log.txt

# mount -t tracefs nodev /sys/kernel/tracing
# cat /sys/kernel/tracing/trace
# tracer: function
#
# entries-in-buffer/entries-written: 6/6   #P:1
#
#                                _-----=> irqs-off/BH-disabled
#                               / _----=> need-resched
#                              | / _---=> hardirq/softirq
#                              || / _--=> preempt-depth
#                              ||| / _-=> migrate-disable
#                              |||| /     delay
#           TASK-PID     CPU#  |||||  TIMESTAMP  FUNCTION
#              | |         |   |||||     |         |
       swapper/0-1       [000] ...1.     0.261120: tpm_init <-do_one_initcall
       swapper/0-1       [000] ...1.     0.261376: tpm_dev_common_init <-tpm_init
       swapper/0-1       [000] ...1.     0.405481: fork_usermode_driver <-vtpm_module_init
    kworker/u2:0-34      [000] ...1.     0.406436: tpm_chip_alloc <-vtpm_proxy_create_device.part.0
    kworker/u2:0-34      [000] ...1.     0.406502: tpm2_init_space <-tpm_chip_alloc
    kworker/u2:0-34      [000] ...1.     0.406610: tpm_dev_release <-device_release