From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel.Thibault@drdc-rddc.gc.ca (Thibault, Daniel) Date: Wed, 20 Nov 2013 21:04:43 +0000 Subject: [lttng-dev] loglevel: <> Message-ID: <48CF5AC71E61DB46B70D0F388054EFFD267A2E4E@VAL-E-01.valcartier.drdc-rddc.gc.ca> 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: <> (577)) (type:tracepoint) skb_copy_datagram_iovec (loglevel: <> (1140980544)) (type:tracepoint) sched_switch (loglevel: <> (6647407)) (type:tracepoint) sched_migrate_task (loglevel: <> (1140883008)) (type:tracepoint) sched_process_free (loglevel: <> (51088)) (type:tracepoint) regulator_enable (loglevel: <> (1140998064)) (type:tracepoint) regulator_enable_delay (loglevel: <> (1140998080)) (type:tracepoint) power_machine_suspend (loglevel: <> (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 syst?mes et contremesures (PSC) | Systems Protection & Countermeasures (SPC) Cyber s?curit? pour les missions essentielles (CME) | Mission Critical Cyber Security (MCCS) R & D pour la d?fense Canada - Valcartier (RDDC Valcartier) | Defence R&D Canada - Valcartier (DRDC Valcartier) 2459 route de la Bravoure Qu?bec QC? G3J 1X5 CANADA Vox?: (418) 844-4000 x4245 Fax?: (418) 844-4538 NAC?: 918V QSDJ Gouvernement du Canada?| Government of Canada