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Thu, 12 Nov 2026 08:38:32 -0800 (PST) Received: from linux.fritz.box ([2a00:6d43:105:c401:e307:1a37:2e76:ce91]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-49c5d223a29sm226827f8f.8.2026.11.12.08.38.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Nov 2026 08:38:31 -0800 (PST) From: Marco Crivellari To: linux-kernel@vger.kernel.org Cc: Frederic Weisbecker , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , K Prateek Nayak , "Paul E . McKenney" , Anna-Maria Behnsen , Thomas Gleixner , Jonathan Corbet , Randy Dunlap , Shuah Khan , Marco Crivellari , Michal Hocko , Aaron Tomlin , Marcelo Tosatti Subject: [PATCH v3 5/5] Documentation: no_hz: Add tick stop in polling idle Date: Thu, 12 Nov 2026 17:38:13 +0100 Message-ID: <20261112163813.524336-6-marco.crivellari@suse.com> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261112163813.524336-1-marco.crivellari@suse.com> References: <20261112163813.524336-1-marco.crivellari@suse.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On nohz_full CPUs the scheduling-clock tick is stopped while polling. Update the documentation accordingly. Signed-off-by: Marco Crivellari Reviewed-by: Frederic Weisbecker --- Documentation/timers/no_hz.rst | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/timers/no_hz.rst b/Documentation/timers/no_hz.rst index 4006cab64079..86cea04d2a49 100644 --- a/Documentation/timers/no_hz.rst +++ b/Documentation/timers/no_hz.rst @@ -246,6 +246,8 @@ Known Issues be even worse than that of dyntick-idle. Furthermore, this parameter effectively disables Turbo Mode on Intel CPUs, which can significantly reduce maximum performance. + Note also that on nohz_full CPUs the scheduling-clock tick + is stopped while polling, as in the other idle states. * Adaptive-ticks slows user/kernel transitions slightly. This is not expected to be a problem for computationally intensive -- 2.56.0