From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9A3B4C63697 for ; Mon, 23 Nov 2020 18:00:39 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id AED4E206B2 for ; Mon, 23 Nov 2020 18:00:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="eFiRwd5E"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=marvell.com header.i=@marvell.com header.b="BbhyOL8b"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=marvell.onmicrosoft.com header.i=@marvell.onmicrosoft.com header.b="lOcVajST" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AED4E206B2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=marvell.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Content-ID:In-Reply-To:References: Message-ID:Date:Subject:To:From:Reply-To:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=6XY2ixSCO/IMkplJXjlpNWwAPKwnHmTxRYsKafHlAFQ=; b=eFiRwd5Epregxh3TmQYGXiP7f EmhP0VIgMxgD5nSbZE2JZJ+SKC6ZOLVIjmYi9HOrXJXpQQDx6AsujBPEpwEdPLZi/JAj+1snu0g3J Gt7Jw90r3jSsmhjt2TxMCmyGNZmVmOpvc1A0WQQ6AO4InQG0gIu5senENSzLwdqdg2prL+++Yyp4e IRecZE9GS/myj4Ccs8c6IcGtKfgv5gyRJRF8kYiMrncnpWvLaS6dqXRfV+B+xaAfm/H8Vpt0ZJ+qB AgAE4K8ZdHmmntT9GT6PveyqSaxDRZ0fVamNLVxwczTPVeJ06ReEfIFdMYNohQGUmJzopx7YQ61ui EEoJaPa0Q==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1khG7F-0006aA-93; Mon, 23 Nov 2020 17:59:05 +0000 Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1khG75-0006XY-7o for linux-arm-kernel@lists.infradead.org; Mon, 23 Nov 2020 17:58:56 +0000 Received: from pps.filterd (m0045851.ppops.net [127.0.0.1]) by mx0b-0016f401.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 0ANHsiJi021464; Mon, 23 Nov 2020 09:58:27 -0800 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=pfpt0220; bh=XdATJSpoCgQBdRF9UUyxPd2r0o++/lQNfaFSdjxtaio=; b=BbhyOL8bI+qLInsoDEBV4Gh2RhZE6I8nG5iic6BNhBrnGPfKcxlQe2+321PeHialYBFJ kUSmTq57XTlmMVdpUX2l/efei25QJjeueQb/zL5GD8SCtmnu3cpwHXYeQxndVtBxTb52 eGtKS8fCDh0q1nZ/41pn0OdZKUEXcSsMMl4QC4gaAvW2auanEBxTBntAaS0KfCb/Fk9p h0TZsRflp4CGw6qCbt0r16DL6P7dAUO8TzURXtNddraB9JIgf6n/1uDVLCYiC47Snfpy uUwsUi4KntTr4tJtDDKwU5cVU/bS7AfS55pdEB+DnaJzuaENul09lbsmSgVikOAXQCtK 5A== Received: from sc-exch03.marvell.com ([199.233.58.183]) by mx0b-0016f401.pphosted.com with ESMTP id 34y39r6dnj-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Mon, 23 Nov 2020 09:58:26 -0800 Received: from DC5-EXCH01.marvell.com (10.69.176.38) by SC-EXCH03.marvell.com (10.93.176.83) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 23 Nov 2020 09:58:25 -0800 Received: from SC-EXCH03.marvell.com (10.93.176.83) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 23 Nov 2020 09:58:24 -0800 Received: from NAM11-BN8-obe.outbound.protection.outlook.com (104.47.58.169) by SC-EXCH03.marvell.com (10.93.176.83) with Microsoft SMTP Server (TLS) id 15.0.1497.2 via Frontend Transport; Mon, 23 Nov 2020 09:58:23 -0800 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=CuAxJmgA65qMso3rrvrDr1n7+75yRPhkcvaQcSRGedTTNl7GJAbcrpw+j8IPtwEzh8tdf8Raqt0l6h0gCEmHV2Dqa+JxTSa0zMkt4taqeFNFqnO63VR5YjdP5icdbfL+muK6L/e4JIvmLFBSvit3vhHgALd/g4dGzDpVtvisvUZyb91J7L2OKDa9ZCOdI0admNZYPvjtCqxyWtlbDHV2Jev/bqdKx0wof/RbFe4lxrLiopGcFxLwL0DYEFAmLmZHXLAov67aKuYJcjFYKPtNoXY9tup0Ku2aen/j0fWrLvGQZOKA7Ne7zMPcqdUhQ1Wd397nrCPPkMjLfX2hQexIFg== 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=XdATJSpoCgQBdRF9UUyxPd2r0o++/lQNfaFSdjxtaio=; b=UcTgJSBwF3lXkz0NVHtkLVcAzm0DcLgojBQABjldmeHZc2bRZ1lxxvIOVJz82vkcecdO9VQk4OjZf3h3eoUlVgODc/EWCFkY6U9OjYQSQfjbQ4oh5OzP3X49UAoCCR4GTerM9/Gn9VyFbzRacyowPMPxrsxqwsR4ONNIZqHzDgFcvwQlZTO81bCS0N8PKnrdsWLGGmjzJ/UvDdbaQAgL1b9K5Sj0gO6XFBQFJCZYLdL6+nIy5Asbg9dJslOnL5h8nO/pJH3U6Nf75QyhqhjXncLlvzqUG36ym69NF1WPG1LPEUbqIgde20Y/0s9xvzs7LxijowcEMaSWYM/LvuxDVw== 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=XdATJSpoCgQBdRF9UUyxPd2r0o++/lQNfaFSdjxtaio=; b=lOcVajSTeCkc/woZt0aYFJn7FrBX8L2sRFdlA3vSfEVojjWk/gAt1nr7TsbAsR1VSw3t/cOPkBIv3RKyXuy9gxle9NANEzrve3nm5DhWhQ+c4MrsUvuewNje284afdL/iJ4BTka5KuMIo8U4Etw6j07oBFXDREftlmVnziGRKg8= Received: from MW2PR18MB2267.namprd18.prod.outlook.com (2603:10b6:907:3::11) by MW3PR18MB3530.namprd18.prod.outlook.com (2603:10b6:303:55::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3589.22; Mon, 23 Nov 2020 17:58:22 +0000 Received: from MW2PR18MB2267.namprd18.prod.outlook.com ([fe80::e17f:37fb:4eb3:c703]) by MW2PR18MB2267.namprd18.prod.outlook.com ([fe80::e17f:37fb:4eb3:c703%4]) with mapi id 15.20.3564.039; Mon, 23 Nov 2020 17:58:23 +0000 From: Alex Belits To: "nitesh@redhat.com" , "frederic@kernel.org" Subject: [PATCH v5 7/9] task_isolation: don't interrupt CPUs with tick_nohz_full_kick_cpu() Thread-Topic: [PATCH v5 7/9] task_isolation: don't interrupt CPUs with tick_nohz_full_kick_cpu() Thread-Index: AQHWwcI7UCf8Z8jL1UuRW32Ea/eUhA== Date: Mon, 23 Nov 2020 17:58:22 +0000 Message-ID: <76ed0b222d2f16fb5aebd144ac0222a7f3b87fa1.camel@marvell.com> References: <8d887e59ca713726f4fcb25a316e1e932b02823e.camel@marvell.com> In-Reply-To: <8d887e59ca713726f4fcb25a316e1e932b02823e.camel@marvell.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: redhat.com; dkim=none (message not signed) header.d=none;redhat.com; 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: cea56759-e00c-492c-c81a-08d88fd95e8f x-ms-traffictypediagnostic: MW3PR18MB3530: 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: bLDrjD+9lnjmxV9F+EySYhTlotHp0FjHcIrUjdVoLAAQB42DwvoeHFRaze9tSdD9xhLp6rrPvcOB3gfcpBLiT6/FzHK/Gy3OcyBHqDtg/0rlusiRnAkWp5msAAors4tcvLB5rlAVta1bsYvtgjAPpCkGmW4j2AFWzwZpIK/4auTBrCEwg2wGf7imgb+LlQMtGG1xvRSmcOgheJPx4rArZeVqMWg8hzA4bHpJ/LEu4oUcScONx0oFG4RfxChgZXVVugMFcYajRWbQ4y23MWqd58rYdpZS+awTylWWLq4e1Ot2oWLt76QR6GAoN6l/HibttQFndlK7CgeSRYoIq/UugQ== 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; SFS:(4636009)(366004)(346002)(376002)(39860400002)(136003)(396003)(2906002)(2616005)(71200400001)(5660300002)(6512007)(83380400001)(110136005)(26005)(54906003)(6486002)(186003)(6506007)(36756003)(66946007)(8676002)(316002)(478600001)(8936002)(86362001)(7416002)(66476007)(66556008)(64756008)(66446008)(91956017)(76116006)(4744005)(4326008); DIR:OUT; SFP:1101; x-ms-exchange-antispam-messagedata: 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 Content-ID: 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: cea56759-e00c-492c-c81a-08d88fd95e8f X-MS-Exchange-CrossTenant-originalarrivaltime: 23 Nov 2020 17:58:22.8372 (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: zDAfApfUXSDuufDXRJM2KfzvBkMCj8DhqrMEZsiXfnjqCpS/9SI3IthFoAh3bRarU9naR263bnE32olvyY5aug== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW3PR18MB3530 X-OriginatorOrg: marvell.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312, 18.0.737 definitions=2020-11-23_17:2020-11-23, 2020-11-23 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201123_125855_385804_30B360AB X-CRM114-Status: GOOD ( 18.08 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "linux-arch@vger.kernel.org" , "pauld@redhat.com" , "catalin.marinas@arm.com" , "peterz@infradead.org" , Prasun Kapoor , "mtosatti@redhat.com" , "linux-kernel@vger.kernel.org" , "rostedt@goodmis.org" , "davem@davemloft.net" , "leon@sidebranch.com" , "netdev@vger.kernel.org" , "peterx@redhat.com" , "trix@redhat.com" , "tglx@linutronix.de" , "linux-api@vger.kernel.org" , "will@kernel.org" , "mingo@kernel.org" , "linux-arm-kernel@lists.infradead.org" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+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 | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index a213952541db..6c8679e200f0 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); -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel