Created attachment 845262 [details]
"acpi_cpufreq.dyndbg= file drivers/cpufreq/acpi-cpufreq.c +mpf" (dmesg | grep
dyndbg)

The following dyndbg query, added to the kernel command line (kernel version
v5.11-rc3) doesn't produce the expected debugging logs:

    "acpi_cpufreq.dyndbg= file drivers/cpufreq/acpi-cpufreq.c +mpf"

The following output shows that the query is partially understood, but it's
been noted that it should not say "acpi_cpufreq_exit =_", but rather 
"acpi_cpufreq_exit =mpf"

    # cat /sys/kernel/debug/dynamic_debug/control | grep acpi-cpufreq

    drivers/cpufreq/acpi-cpufreq.c:980 [acpi_cpufreq]acpi_cpufreq_exit =_
"%s\012"
    drivers/cpufreq/acpi-cpufreq.c:959 [acpi_cpufreq]acpi_cpufreq_init =_ "CPB
unsupported, do not expose it\012"
    drivers/cpufreq/acpi-cpufreq.c:943 [acpi_cpufreq]acpi_cpufreq_init =_
"%s\012"
    drivers/cpufreq/acpi-cpufreq.c:906 [acpi_cpufreq]acpi_cpufreq_boost_init =_
"Boost capabilities not present in the processor\012"
    drivers/cpufreq/acpi-cpufreq.c:870 [acpi_cpufreq]acpi_cpufreq_resume =_
"%s\012"
    drivers/cpufreq/acpi-cpufreq.c:845 [acpi_cpufreq]acpi_cpufreq_cpu_exit =_
"%s\012"
    drivers/cpufreq/acpi-cpufreq.c:817 [acpi_cpufreq]acpi_cpufreq_cpu_init =_ "
    %cP%d: %d MHz, %d mW, %d uS\012"
    drivers/cpufreq/acpi-cpufreq.c:811 [acpi_cpufreq]acpi_cpufreq_cpu_init =_
"CPU%u - ACPI performance management activated.\012"
    drivers/cpufreq/acpi-cpufreq.c:748 [acpi_cpufreq]acpi_cpufreq_cpu_init =_
"Unknown addr space %d\012"
    drivers/cpufreq/acpi-cpufreq.c:731 [acpi_cpufreq]acpi_cpufreq_cpu_init =_
"HARDWARE addr space\012"
    drivers/cpufreq/acpi-cpufreq.c:725 [acpi_cpufreq]acpi_cpufreq_cpu_init =_
"SYSTEM IO addr space\012"
    drivers/cpufreq/acpi-cpufreq.c:721 [acpi_cpufreq]acpi_cpufreq_cpu_init =_
"AMD K8 systems must use native drivers.\012"
    drivers/cpufreq/acpi-cpufreq.c:707 [acpi_cpufreq]acpi_cpufreq_cpu_init =_
"No P-States\012"
    drivers/cpufreq/acpi-cpufreq.c:645 [acpi_cpufreq]acpi_cpufreq_cpu_init =_
"%s\012"
    drivers/cpufreq/acpi-cpufreq.c:565 [acpi_cpufreq]acpi_cpufreq_early_init =_
"Memory allocation error for acpi_perf_data.\012"
    drivers/cpufreq/acpi-cpufreq.c:561 [acpi_cpufreq]acpi_cpufreq_early_init =_
"%s\012"
    drivers/cpufreq/acpi-cpufreq.c:447 [acpi_cpufreq]acpi_cpufreq_target =_ "%s
(%d)\012"
    drivers/cpufreq/acpi-cpufreq.c:430 [acpi_cpufreq]acpi_cpufreq_target =_
"Already at target state (P%d)\012"
    drivers/cpufreq/acpi-cpufreq.c:426 [acpi_cpufreq]acpi_cpufreq_target =_
"Called after resume, resetting to P%d\012"
    drivers/cpufreq/acpi-cpufreq.c:387 [acpi_cpufreq]get_cur_freq_on_cpu =_
"cur freq = %u\012"
    drivers/cpufreq/acpi-cpufreq.c:367 [acpi_cpufreq]get_cur_freq_on_cpu =_ "%s
(%d)\012"
    drivers/cpufreq/acpi-cpufreq.c:355 [acpi_cpufreq]get_cur_val =_ "%s =
%u\012"
    drivers/cpufreq/acpi-cpufreq.c:134 [acpi_cpufreq]set_boost =_ "CPU %*pbl:
Core Boosting %sabled.\012"

A snippet of the boot log using dynamic_debug.verbose=2 is attached.