From patchwork Wed Jul 22 14:57:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Belits X-Patchwork-Id: 1333930 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=marvell.com Authentication-Results: ozlabs.org; dkim=fail reason="key not found in DNS" header.d=marvell.com header.i=@marvell.com header.a=rsa-sha256 header.s=pfpt0818 header.b=EVJa0A16; dkim=pass (1024-bit key; unprotected) header.d=marvell.onmicrosoft.com header.i=@marvell.onmicrosoft.com header.a=rsa-sha256 header.s=selector1-marvell-onmicrosoft-com header.b=hk9Mbd9c; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4BBdqx442tz9sSy for ; Thu, 23 Jul 2020 00:58:05 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732799AbgGVO6D (ORCPT ); Wed, 22 Jul 2020 10:58:03 -0400 Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]:31122 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730382AbgGVO6C (ORCPT ); Wed, 22 Jul 2020 10:58:02 -0400 Received: from pps.filterd (m0045851.ppops.net [127.0.0.1]) by mx0b-0016f401.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 06MEml23012168; Wed, 22 Jul 2020 07:57:36 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.com; h=from : to : cc : subject : date : message-id : references : in-reply-to : content-type : content-id : content-transfer-encoding : mime-version; s=pfpt0818; bh=39S4vVNIusSsi2LuvNZmhBBhMhNTv0T4UrDYfmP6564=; b=EVJa0A16lfuFUlWKLZwXw+n8R881k/ZS22EehTrvAnPM66x6SDId+O0ZbNDXSmi0+T/0 B757ZJwzBlKBCttui7WlyVvARBC7lrNUCEbfRcDKrXist3L4yVRGDhUz2q7XpDdZTbUi LH1FkhAETb7mfolgyHqVT5LNvd5hQZLuHe7l1jSGbd2q70wfiZEa/myKJJg10qCTVZQN R3Z2JyKusEtFW2a4DmD/ai7dXbzGnY5Z6eNeYvqm2BptvjP0nYM8PObbV9CglArzVxu/ n4M0gyQCBnsoRDSQWlbTcNl/4X8dDFwlZSfA70nrjXSoKvDQK5T8qk5cKPxxB+wFkjBj pw== Received: from sc-exch01.marvell.com ([199.233.58.181]) by mx0b-0016f401.pphosted.com with ESMTP id 32c0kkrbpe-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Wed, 22 Jul 2020 07:57:36 -0700 Received: from SC-EXCH04.marvell.com (10.93.176.84) by SC-EXCH01.marvell.com (10.93.176.81) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 22 Jul 2020 07:57:34 -0700 Received: from NAM12-DM6-obe.outbound.protection.outlook.com (104.47.59.177) by SC-EXCH04.marvell.com (10.93.176.84) with Microsoft SMTP Server (TLS) id 15.0.1497.2 via Frontend Transport; Wed, 22 Jul 2020 07:57:35 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Tu4VdwZldBfUismKGfeOqVVBE1uc0BQl4NeXvxy/Aa8/eHi5efGhG7zKLvmEbOrFtTcKR4zT97RBX5jmV7UgRsVUz6U8hN+fnJUW1YN6Lkicuv0+K05S5qTLvfB1WtTIJmYkBF7SVYwaoKHVDevmiKWDa5kCLzNN8qeZ0KkyPf9uPX0GOxCYdFZ0rL6YR88go3H8SRkvpJ0DIwIKJgQumDo+OOeRTN6ih6kDQLQltdlj22i5KKh7/pzBQuP90Vj0yWLAnjKvwzEmAJZga42BqoanQM2Ie8lJ74sMFv0tT08zzjTMXKdqd3GVTiD6W70T272U8u6D67tNaXll0BDwww== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=39S4vVNIusSsi2LuvNZmhBBhMhNTv0T4UrDYfmP6564=; b=BDCt/f2IbSIw4jmK1W6+I8fadY3RDlv9TYDWAIRJ7MKjRB+yDmQ6vPnuLItVvQN51GTqat8DwBS6V0ZNIX6TXUNj8yvW/oWoanfmwvNknE0ugHHUauT3iCiL0ZaGz6FEtk9fTEm72C8EFwvddJuRii9gLlAUkkBnna0OHYqo/hRFXjo2IucoEqBMM5j2yYDCBxPIDVcrR3TUUcthZgAiS8ujrUheuiCKhdPwQ098ZlQc0+vUhmiyCnOSlPtviNcPvJc9zcM0aAH2NlIKiFIlQc277pw3e5kw1AFwWXzgWM3se35ql3a3NfhIiOzj/jZtxDli8kZ2XQUCmeQJnuSJug== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=marvell.com; dmarc=pass action=none header.from=marvell.com; dkim=pass header.d=marvell.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.onmicrosoft.com; s=selector1-marvell-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=39S4vVNIusSsi2LuvNZmhBBhMhNTv0T4UrDYfmP6564=; b=hk9Mbd9ca2K2qL1TZ55BgoIt9eD590LWokURNZkJ27imn4sFtN8H6utPmotL8ape1eojbbKqhpkiH97mbgRhqGgosYrv89KkJ/aICop50lttnoMeIRxO6RRpyFVahb6hofN3IBUTbkSLcyVcuQm85GPFDHh080IoJzZkJMNl87I= Received: from MW2PR18MB2267.namprd18.prod.outlook.com (2603:10b6:907:3::11) by MW2PR18MB2156.namprd18.prod.outlook.com (2603:10b6:907:a::25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3195.24; Wed, 22 Jul 2020 14:57:33 +0000 Received: from MW2PR18MB2267.namprd18.prod.outlook.com ([fe80::b9a6:a3f2:2263:dc32]) by MW2PR18MB2267.namprd18.prod.outlook.com ([fe80::b9a6:a3f2:2263:dc32%4]) with mapi id 15.20.3195.026; Wed, 22 Jul 2020 14:57:33 +0000 From: Alex Belits To: "frederic@kernel.org" , "rostedt@goodmis.org" CC: Prasun Kapoor , "mingo@kernel.org" , "davem@davemloft.net" , "linux-api@vger.kernel.org" , "peterz@infradead.org" , "linux-arch@vger.kernel.org" , "catalin.marinas@arm.com" , "tglx@linutronix.de" , "will@kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "netdev@vger.kernel.org" Subject: [PATCH v4 10/13] task_isolation: don't interrupt CPUs with tick_nohz_full_kick_cpu() Thread-Topic: [PATCH v4 10/13] task_isolation: don't interrupt CPUs with tick_nohz_full_kick_cpu() Thread-Index: AQHWYDhuh3VfINlM20KwSBz5WuaF0Q== Date: Wed, 22 Jul 2020 14:57:33 +0000 Message-ID: <5acf7502c071c0d1365ba5e5940e003a7da6521f.camel@marvell.com> References: <04be044c1bcd76b7438b7563edc35383417f12c8.camel@marvell.com> In-Reply-To: <04be044c1bcd76b7438b7563edc35383417f12c8.camel@marvell.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: kernel.org; dkim=none (message not signed) header.d=none;kernel.org; dmarc=none action=none header.from=marvell.com; x-originating-ip: [173.228.7.197] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 60530ab6-8501-4f78-a3db-08d82e4f90c8 x-ms-traffictypediagnostic: MW2PR18MB2156: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:4502; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: kAcENqRTVC5LJDNWTFi0gJmqH2I+N5X/pfX1V9oBWY4/qyx7ShZZPp5Dc/7ZIfLdcXeCQk2sxHyi7MsmO3DOlAhXRtgug7/EwIVwIxWPB0Or+BHjY0GbOVv3rJXlsFLnQn8iBomnc6kszGA9291xRqBV+SNEN958jtLcVIKkjWWZJ5ir2FVeRSRoJjuZv0Cub7G6iOVGhmPfTH3gh/HrVdfswglAzLCWWGu6W2f4c/H+btRK2P7LqmJu0mR2UNIS27TlGDqVY2eKvJFNJyH/xGOHDXF0YRtKsVu0BuXx9P78Tm8MMjWgwCTFA+tMDvsBAjLJUJYkG+fipYcaboYBnw== x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:MW2PR18MB2267.namprd18.prod.outlook.com;PTR:;CAT:NONE;SFTY:;SFS:(4636009)(39860400002)(366004)(376002)(396003)(136003)(346002)(4744005)(110136005)(6486002)(2906002)(6506007)(54906003)(66476007)(478600001)(6512007)(8936002)(2616005)(8676002)(316002)(4326008)(66946007)(186003)(64756008)(86362001)(83380400001)(76116006)(91956017)(5660300002)(66446008)(36756003)(66556008)(26005)(71200400001)(7416002);DIR:OUT;SFP:1101; x-ms-exchange-antispam-messagedata: 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 Content-ID: <3D078BC1A3E6A443A62F85A300A63A00@namprd18.prod.outlook.com> MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: MW2PR18MB2267.namprd18.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 60530ab6-8501-4f78-a3db-08d82e4f90c8 X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Jul 2020 14:57:33.8038 (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: k1ncmc415f4yR0Orvm+hvx+HAnxoA9diUWrhilJ909VBki5tlOwBAVbVp/a0GwtRS+kh0xjjeGfj2mUUSdno+Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW2PR18MB2156 X-OriginatorOrg: marvell.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-07-22_08:2020-07-22,2020-07-22 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 | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 6e4cd8459f05..2f82a6daf8fc 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -268,7 +269,8 @@ static void tick_nohz_full_kick(void) */ void tick_nohz_full_kick_cpu(int cpu) { - if (!tick_nohz_full_cpu(cpu)) + smp_rmb(); + if (!tick_nohz_full_cpu(cpu) || task_isolation_on_cpu(cpu)) return; irq_work_queue_on(&per_cpu(nohz_full_kick_work, cpu), cpu);