On 10/02/2022 14:47, Sebastian Andrzej Siewior wrote:
On 2022-02-10 09:33:56 [+0100], Krzysztof Kozlowski wrote:
The PREEMPT_RT patchset does not use soft IRQs thus trying to filter for do_softirq fails for such kernel:
PREEMPT_RT does use soft IRQs.
Correct. It does not use do_softirq() code, but follows different path with ksoftirqd. Shall I rephrase it towards something like this? Or maybe you have some more accurate description?
The implementation detail is that do_softirq() is in ifndef.
echo do_softirq ftracetest: 81: echo: echo: I/O error
Choose some other visible function for the test.
…
--- a/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc +++ b/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc @@ -19,7 +19,7 @@ fail() { # mesg FILTER=set_ftrace_filter FUNC1="schedule" -FUNC2="do_softirq" +FUNC2="scheduler_tick"
What is the purpose of this?
ALL_FUNCS="#### all functions enabled ####"
Sebastian
Best regards, Krzysztof