01-28-07:26:46: Host(10.0.160.47) Sending qmp command :{"execute": "query-migrate", "id": "Y8SA9zVU"}
2026-01-28-07:26:46: Host(10.0.160.47) Responding qmp command: {"return": {"expected-downtime": 300, "status": "active", "setup-time": 26, "total-time": 523, "ram": {"total": 4294967296, "postcopy-requests": 0, "dirty-sync-count": 1, "multifd-bytes": 68123328, "pages-per-second": 28160, "downtime-bytes": 0, "page-size": 4096, "remaining": 4226281472, "postcopy-bytes": 0, "mbps": 925.11375999999996, "transferred": 68123540, "dirty-sync-missed-zero-copy": 0, "precopy-bytes": 48, "duplicate": 180, "dirty-pages-rate": 0, "normal-bytes": 67944448, "normal": 16588}}, "id": "Y8SA9zVU"}
...
2026-01-28-07:26:48: Host(10.0.160.47) Sending qmp command :{"execute": "query-migrate", "id": "quitSb2U"}
Traceback (most recent call last):
File "/home/ipa/runner.py", line 216, in _run
getattr(self._case_dict[case], "run_case")(self._params)
File "/home/ipa/virtkvmqe/migration_test_plan/multiple_fds/test_scenarios/RHEL_186122.py", line 218, in run_case
run_sub_case()
File "/home/ipa/virtkvmqe/migration_test_plan/multiple_fds/test_scenarios/RHEL_186122.py", line 161, in run_sub_case
do_migration(src_remote_qmp, incoming_port, dst_host_ip, src_qemu_pid,
File "/home/ipa/virtkvmqe/migration_test_plan/multiple_fds/test_scenarios/RHEL_186122.py", line 44, in do_migration
if output['status'] == 'completed':
~~~~~~^^^^^^^^^^
TypeError: 'NoneType' object is not subscriptable
Note:
- Sometimes hit this issue when multifd migration completed. In this scenario, VM works well after migration, only get the above error;
- Sometimes hit this issue when multifd migration is active. In this scenario, VM works at the source side, but the dst qemu has been quitted
