Public bug reported:
== Comment: #0 - Sneh Shikha Yadav <[email protected]> - 2026-01-27
22:45:28 ==
---Problem Description---
vm fails to start with memory hot plug ,error :operation failed: Failed to
query numad for the advisory nodeset"
Host ENV:
OS : ubuntu26.04
kernel : 6.18.0-8-generic
libvirt : libvirtd (libvirt) 11.6.0
qemu : QEMU emulator version 10.1.0 (Debian 1:10.1.0+ds-5ubuntu4)
Guest ENV:
OS : Ubuntu26.04
kernel : 6.18.0-8-generic
---Steps to Reproduce---
1. Bringup the guest with 24Gb
# vm.xml
.
.
<maxMemory slots='16' unit='KiB'>30641536</maxMemory>
.
.
.
<numa>
<cell id='0' cpus='0-11' memory='12320768' unit='KiB'/>
<cell id='1' cpus='12-23' memory='12320768' unit='KiB'/>
</numa>
2. virsh start avocado-vt-vm1
error: Failed to start domain 'avocado-vt-vm1'
error: operation failed: Failed to query numad for the advisory nodeset
== Comment: #5 - Sneh Shikha Yadav <[email protected]> - 2026-01-27
23:07:44 ==
(In reply to comment #3)
> Created attachment 164707 [details]
> numad service logs
# systemctl start numad.service
Job for numad.service failed because a fatal signal was delivered causing the
control process to dump core.
See "systemctl status numad.service" and "journalctl -xeu numad.service" for
details.
# systemctl status numad.service
? numad.service - numad - The NUMA daemon that manages application locality.
Loaded: loaded (/usr/lib/systemd/system/numad.service; enabled; preset:
enabled)
Active: failed (Result: signal) since Tue 2026-01-06 15:28:49 UTC; 18h ago
Invocation: 7435696efd754c3984d43d4c2a0f8237
Docs: man:numad
Process: 2448 ExecStart=/usr/bin/numad $DAEMON_ARGS -i 15 (code=killed,
signal=ABRT)
Mem peak: 8M
CPU: 3ms
Jan 06 15:28:49 ltcden6-lp8 systemd[1]: Starting numad.service - numad - The
NUMA daemon>
Jan 06 15:28:49 ltcden6-lp8 numad[2448]: *** buffer overflow detected ***:
terminated
Jan 06 15:28:49 ltcden6-lp8 systemd[1]: numad.service: Control process exited,
code=kill>
Jan 06 15:28:49 ltcden6-lp8 systemd[1]: numad.service: Failed with result
'signal'.
Jan 06 15:28:49 ltcden6-lp8 systemd[1]: Failed to start numad.service - numad -
The NUMA>
root@ltcden6-lp8:/home/tests# systemctl status numad.service
? numad.service - numad - The NUMA daemon that manages application locality.
Loaded: loaded (/usr/lib/systemd/system/numad.service; enabled; preset:
enabled)
Active: failed (Result: core-dump) since Wed 2026-01-07 09:49:40 UTC; 1min
21s ago
Invocation: 4968ad3224d54e6899f8a42e18830a5b
Docs: man:numad
Process: 23301 ExecStart=/usr/bin/numad $DAEMON_ARGS -i 15 (code=dumped,
signal=ABRT)
Mem peak: 12M
CPU: 4ms
Jan 07 09:49:40 ltcden6-lp8 systemd[1]: Starting numad.service - numad - The
NUMA daemon that manages application locality....
Jan 07 09:49:40 ltcden6-lp8 numad[23301]: *** buffer overflow detected ***:
terminated
Jan 07 09:49:40 ltcden6-lp8 systemd[1]: numad.service: Control process exited,
code=dumped, status=6/ABRT
Jan 07 09:49:40 ltcden6-lp8 systemd[1]: numad.service: Failed with result
'core-dump'.
Jan 07 09:49:40 ltcden6-lp8 systemd[1]: Failed to start numad.service - numad -
The NUMA daemon that manages application locality..
** Affects: qemu (Ubuntu)
Importance: Undecided
Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage)
Status: New
** Tags: architecture-ppc64le bugnameltc-217120 severity-high
targetmilestone-inin---
** Tags added: architecture-ppc64le bugnameltc-217120 severity-high
targetmilestone-inin---
** Changed in: ubuntu
Assignee: (unassigned) => Ubuntu on IBM Power Systems Bug Triage
(ubuntu-power-triage)
** Package changed: ubuntu => qemu (Ubuntu)
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https://bugs.launchpad.net/bugs/2139262
Title:
[Ubuntu26.04] [FW1110] : vm fails to start with memory hot plug ,error
:operation failed: Failed to query numad for the advisory nodeset
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