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Thu, 25 Feb 2021 11:18:23 +0000 From: Mikael Beckius To: anna-maria@linutronix.de Cc: linux-kernel@vger.kernel.org, mikael.beckius@windriver.com, tglx@linutronix.de Subject: Sv: Sv: [PATCH] hrtimer: Interrupt storm on clock_settime Date: Thu, 25 Feb 2021 12:18:14 +0100 Message-Id: <20210225111814.8383-1-mikael.beckius@windriver.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [94.254.65.183] X-ClientProxiedBy: SJ0PR05CA0146.namprd05.prod.outlook.com (2603:10b6:a03:33d::31) To PH0PR11MB4904.namprd11.prod.outlook.com (2603:10b6:510:40::10) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from windriver.com (94.254.65.183) by SJ0PR05CA0146.namprd05.prod.outlook.com (2603:10b6:a03:33d::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3912.9 via Frontend Transport; Thu, 25 Feb 2021 11:18:22 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 092949b0-f11d-4c76-4867-08d8d97f1076 X-MS-TrafficTypeDiagnostic: PH0PR11MB4984: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8273; 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To keep it working > cpu_base::*expires_next is only updated by hrtimer_reprogram() and > hrtimer_interrupt(). I will send you a patch for testing in reply to this > thread. The patch is compile tested only. > Ok. I kind of guessed that would be the response as I noticed a similar comment during the review of the original patch which introduced the softirq_expires_next logic. Anyway it seemed logical to update softirq_expires_next when updating softirq_next_timer. Micke