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([74.48.213.230]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2c159e25dc7sm2786389eec.27.2026.03.25.02.11.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Mar 2026 02:11:31 -0700 (PDT) From: Qiliang Yuan Date: Wed, 25 Mar 2026 17:09:45 +0800 Subject: [PATCH 14/15] Documentation: isolation: Document DHEI sysfs interfaces Precedence: bulk X-Mailing-List: rcu@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260325-dhei-v12-final-v1-14-919cca23cadf@gmail.com> References: <20260325-dhei-v12-final-v1-0-919cca23cadf@gmail.com> In-Reply-To: <20260325-dhei-v12-final-v1-0-919cca23cadf@gmail.com> To: Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Thomas Gleixner , "Paul E. McKenney" , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Uladzislau Rezki , Mathieu Desnoyers , Lai Jiangshan , Zqiang , Tejun Heo , Andrew Morton , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Johannes Weiner , Zi Yan , Anna-Maria Behnsen , Ingo Molnar , Shuah Khan Cc: linux-kernel@vger.kernel.org, rcu@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, Qiliang Yuan X-Mailer: b4 0.13.0 --- .../ABI/testing/sysfs-kernel-housekeeping | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-kernel-housekeeping b/Documentation/ABI/testing/sysfs-kernel-housekeeping new file mode 100644 index 0000000000000..3648578200111 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-kernel-housekeeping @@ -0,0 +1,22 @@ +What: /sys/kernel/housekeeping/ +Date: March 2026 +Contact: Qiliang Yuan +Description: + Directory containing the dynamic housekeeping configuration + for various kernel subsystems. + + Each file represents a specific housekeeping type: + - timer: Timer and hrtimer interrupts. + - rcu: RCU callback offloading and GP kthreads. + - misc: Miscellaneous kernel services (e.g. kcompactd). + - tick: Dynamic full dynticks (NOHZ_FULL) state. + - domain: Scheduler domain isolation. + - workqueue: Workqueue affinity. + - managed_irq: Managed interrupts migration. + - kthread: General kernel thread affinity. + - smt_aware_mode: SMT-aware isolation toggle (0/1). + When enabled, writing a mask that does not include all + sibling threads of a core will be rejected with -EINVAL. + + Writing a CPULIST to the type files dynamically updates the + housekeeping mask for the corresponding type. -- 2.43.0