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Mon, 8 Jun 2026 11:26:40 +0000 Message-ID: Date: Mon, 8 Jun 2026 19:26:30 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 5/6] fs/resctrl: Do not invoke smp_processor_id() in preemptible context To: Thomas Gleixner CC: , , , , , , , , , , , , References: <87v7bt4ee7.ffs@fw13> Content-Language: en-US From: "Chen, Yu C" In-Reply-To: <87v7bt4ee7.ffs@fw13> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SGAP274CA0019.SGPP274.PROD.OUTLOOK.COM (2603:1096:4:b6::31) To PH7PR11MB6005.namprd11.prod.outlook.com (2603:10b6:510:1e0::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: PH7PR11MB6005:EE_|BY1PR11MB8077:EE_ X-MS-Office365-Filtering-Correlation-Id: 098fbf22-aed3-4008-e34f-08dec550cf67 X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|7416014|376014|22082099003|18002099003|6133799003|4143699003|11063799006|56012099006; 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However, some >> monitor events can be read from any CPU in task context via >> mon_event_count(); in that case the calling context is >> preemptible and smp_processor_id() triggers a debug warning. > > Is this new with this MMIO stuff or is this an existing issue? If the > latter then this patch should be in front of the series and get a fixes > tag. If not the change log should explain it. > It is an existing issue. I'll adjust the sequence and provide a fixes tag. Thanks! thanks, Chenyu