linux-kernel - Re: [PATCH v3 1/2] cpufreq: Replace trace_cpu_frequency with trace_policy

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Message-ID: <CAG2KctqvAKUYwWex=8vDeMvAaDEUJ0D4gEoAZczapnpeM5p-SQ@mail.gmail.com>
Date: Thu, 15 Jan 2026 15:35:22 -0800
From: Samuel Wu <wusamuel@...gle.com>
To: Steven Rostedt <steven@...tedt.org>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>, Christian Loehle <christian.loehle@....com>, 
	Huang Rui <ray.huang@....com>, "Gautham R. Shenoy" <gautham.shenoy@....com>, 
	Mario Limonciello <mario.limonciello@....com>, Perry Yuan <perry.yuan@....com>, 
	Jonathan Corbet <corbet@....net>, Viresh Kumar <viresh.kumar@...aro.org>, 
	Masami Hiramatsu <mhiramat@...nel.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, 
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>, Len Brown <lenb@...nel.org>, 
	Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, 
	Andrii Nakryiko <andrii@...nel.org>, Martin KaFai Lau <martin.lau@...ux.dev>, 
	Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>, 
	Yonghong Song <yonghong.song@...ux.dev>, John Fastabend <john.fastabend@...il.com>, 
	KP Singh <kpsingh@...nel.org>, Stanislav Fomichev <sdf@...ichev.me>, Hao Luo <haoluo@...gle.com>, 
	Jiri Olsa <jolsa@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Ian Rogers <irogers@...gle.com>, 
	Adrian Hunter <adrian.hunter@...el.com>, James Clark <james.clark@...aro.org>, 
	kernel-team@...roid.com, linux-pm@...r.kernel.org, linux-doc@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org, 
	bpf@...r.kernel.org, linux-perf-users@...r.kernel.org
Subject: Re: [PATCH v3 1/2] cpufreq: Replace trace_cpu_frequency with trace_policy_frequency

On Mon, Dec 29, 2025 at 2:00 PM Steven Rostedt <steven@...tedt.org> wrote:
>
> On Mon, 29 Dec 2025 16:52:12 -0500
> Steven Rostedt <rostedt@...dmis.org> wrote:
>
> > On Thu, 4 Dec 2025 18:24:57 +0100
> > "Rafael J. Wysocki" <rafael@...nel.org> wrote:
> >
> > > My concern is that the patch effectively removes one trace point
> > > (cpu_frequency) and adds another one with a different format
> > > (policy_frequency), updates one utility in the kernel tree and expects
> > > everyone else to somehow know that they should switch over.
> > >
> > > I know about at least several people who have their own scripts using
> > > this tracepoint though.
> >
> > Hi Rafael,
> >
> > Can you reach out to those that have scripts that use this trace event to
> > see if it can be changed?
> >
> > Thanks,
>
> I got a bunch of "Undelivered Mail Returned to Sender". It seems that gmail
> thinks my goodmis.org account is now spam :-p
>
> -- Steve
>
Hi Rafael,

Bumping thread since it's unclear if Steven's email has gone through.

Are you able to reach out to those with the scripts using this
tracepoint to see if they can be changed? Hopefully this update can be
proactive, but I'm optimistic even a reactive update would be
straightforward.

-- Sam