[PATCH 4/9] perf docs: use canonical ftrace path

From: Ross Zwisler
Date: Mon Jan 30 2023 - 13:20:22 EST


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

A few spots in the perf docs still refer to this older debugfs path, so
let's update them to avoid confusion.

Signed-off-by: Ross Zwisler <zwisler@xxxxxxxxxx>
---
tools/perf/Documentation/perf-list.txt | 2 +-
tools/perf/Documentation/perf-script-perl.txt | 2 +-
tools/perf/Documentation/perf-script-python.txt | 4 ++--
3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt
index 57384a97c04f..6c83459d3192 100644
--- a/tools/perf/Documentation/perf-list.txt
+++ b/tools/perf/Documentation/perf-list.txt
@@ -228,7 +228,7 @@ This can be overridden by setting the kernel.perf_event_paranoid
sysctl to -1, which allows non root to use these events.

For accessing trace point events perf needs to have read access to
-/sys/kernel/debug/tracing, even when perf_event_paranoid is in a relaxed
+/sys/kernel/tracing, even when perf_event_paranoid is in a relaxed
setting.

TRACING
diff --git a/tools/perf/Documentation/perf-script-perl.txt b/tools/perf/Documentation/perf-script-perl.txt
index fa4f39d305a7..5b479f5e62ff 100644
--- a/tools/perf/Documentation/perf-script-perl.txt
+++ b/tools/perf/Documentation/perf-script-perl.txt
@@ -55,7 +55,7 @@ Traces meant to be processed using a script should be recorded with
the above option: -a to enable system-wide collection.

The format file for the sched_wakeup event defines the following fields
-(see /sys/kernel/debug/tracing/events/sched/sched_wakeup/format):
+(see /sys/kernel/tracing/events/sched/sched_wakeup/format):

----
format:
diff --git a/tools/perf/Documentation/perf-script-python.txt b/tools/perf/Documentation/perf-script-python.txt
index cf4b7f4b625a..6a8581012e16 100644
--- a/tools/perf/Documentation/perf-script-python.txt
+++ b/tools/perf/Documentation/perf-script-python.txt
@@ -319,7 +319,7 @@ So those are the essential steps in writing and running a script. The
process can be generalized to any tracepoint or set of tracepoints
you're interested in - basically find the tracepoint(s) you're
interested in by looking at the list of available events shown by
-'perf list' and/or look in /sys/kernel/debug/tracing/events/ for
+'perf list' and/or look in /sys/kernel/tracing/events/ for
detailed event and field info, record the corresponding trace data
using 'perf record', passing it the list of interesting events,
generate a skeleton script using 'perf script -g python' and modify the
@@ -449,7 +449,7 @@ Traces meant to be processed using a script should be recorded with
the above option: -a to enable system-wide collection.

The format file for the sched_wakeup event defines the following fields
-(see /sys/kernel/debug/tracing/events/sched/sched_wakeup/format):
+(see /sys/kernel/tracing/events/sched/sched_wakeup/format):

----
format:
--
2.39.1.456.gfc5497dd1b-goog