Currently, tracing_thresh works only if we specify it before selecting
function_graph tracer. If we do the opposite, tracing_thresh will change
it's value, but it will not be applied.
To fix it, we need to always register handlers which take tracing_thresh into
account.
Signed-off-by: Stanislav Fomichev <stfomic...@yandex-team.ru>
---
kernel/trace/trace_functions_graph.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/kernel/trace/trace_functions_graph.c
b/kernel/trace/trace_functions_graph.c
index deff11200261..a894031986a3 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -433,12 +433,8 @@ static int graph_trace_init(struct trace_array *tr)
int ret;
set_graph_array(tr);
- if (tracing_thresh)
- ret = register_ftrace_graph(&trace_graph_thresh_return,
- &trace_graph_thresh_entry);
- else
- ret = register_ftrace_graph(&trace_graph_return,
- &trace_graph_entry);
+ ret = register_ftrace_graph(&trace_graph_thresh_return,
+ &trace_graph_thresh_entry);
if (ret)
return ret;
tracing_start_cmdline_record();
--
1.8.3.2
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