Description of problem:
newest OSP 17.1/el9.2 compose deploys overcloud without problem but fails with the same 14 tempest tests, nova-compute  log shows:
2023-02-15 00:14:54.492 2 ERROR nova.compute.manager [instance: 98497067-8137-4ff3-aa1a-bca3393b1744] libvirt.libvirtError: internal error: Process exited prior to exec: libvirt: QEMU Driver error : failed to umount devfs on /dev: Device or resource busy

it's blocking all further (phase3) testing of 17.1, quite urgent

Version-Release number of selected component (if applicable):
core_puddle: RHOS-17.1-RHEL-9-20230214.n.1


How reproducible:
100%

Steps to Reproduce:
1. run any phase1/2 OSP17.1/el9.2 job with that compose
2.
3.

Actual results:
the same 14 tempest tests fail:
tempest.scenario.test_minimum_basic.TestMinimumBasicScenario.test_minimum_basic_instance_hard_reboot_after_vol_snap_deletion[compute,id-a8fd48ec-1d01-4895-b932-02321661ec1e,image,network,volume]	24 sec	2
 tempest.scenario.test_snapshot_pattern.TestSnapshotPattern.test_snapshot_pattern[compute,id-608e604b-1d63-4a82-8e3e-91bc665c90b4,image,network,slow]	25 sec	2
 tempest.scenario.test_network_basic_ops.TestNetworkBasicOps.test_connectivity_between_vms_on_different_networks[compute,id-1546850e-fbaa-42f5-8b5f-03d8a6a95f15,network,slow]	45 sec	2
 tempest.scenario.test_volume_boot_pattern.TestVolumeBootPattern.test_create_server_from_volume_snapshot[compute,id-05795fb2-b2a7-4c9f-8fac-ff25aedb1489,image,slow,volume]	35 sec	2
 tempest.scenario.test_minimum_basic.TestMinimumBasicScenario.test_minimum_basic_scenario[compute,id-bdbb5441-9204-419d-a225-b4fdbfb1a1a8,image,network,volume]	22 sec	2
 tempest.scenario.test_volume_boot_pattern.TestVolumeBootPattern.test_image_defined_boot_from_volume[compute,id-36c34c67-7b54-4b59-b188-02a2f458a63b,image,volume]	23 sec	2
 tempest.scenario.test_network_basic_ops.TestNetworkBasicOps.test_hotplug_nic[compute,id-c5adff73-e961-41f1-b4a9-343614f18cfa,network]	36 sec	2
 tempest.scenario.test_volume_boot_pattern.TestVolumeBootPattern.test_volume_boot_pattern[compute,id-557cd2c2-4eb8-4dce-98be-f86765ff311b,image,slow,volume]	24 sec	2
 tempest.scenario.test_network_basic_ops.TestNetworkBasicOps.test_mtu_sized_frames[compute,id-b158ea55-472e-4086-8fa9-c64ac0c6c1d0,network,slow]	33 sec	2
 tempest.scenario.test_network_basic_ops.TestNetworkBasicOps.test_network_basic_ops[compute,id-f323b3ba-82f8-4db7-8ea6-6a895869ec49,network,smoke]	31 sec	2
 tempest.scenario.test_network_basic_ops.TestNetworkBasicOps.test_preserve_preexisting_port[compute,id-759462e1-8535-46b0-ab3a-33aa45c55aaa,network,slow]	33 sec	2
 tempest.scenario.test_network_basic_ops.TestNetworkBasicOps.test_subnet_details[compute,id-d8bb918e-e2df-48b2-97cd-b73c95450980,network,slow]	31 sec	2
 tempest.scenario.test_network_basic_ops.TestNetworkBasicOps.test_update_instance_port_admin_state[compute,id-f5dfcc22-45fd-409f-954c-5bd500d7890b,network,slow]	31 sec	2
 tempest.scenario.test_network_basic_ops.TestNetworkBasicOps.test_update_router_admin_state[compute,id-04b9fe4e-85e8-4aea-b937-ea93885ac59f,network,slow]

Expected results:
passed tempest tests would be cool

Additional info:
I will have a machine to troubleshoot the problem live if needs be, ping me on irc/slack: wznoinsk