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To: Thomas Gleixner , LKML References: <87wnzvp75p.fsf@nanos.tec.linutronix.de> From: Chris Friesen Message-ID: <0d3cff4f-619f-3479-2195-e07451636249@windriver.com> Date: Tue, 13 Oct 2020 00:21:02 -0600 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.12.1 In-Reply-To: <87wnzvp75p.fsf@nanos.tec.linutronix.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [70.64.84.123] X-ClientProxiedBy: BYAPR05CA0041.namprd05.prod.outlook.com (2603:10b6:a03:74::18) To SJ0PR11MB5120.namprd11.prod.outlook.com (2603:10b6:a03:2d1::13) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [172.25.39.5] (70.64.84.123) by BYAPR05CA0041.namprd05.prod.outlook.com (2603:10b6:a03:74::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3477.11 via Frontend Transport; Tue, 13 Oct 2020 06:21:03 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: eecd791b-05c7-474f-8288-08d86f4029c5 X-MS-TrafficTypeDiagnostic: BYAPR11MB2613: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:9508; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: MXlmfgM4qHTpAnCbCwnfUXmYA1sWVhB/LVUSXxD5zdW1iJs6/Qcw7J8KSMvuHu0vGID/GSa3bj9YwV+lrXDWTsQQWKLSIORjEvB/2Iva3EnTueGYUSIgr1o2hLzrGQtb4FMV/PILdI7mp8UKSzfJGWrBKgWHD88toe2m3lKwYg6RMMz7xrgj7K+DZBgdOMK7QpknL5YUMAf9XdAfBAjU9QoMxM1HARuZbcI4ItBfFqX6khMveM2RxKanh7VjA5FrHqWh1Do3xEF93klKtTROOFqgBo7li6BlXlHzX2j/VAtExBU9yv+FhqOkOM2H50nu06g6VJaMhWQ4C4gQ0dr1vRqTs7PbfXybssGsoz6NnvoCoYdE6Y1JYuFb0J/DIsBD X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SJ0PR11MB5120.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(4636009)(136003)(366004)(346002)(39850400004)(376002)(396003)(31696002)(53546011)(5660300002)(4744005)(52116002)(478600001)(66946007)(2616005)(36756003)(956004)(2906002)(86362001)(316002)(16526019)(66476007)(26005)(31686004)(110136005)(66556008)(186003)(16576012)(8936002)(6486002)(44832011)(8676002)(43740500002);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: windriver.com X-MS-Exchange-CrossTenant-Network-Message-Id: eecd791b-05c7-474f-8288-08d86f4029c5 X-MS-Exchange-CrossTenant-AuthSource: SJ0PR11MB5120.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Oct 2020 06:21:04.4714 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 8ddb2873-a1ad-4a18-ae4e-4644631433be X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: i0dXfFVSnru4UudnFeLeSo6jJP/T/AsP4WTfUJ+oQPQegHJSfJfbkHgBcY+jHPoO0+7iMQFLEJffrBuV1KSEzv6jZj1ePoVz6B7lYFUfMQg= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR11MB2613 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/12/2020 1:37 PM, Thomas Gleixner wrote: > On Mon, Oct 12 2020 at 12:40, Chris Friesen wrote: >> On one of my X86-64 systems /proc/interrupts starts with the following >> interrupts (per-cpu info snipped): >> >> 0: IR-IO-APIC-edge timer >> 4: IR-IO-APIC-edge serial >> 8: IR-IO-APIC-edge rtc0 >> 9: IR-IO-APIC-fasteoi acpi >> 17: IR-IO-APIC-fasteoi ehci_hcd:usb1, hpilo >> >> >> On this same system /proc/irq shows these interrupts: >> >> 0-15, 17 >> >> Is there any way to determine what the interrupts are that aren't listed >> in /proc/interrupts? > > They are simply unused I wonder if it might be clearer to just not report them at all if they're not used? Anyways, thanks for the explanation. Chris