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

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Message-ID: <20251229170021.71cc5425@gandalf.local.home>
Date: Mon, 29 Dec 2025 17:00:21 -0500
From: Steven Rostedt <steven@...tedt.org>
To: "Rafael J. Wysocki" <rafael@...nel.org>
Cc: Christian Loehle <christian.loehle@....com>,
 Samuel Wu <wusamuel@...gle.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, 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