noble:linux-azure instance
$ systemctl status hv-kvp-daemon.service
● hv-kvp-daemon.service - Hyper-V KVP Protocol Daemon
Loaded: loaded (/usr/lib/systemd/system/hv-kvp-daemon.service; enabled;
preset: enabled)
Active: active (running) since Tue 2025-02-04 20:38:21 UTC; 1min 42s ago
Main PID: 357 (hv_kvp_daemon)
Tasks: 1 (limit: 4688)
Memory: 2.5M (peak: 3.6M)
CPU: 60ms
CGroup: /system.slice/hv-kvp-daemon.service
└─357 /usr/lib/linux-tools/6.8.0-1022-azure/hv_kvp_daemon -n
Feb 04 20:38:21 john-cabaj-azure-lp-test-noblew-kcp systemd[1]: Started
hv-kvp-daemon.service - Hyper-V KVP Protocol Daemon.
Feb 04 20:38:21 john-cabaj-azure-lp-test-noblew-kcp KVP[357]: KVP starting; pid
is:357
Feb 04 20:38:21 john-cabaj-azure-lp-test-noblew-kcp KVP[357]: KVP LIC Version:
3.1
noble:linux instance
$ systemctl status hv-kvp-daemon.service
Unit hv-kvp-daemon.service could not be found.
oracular:linux-azure instance
$ systemctl status hv-kvp-daemon.service
● hv-kvp-daemon.service - Hyper-V KVP Protocol Daemon
Loaded: loaded (/usr/lib/systemd/system/hv-kvp-daemon.service; enabled;
preset: enabled)
Active: active (running) since Tue 2025-02-04 21:09:10 UTC; 19s ago
Invocation: 853cde405fa54f759222a26d1115a89a
Main PID: 347 (hv_kvp_daemon)
Tasks: 1 (limit: 4688)
Memory: 2.3M (peak: 3.2M)
CPU: 105ms
CGroup: /system.slice/hv-kvp-daemon.service
└─347 /usr/lib/linux-tools/6.11.0-1009-azure/hv_kvp_daemon -n
Feb 04 21:09:10 john-cabaj-lp-verify-oracular-azure-2-kcp systemd[1]: Started
hv-kvp-daemon.service - Hyper-V KVP Protocol Daemon.
Feb 04 21:09:11 john-cabaj-lp-verify-oracular-azure-2-kcp KVP[347]: KVP
starting; pid is:347
Feb 04 21:09:11 john-cabaj-lp-verify-oracular-azure-2-kcp KVP[347]: KVP LIC
Version: 3.1
oracular:linux instance
# systemctl status hv-kvp-daemon.service
Unit hv-kvp-daemon.service could not be found.
** Tags removed: verification-needed-noble-linux
verification-needed-oracular-linux
** Tags added: verification-done-noble-linux verification-done-oracular-linux
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/2091744
Title:
When /dev/vmbus/hv_kvp is not present, disable hv-kvp-daemon
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Noble:
Fix Committed
Status in linux source package in Oracular:
Fix Committed
Status in linux source package in Plucky:
Fix Released
Bug description:
SRU Justification
[Impact]
Re-opening for Noble, Oracular, and current development cycle (Plucky)
as this appears to have accidentally been dropped.
* Previous LP bug: https://bugs.launchpad.net/bugs/2024900
* Commit from Jammy release: https://git.launchpad.net/~ubuntu-
kernel/ubuntu/+source/linux/+git/jammy/commit/debian/linux-cloud-
tools-common.hv-kvp-daemon.service?h=master-
next&id=7da99ea3a1a745f6fd0c8632ef89573437888af6
* Previous mailing list discussion:
https://lists.ubuntu.com/archives/kernel-team/2023-June/140646.html
Following description copied from original LP bug:
If the daemon is started and the vmbus is not present it will just
exit with an error: https://git.launchpad.net/~ubuntu-
kernel/ubuntu/+source/linux/+git/mantic/tree/tools/hv/hv_kvp_daemon.c#n1424
Thus, it would make sense to add
"ConditionPathExists=/dev/vmbus/hv_kvp" in linux-cloud-tools-
common.hv-kvp-daemon.service to prevent systemd from starting the
daemon if the device is not there.
[Test Plan]
Start an Azure cloud instance and check for /dev/vmbus/hv_kvp and that
hv-kvp-daemon is running.
Start a non-Azure cloud instance and check that hv-kvp-daemon is not running.
[Regression potential]
Its possible that kv-hvp-daemon is not started when it should be.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2091744/+subscriptions
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