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Hermes SMTP Server) with ESMTPA ID ce718115184f3a1163bd756cced3f7a1; Sun, 10 May 2026 14:33:20 +0000 (UTC) From: NicoErdmann To: linux-pm@vger.kernel.org Cc: linux-doc@vger.kernel.org, rafael@kernel.org, viresh.kumar@linaro.org, corbet@lwn.net, skhan@linuxfoundation.org, NicoErdmann Subject: [PATCH] cpufreq-stats: document limitations on modern cpufreq drivers Date: Sun, 10 May 2026 16:33:03 +0200 Message-ID: <20260510143303.120863-1-nicobsc4@yahoo.com> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit References: <20260510143303.120863-1-nicobsc4.ref@yahoo.com> Signed-off-by: NicoErdmann --- Documentation/cpu-freq/cpufreq-stats.rst | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/cpu-freq/cpufreq-stats.rst b/Documentation/cpu-freq/cpufreq-stats.rst index 9ad695b1c7db..e8a8b3a85ad8 100644 --- a/Documentation/cpu-freq/cpufreq-stats.rst +++ b/Documentation/cpu-freq/cpufreq-stats.rst @@ -28,6 +28,13 @@ Various statistics will form read_only files under this directory. This driver is designed to be independent of any particular cpufreq_driver that may be running on your CPU. So, it will work with any cpufreq_driver. +.. note:: + + On some modern systems, this interface may not be available or may not + expose meaningful statistics depending on the active CPU frequency scaling driver. + + In particular, drivers such as intel_pstate or amd_pstate may use alternative + mechanisms for frequency scaling and accounting 2. Statistics Provided (with example) ===================================== -- 2.54.0