Something strange is going on in one of my virtual machines. I was fooling
around with defining events, creating and deleting sessions, etc., and now the
list of kernel tracepoints (lttng list -k) contains several entries where the
loglevel reads a corrupt value. Specifically:
skb_consume (loglevel: <<UNKNOWN>> (577)) (type:tracepoint)
skb_copy_datagram_iovec (loglevel: <<UNKNOWN>> (1140980544))
(type:tracepoint)
sched_switch (loglevel: <<UNKNOWN>> (6647407)) (type:tracepoint)
sched_migrate_task (loglevel: <<UNKNOWN>> (1140883008)) (type:tracepoint)
sched_process_free (loglevel: <<UNKNOWN>> (51088)) (type:tracepoint)
regulator_enable (loglevel: <<UNKNOWN>> (1140998064)) (type:tracepoint)
regulator_enable_delay (loglevel: <<UNKNOWN>> (1140998080))
(type:tracepoint)
power_machine_suspend (loglevel: <<UNKNOWN>> (52)) (type:tracepoint)
None of these events were the subject of kprobe or kretprobe events, except
maybe sched_switch.
This weirdness went away after a restart of lttng-sessiond. I've saved the
VM with this corrupt system in case anyone wants to investigate.
Daniel U. Thibault
Protection des systèmes et contremesures (PSC) | Systems Protection &
Countermeasures (SPC)
Cyber sécurité pour les missions essentielles (CME) | Mission Critical Cyber
Security (MCCS)
R & D pour la défense Canada - Valcartier (RDDC Valcartier) | Defence R&D
Canada - Valcartier (DRDC Valcartier)
2459 route de la Bravoure
Québec QC G3J 1X5
CANADA
Vox : (418) 844-4000 x4245
Fax : (418) 844-4538
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Gouvernement du Canada | Government of Canada
<http://www.valcartier.drdc-rddc.gc.ca/>
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