[RFC PATCH 3/4] trace: Duplicate the output of the function trace logs to STM
From: Chunyan Zhang <hidden>
Date: 2016-06-01 11:19:39
Also in:
lkml
Subsystem:
the rest, tracing · Maintainers:
Linus Torvalds, Steven Rostedt, Masami Hiramatsu
This patch adds an output from Ftrace to STM. That being said, Function trace messages would also be duplicated to STM buffer when being stored into ring buffer. Signed-off-by: Chunyan Zhang <redacted> --- kernel/trace/trace.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 8a4bd6b..d613053 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c@@ -44,6 +44,7 @@ #include "trace.h" #include "trace_output.h" +#include "trace_output_stm.h" /* * On boot up, the ring buffer is set to the minimum size, so that
@@ -1884,8 +1885,10 @@ trace_function(struct trace_array *tr, entry->ip = ip; entry->parent_ip = parent_ip; - if (!call_filter_check_discard(call, entry, buffer, event)) + if (!call_filter_check_discard(call, entry, buffer, event)) { __buffer_unlock_commit(buffer, event); + ftrace_stm_func(ip, parent_ip); + } } #ifdef CONFIG_STACKTRACE
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1.9.1