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([74.48.213.230]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2c159e25dc7sm2786389eec.27.2026.03.25.02.09.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Mar 2026 02:10:04 -0700 (PDT) From: Qiliang Yuan Date: Wed, 25 Mar 2026 17:09:34 +0800 Subject: [PATCH 03/15] sched/isolation: Separate housekeeping types in enum hk_type 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-v1-3-919cca23cadf@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 Most kernel noise types (TICK, TIMER, RCU, etc.) are currently aliased to a single HK_TYPE_KERNEL_NOISE enum value. This prevents fine-grained runtime isolation control as all masks are forced to be identical. Un-alias service-specific housekeeping types in enum hk_type. This separation provides the necessary granularity for DHEI subsystems to subscribe to and maintain independent affinity masks. Signed-off-by: Qiliang Yuan --- include/linux/sched/isolation.h | 19 ++++++++----------- 1 file changed, 8 insertions(+), 11 deletions(-) diff --git a/include/linux/sched/isolation.h b/include/linux/sched/isolation.h index 9df55237d3901..6ec64eb3f8bcb 100644 --- a/include/linux/sched/isolation.h +++ b/include/linux/sched/isolation.h @@ -10,21 +10,18 @@ enum hk_type { HK_TYPE_DOMAIN, HK_TYPE_MANAGED_IRQ, - HK_TYPE_KERNEL_NOISE, + HK_TYPE_TICK, + HK_TYPE_TIMER, + HK_TYPE_RCU, + HK_TYPE_MISC, + HK_TYPE_WQ, + HK_TYPE_KTHREAD, HK_TYPE_MAX, - /* - * The following housekeeping types are only set by the nohz_full - * boot commandline option. So they can share the same value. - */ - HK_TYPE_TICK = HK_TYPE_KERNEL_NOISE, - HK_TYPE_TIMER = HK_TYPE_KERNEL_NOISE, - HK_TYPE_RCU = HK_TYPE_KERNEL_NOISE, - HK_TYPE_MISC = HK_TYPE_KERNEL_NOISE, - HK_TYPE_WQ = HK_TYPE_KERNEL_NOISE, - HK_TYPE_KTHREAD = HK_TYPE_KERNEL_NOISE }; +#define HK_TYPE_KERNEL_NOISE HK_TYPE_TICK + struct housekeeping_update { enum hk_type type; const struct cpumask *new_mask; -- 2.43.0