From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ross Zwisler <zwisler@chromium.org>
Cc: linux-kernel@vger.kernel.org, Ross Zwisler <zwisler@google.com>,
Peter Zijlstra <peterz@infradead.org>,
Steven Rostedt <rostedt@goodmis.org>,
linux-trace-kernel@vger.kernel.org,
Ingo Molnar <mingo@redhat.com>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
linux-perf-users@vger.kernel.org
Subject: Re: [PATCH 4/9] perf docs: use canonical ftrace path
Date: Wed, 1 Feb 2023 22:24:21 -0300 [thread overview]
Message-ID: <Y9sQxX70vviNj+mn@kernel.org> (raw)
In-Reply-To: <20230130181915.1113313-5-zwisler@google.com>
Em Mon, Jan 30, 2023 at 11:19:10AM -0700, Ross Zwisler escreveu:
> 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.
Thanks, applied.
- Arnaldo
> Signed-off-by: Ross Zwisler <zwisler@google.com>
> ---
> 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
>
--
- Arnaldo
next prev parent reply other threads:[~2023-02-02 1:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-30 18:19 [PATCH 0/9] use canonical ftrace path whenever possible Ross Zwisler
2023-01-30 18:19 ` [PATCH 4/9] perf docs: use canonical ftrace path Ross Zwisler
2023-02-02 1:24 ` Arnaldo Carvalho de Melo [this message]
2023-01-30 19:26 ` [PATCH 0/9] use canonical ftrace path whenever possible Michael S. Tsirkin
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