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| author | Ross Zwisler <zwisler@chromium.org> | 2023-02-15 23:33:45 +0100 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-02-18 20:34:09 +0100 |
| commit | 2455f0e124d317dd08d337a7550a78a224d4ba41 (patch) | |
| tree | a26318d9852d06d95c8f68740fe5e3e7de3a4c1d /scripts/tracing/draw_functrace.py | |
| parent | tracing/histogram: Fix stacktrace histogram Documententation (diff) | |
| download | linux-2455f0e124d317dd08d337a7550a78a224d4ba41.tar.xz linux-2455f0e124d317dd08d337a7550a78a224d4ba41.zip | |
tracing: Always use canonical ftrace path
The canonical location for the tracefs filesystem is at /sys/kernel/tracing.
But, from Documentation/trace/ftrace.rst:
Before 4.1, all ftrace tracing control files were within the debugfs
file system, which is typically located at /sys/kernel/debug/tracing.
For backward compatibility, when mounting the debugfs file system,
the tracefs file system will be automatically mounted at:
/sys/kernel/debug/tracing
Many comments and Kconfig help messages in the tracing code still refer
to this older debugfs path, so let's update them to avoid confusion.
Link: https://lore.kernel.org/linux-trace-kernel/20230215223350.2658616-2-zwisler@google.com
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Mukesh Ojha <quic_mojha@quicinc.com>
Signed-off-by: Ross Zwisler <zwisler@google.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'scripts/tracing/draw_functrace.py')
| -rwxr-xr-x | scripts/tracing/draw_functrace.py | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/scripts/tracing/draw_functrace.py b/scripts/tracing/draw_functrace.py index 438516bdfb3c..42fa87300941 100755 --- a/scripts/tracing/draw_functrace.py +++ b/scripts/tracing/draw_functrace.py @@ -12,9 +12,9 @@ calls. Only the functions's names and the call time are provided. Usage: Be sure that you have CONFIG_FUNCTION_TRACER - # mount -t debugfs nodev /sys/kernel/debug - # echo function > /sys/kernel/debug/tracing/current_tracer - $ cat /sys/kernel/debug/tracing/trace_pipe > ~/raw_trace_func + # mount -t tracefs nodev /sys/kernel/tracing + # echo function > /sys/kernel/tracing/current_tracer + $ cat /sys/kernel/tracing/trace_pipe > ~/raw_trace_func Wait some times but not too much, the script is a bit slow. Break the pipe (Ctrl + Z) $ scripts/tracing/draw_functrace.py < ~/raw_trace_func > draw_functrace |