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Sun, 8 Mar 2020 03:53:35 +0000 From: Alex Belits To: "frederic@kernel.org" , "rostedt@goodmis.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); 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.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); -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel