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Sun, 8 Mar 2020 03:53:35 +0000 Received: from BYAPR18MB2535.namprd18.prod.outlook.com ([fe80::8cd1:1741:8d2d:1c23]) by BYAPR18MB2535.namprd18.prod.outlook.com ([fe80::8cd1:1741:8d2d:1c23%7]) with mapi id 15.20.2793.013; Sun, 8 Mar 2020 03:53:35 +0000 From: Alex Belits To: "frederic@kernel.org" , "rostedt@goodmis.org" CC: "mingo@kernel.org" , "peterz@infradead.org" , "linux-kernel@vger.kernel.org" , Prasun Kapoor , "tglx@linutronix.de" , "linux-api@vger.kernel.org" , "catalin.marinas@arm.com" , "linux-arm-kernel@lists.infradead.org" , "netdev@vger.kernel.org" , "davem@davemloft.net" , "linux-arch@vger.kernel.org" , "will@kernel.org" Subject: [PATCH v2 08/12] task_isolation: don't interrupt CPUs with tick_nohz_full_kick_cpu() Thread-Topic: [PATCH v2 08/12] task_isolation: don't interrupt CPUs with tick_nohz_full_kick_cpu() Thread-Index: AQHV9P0k4GMnIbRPmkShfBNP7hpH9A== Date: Sun, 8 Mar 2020 03:53:35 +0000 Message-ID: <0b4615be96008d1031efd3ed309437c05d564019.camel@marvell.com> References: <4473787e1b6bc3cc226067e8d122092a678b63de.camel@marvell.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [199.233.58.128] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 0e45a13b-7eaa-444d-32e0-08d7c3144730 x-ms-traffictypediagnostic: BYAPR18MB2661: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:4502; x-forefront-prvs: 03361FCC43 x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(4636009)(376002)(346002)(39850400004)(136003)(366004)(396003)(189003)(199004)(5660300002)(186003)(26005)(66946007)(66446008)(66476007)(64756008)(66556008)(6486002)(6506007)(6512007)(91956017)(478600001)(76116006)(7416002)(4326008)(2906002)(86362001)(36756003)(4744005)(71200400001)(2616005)(8936002)(81156014)(8676002)(81166006)(54906003)(110136005)(316002); DIR:OUT; SFP:1101; SCL:1; SRVR:BYAPR18MB2661; H:BYAPR18MB2535.namprd18.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: marvell.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: w9bPIUUzRiYavzQsGz27feKKQf8amrol5kYqO7iXcCaEp8nzSy1wJS3UM6lmsNKetDMCHDMxfksjTTHV+JqDDeeVF9iyV20xul+ZVXK6WXkamgAlQ0+cWFqIxoDZEhmHXWBfBkBtiCC1XtXsn0rZGcmG8W9+XthgjRby9V0kDV1BrCwjfBZI9aMLTsDUWwCDWqWSJNO7xEHN3cI9GdardtUE/2nIBkiDStouejbC6aIGa+8fgQISTS4Nycq1FtiXQeGw6zMCPpRnUZwwmpMG8dZPM9hh1KYvH4Ni/2rlPVqHK7paDSHn3M3hMKcf3tkFSNiX3PCsWFx0AjeKlopfzA1FJbdFcxN9RccNRn7pYQVxFaMrQK9QRnEmu6d9VAHNfcJ/Lso7q1flujlkcbqWoGCfb28l1Wk6jQONikJtedVMVGx5icynODpZWFm6bI0b x-ms-exchange-antispam-messagedata: wyFtbJwbo6uu250MoBQgzm7ZNyMUyGQO2/miTojm5/qyvw0WKKMRBHvmyOacwPPdqHRInbiCNY4K8slZeUaN1624bOfG6jpax/sC/Y1XGp319fM8pDRyNspFPiMfq82wcrsWLWiwTuhsIHWvfwwJvg== Content-ID: <12BFA578C199064E880E6064C4B51C83@namprd18.prod.outlook.com> MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 0e45a13b-7eaa-444d-32e0-08d7c3144730 X-MS-Exchange-CrossTenant-originalarrivaltime: 08 Mar 2020 03:53:35.5828 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 70e1fb47-1155-421d-87fc-2e58f638b6e0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: niHMUmcgY/fF4N9xHpXroHTwFYtzu4p3oiRGrstz1DZ7DXcdet+XUAxR0dX5qMW6MyQERa6y8/fum4Mdq6j+ig== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR18MB2661 X-OriginatorOrg: marvell.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.572 definitions=2020-03-07_09:2020-03-06,2020-03-07 signatures=0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Yuri Norov For nohz_full CPUs the desirable behavior is to receive interrupts generated by tick_nohz_full_kick_cpu(). But for hard isolation it's obviously not desirable because it breaks isolation. This patch adds check for it. Signed-off-by: Yuri Norov [abelits@marvell.com: updated, only exclude CPUs running isolated tasks] Signed-off-by: Alex Belits --- kernel/time/tick-sched.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 1d4dec9d3ee7..fe4503ba1316 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -262,7 +263,7 @@ static void tick_nohz_full_kick(void) */ void tick_nohz_full_kick_cpu(int cpu) { - if (!tick_nohz_full_cpu(cpu)) + if (!tick_nohz_full_cpu(cpu) || task_isolation_on_cpu(cpu)) return; irq_work_queue_on(&per_cpu(nohz_full_kick_work, cpu), cpu);