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Mon, 25 May 2026 01:53:32 +0000 Message-ID: <9e921b33-4029-4a75-82f2-ad2891e9d3d5@intel.com> Date: Mon, 25 May 2026 09:53:22 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [tip:sched/core] [sched/fair] c9d93a73ce: WARNING:suspicious_RCU_usage To: kernel test robot , Andrea Righi CC: , , , , Peter Zijlstra , K Prateek Nayak , Vincent Guittot , References: <202605232131.cfcd45a2-lkp@intel.com> Content-Language: en-US From: "Chen, Yu C" In-Reply-To: <202605232131.cfcd45a2-lkp@intel.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: KU0P306CA0050.MYSP306.PROD.OUTLOOK.COM (2603:1096:d10:28::7) To DM4PR11MB6020.namprd11.prod.outlook.com (2603:10b6:8:61::19) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM4PR11MB6020:EE_|LV2PR11MB9600:EE_ X-MS-Office365-Filtering-Correlation-Id: 23d0f306-528c-4ac8-4f1a-08deba006c6c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|366016|22082099003|56012099003|18002099003|11063799006; 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- sd = rcu_dereference_all(per_cpu(sd_llc, cpu)); + sd = rcu_dereference_all_check(per_cpu(sd_llc, cpu), + lockdep_is_cpus_held()); /* * sd->nohz_idle only pairs with nr_busy_cpus on sd->shared; if this @@ -12815,7 +12817,8 @@ void nohz_balance_exit_idle(struct rq *rq) static void set_cpu_sd_state_idle(int cpu) { struct sched_domain *sd; - sd = rcu_dereference_all(per_cpu(sd_llc, cpu)); + sd = rcu_dereference_all_check(per_cpu(sd_llc, cpu), + lockdep_is_cpus_held()); /* See set_cpu_sd_state_busy(): nohz_idle is only used with sd->shared. */ if (!sd || !sd->shared || sd->nohz_idle)