On Sun, 24 Nov 2019 16:35:29 -0500 Steven Rostedt rostedt@goodmis.org wrote:
On Sun, 24 Nov 2019 13:55:39 +0900 Masami Hiramatsu mhiramat@kernel.org wrote:
If we run ftracetest on the kernel with CONFIG_FUNCTION_TRACER=n, there is no set_ftrace_filter and all test cases are failed,
Note, that we can have CONFIG_FUNCTION_TRACER=y and there be no set_ftrace_filter. That is determined by CONFIG_DYNAMIC_FTRACE. I guess we should probably still check for that for this test, but I just wanted to state that set_ftrace_filter is not dependent on FUNCTION_TRACER but instead DYNAMIC_FTRACE.
Ah, good catch! I always set DYNAMIC_FTRACE=y if FUNCTION_TRACER=y. OK, I'll update the description.
Thank you,
because reset_ftrace_filter returns an error. Let's check whether set_ftrace_filter exists and remove redundant set_ftrace_filter from initialize_ftrace().
Signed-off-by: Masami Hiramatsu mhiramat@kernel.org
tools/testing/selftests/ftrace/test.d/functions | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/ftrace/test.d/functions b/tools/testing/selftests/ftrace/test.d/functions index 86986c4bba54..19d288cdf336 100644 --- a/tools/testing/selftests/ftrace/test.d/functions +++ b/tools/testing/selftests/ftrace/test.d/functions @@ -46,6 +46,9 @@ reset_events_filter() { # reset all current setting filters } reset_ftrace_filter() { # reset all triggers in set_ftrace_filter
- if [ ! -f set_ftrace_filter ]; then
return 0- fi echo > set_ftrace_filter grep -v '^#' set_ftrace_filter | while read t; do tr=`echo $t | cut -d: -f2`
@@ -93,7 +96,6 @@ initialize_ftrace() { # Reset ftrace to initial-state disable_events [ -f set_event_pid ] && echo > set_event_pid [ -f set_ftrace_pid ] && echo > set_ftrace_pid
- [ -f set_ftrace_filter ] && echo | tee set_ftrace_*
This also resets set_ftrace_notrace, which reset_ftrace_filter does not.
-- Steve
[ -f set_graph_function ] && echo | tee set_graph_* [ -f stack_trace_filter ] && echo > stack_trace_filter [ -f kprobe_events ] && echo > kprobe_events