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=-4.0 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS 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 3E7A6C43381 for ; Thu, 21 Feb 2019 20:46:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E0B83206C0 for ; Thu, 21 Feb 2019 20:46:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=armh.onmicrosoft.com header.i=@armh.onmicrosoft.com header.b="c95Tj1g8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726254AbfBUUqj (ORCPT ); Thu, 21 Feb 2019 15:46:39 -0500 Received: from mail-eopbgr130052.outbound.protection.outlook.com ([40.107.13.52]:26786 "EHLO EUR01-HE1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725866AbfBUUqi (ORCPT ); Thu, 21 Feb 2019 15:46:38 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector1-arm-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=JSMcSztNlofE3POjuyUdc8hpZ4K+7IA9Thez/3ZoQZ4=; b=c95Tj1g8/ca0dMZ5qsMQ+3QBn3R/ZSvfVmLOUFG5S2bw2yuzRG9lCZLeZ5RTtgDqwg+8VtwrU8pMGUJybBXrWG1jJLzb11uBgt68KaBiD1bf04BBuM1yFcYfAc/cZqgDGfp5nfwJDHNHkITucgNSKx3h6i9uYd+bNWky+glw/7M= Received: from VI1PR08MB2862.eurprd08.prod.outlook.com (10.170.239.138) by VI1PR08MB3151.eurprd08.prod.outlook.com (52.133.15.138) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1643.15; Thu, 21 Feb 2019 20:46:31 +0000 Received: from VI1PR08MB2862.eurprd08.prod.outlook.com ([fe80::f0d9:64f0:bde3:8c4b]) by VI1PR08MB2862.eurprd08.prod.outlook.com ([fe80::f0d9:64f0:bde3:8c4b%4]) with mapi id 15.20.1643.014; Thu, 21 Feb 2019 20:46:31 +0000 From: Julien Grall To: =?utf-8?B?Um9nZXIgUGF1IE1vbm7DqQ==?= , Julien Grall CC: Andrew Cooper , Boris Ostrovsky , Dave P Martin , Jan Beulich , Juergen Gross , Stefano Stabellini , "linux-kernel@vger.kernel.org" , xen-devel , Marc Zyngier Subject: Re: [Xen-devel] xen/evtchn and forced threaded irq Thread-Topic: [Xen-devel] xen/evtchn and forced threaded irq Thread-Index: AQHUyHjqQ66WxRXB/Uyll7tNFo7Q+qXnzhoAgADuSACAADAtAIAAEDAAgAAhZICAAAulgIAAEMAAgAAE4ICAAKi7AIAACJqAgAAKBYCAAMFVAA== Date: Thu, 21 Feb 2019 20:46:31 +0000 Message-ID: References: <20190220000209.GA4091@localhost.localdomain> <21214d47-9c68-e6bf-007a-4047cc2b02f9@oracle.com> <8f7445d7-fa50-f3e9-44f5-cc2aebd020f4@arm.com> <15bc52cb-82d8-4d2c-e5a8-c6ae8de90276@oracle.com> <5df8888a-4a29-fccd-bac2-a9c170244029@arm.com> <1574a7fe-a5ac-4bc2-d3f0-967d8d01e5f1@oracle.com> <1100e6b1-6fa8-06f0-8ecc-b0699a2ce5f4@arm.com> <20190221080752.zy2qlzb4vi7tbu3p@Air-de-Roger> <20190221091431.vqi53op37mvhi25z@Air-de-Roger> In-Reply-To: <20190221091431.vqi53op37mvhi25z@Air-de-Roger> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: LO2P123CA0011.GBRP123.PROD.OUTLOOK.COM (2603:10a6:600:a6::23) To VI1PR08MB2862.eurprd08.prod.outlook.com (2603:10a6:802:1f::10) x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [217.140.96.140] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: e778bc35-9b3c-410f-b2d2-08d6983da8d1 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600110)(711020)(4605104)(4618075)(2017052603328)(7153060)(7193020);SRVR:VI1PR08MB3151; x-ms-traffictypediagnostic: VI1PR08MB3151: x-microsoft-exchange-diagnostics: 1;VI1PR08MB3151;20:1tQyDMkYKYGl2vBj+TlR683n6gsSmchUT6cTJoY2CYWAkXHqfORmDrkOqrGhJ07+NVT7azt7/nOXohL/ZRLbRLa7icu5jf3gtKscIXntdB5jTp+GNdI/CCW5U9uGWHXdqo7gCVyIsaHd57DxDsu0R94x6ooIFuQox8hehtF7vdQ= x-microsoft-antispam-prvs: x-forefront-prvs: 09555FB1AD x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(979002)(376002)(366004)(396003)(346002)(39860400002)(136003)(40434004)(199004)(189003)(52116002)(8676002)(3846002)(81166006)(81156014)(305945005)(6486002)(54906003)(93886005)(6116002)(44832011)(486006)(446003)(99286004)(7736002)(229853002)(2906002)(66066001)(8936002)(76176011)(476003)(2616005)(71200400001)(86362001)(26005)(6512007)(36756003)(110136005)(478600001)(25786009)(6246003)(6346003)(4326008)(31686004)(6436002)(106356001)(11346002)(14454004)(71190400001)(53936002)(31696002)(386003)(105586002)(72206003)(6506007)(14444005)(256004)(53546011)(5024004)(186003)(97736004)(102836004)(316002)(68736007)(5660300002)(969003)(989001)(999001)(1009001)(1019001);DIR:OUT;SFP:1101;SCL:1;SRVR:VI1PR08MB3151;H:VI1PR08MB2862.eurprd08.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; received-spf: None (protection.outlook.com: arm.com does not designate permitted sender hosts) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Julien.Grall@arm.com; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: VMFfF/xqDu9hhZkPDcpSBaCkPjEjuwYElgUdFQ6KJ2dmWxO7ewPQNO8VQrZn0uSMZkoMM8e4Cq3OMe2n5WFdUbjSHJCT/gDX8SZN9GyuG53YodKfoU/AOAxroNe6iMjQa30rrEk0ZFBQfGVC97ZljQQFGtqGYNoM2l4fTWvTDJoxfczy77tuwuJFpN1IAtpZT762My3UCnTj3drweG/pXZEhtbarBdVW0z55UuQwF5Yc0PuLC17i0FxscKu6j9+kEIylal1axDWb56QAS5g7IyHLCXCb1CfFTESZzqKYt2axDG5UBGNJrB3QR/IqyNzYgTlJdwrNP4WCegYOQ8+0cdZgQa8ypZuHBLmrbRlHaLpB/eJ36eGgjUEfbQepYXbnIOcFbBSu3Nla7KYu53OSuYjBdSJi1IsiGpIhheIYy3s= Content-Type: text/plain; charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-Network-Message-Id: e778bc35-9b3c-410f-b2d2-08d6983da8d1 X-MS-Exchange-CrossTenant-originalarrivaltime: 21 Feb 2019 20:46:30.4740 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR08MB3151 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org SGkgUm9nZXIsDQoNCk9uIDIxLzAyLzIwMTkgMDk6MTQsIFJvZ2VyIFBhdSBNb25uw6kgd3JvdGU6 DQo+IE9uIFRodSwgRmViIDIxLCAyMDE5IGF0IDA4OjM4OjM5QU0gKzAwMDAsIEp1bGllbiBHcmFs bCB3cm90ZToNCj4+IEhpIFJvZ2VyLA0KPj4NCj4+IE9uIFRodSwgMjEgRmViIDIwMTksIDA4OjA4 IFJvZ2VyIFBhdSBNb25uw6ksIDxyb2dlci5wYXVAY2l0cml4LmNvbT4gd3JvdGU6DQo+Pg0KPj4+ IEZXSVcsIHlvdSBjYW4gYWxzbyBtYXNrIHRoZSBpbnRlcnJ1cHQgd2hpbGUgd2FpdGluZyBmb3Ig dGhlIHRocmVhZCB0bw0KPj4+IGV4ZWN1dGUgdGhlIGludGVycnVwdCBoYW5kbGVyLiBJZToNCj4+ Pg0KPj4NCj4+IFRoYW5rIHlvdSBmb3IgcHJvdmlkaW5nIHN0ZXBzLCBob3dldmVyIHdoZXJlIHdv dWxkIHRoZSBtYXNraW5nIGJlIGRvbmU/IEJ5DQo+PiB0aGUgaXJxY2hpcCBvciBhIGN1c3RvbSBz b2x1dGlvbj8NCj4NCj4gSSdtIG5vdCBmYW1pbGlhciB3aXRoIHRoZSBpcnFjaGlwIGluZnJhc3Ry dWN0dXJlIGluIExpbnV4LCB3aGF0IEkNCj4gcHJvcG9zZWQgYmVsb3cgaXMgd2hhdCBGcmVlQlNE IGRvZXMgd2hlbiBydW5uaW5nIGludGVycnVwdCBoYW5kbGVycyBpbg0KPiBkZWZlcnJlZCB0aHJl YWRzIElJUkMuDQo+DQo+IElmIGlycWNoaXAgaGFzIGEgc3BlY2lmaWMgaGFuZGxlciB0byBkaXNw YXRjaCB0byBhIHRocmVhZCwgdGhlbiB0aGF0J3MNCj4gdGhlIHBsYWNlIHdoZXJlIHRoZSBtYXNr aW5nIHNob3VsZCBoYXBwZW4uIExpa2VseSwgdGhlIHVubWFza2luZw0KPiBzaG91bGQgYmUgZG9u ZSBieSB0aGUgaXJxIGhhbmRsaW5nIGluZnJhc3RydWN0dXJlIGFmdGVyIHRoZSB0aHJlYWQNCj4g ZXhlY3V0aW5nIHRoZSBpbnRlcnJ1cHQgaGFuZGxlciBoYXMgZmluaXNoZWQuDQo+DQo+IElzbid0 IHRoZXJlIGEgc2ltaWxhciB3YXkgdG8gaGFuZGxlIGludGVycnVwdHMgaW4gdGhyZWFkcyBmb3Ig TGludXg/DQoNCkxpbnV4IGhhcyBhIGZsYWcgKElSUUZfT05FU0hPVCkgdG8gbWFzayBpbnRlcnJ1 cHQgdW50aWwgdGhlIGludGVycnVwdA0KaGFuZGxlciBoYXMgYmVlbiBydW4uIEl0IGlzIHNldCBm b3IgYWxsIGludGVycnVwdHMgaGFuZGxlciB0aGF0IGhhdmUNCmJlZW4gZm9yY2VkIHRvIGJlIHRo cmVhZGVkLg0KDQpIb3dldmVyLCBpdCBsb29rcyBsaWtlIHRoZSBmbGFnIGlzIGJlZW4gaWdub3Jl ZCBieSB0aGUgaXJxY2hpcCBoYW5kbGVyDQp3ZSB1c2UgKGhhbmRsZV9lZGdlX2lycSkuIERvaW5n IGEgYml0IG9mIGRpZ2dpbmcsIElSUUZfT05FU0hPVCB1c2UgdG8gYmUNCmhhbmRsZWQgaW4gaGFu ZGxlX2VkZ2VfaXJxIHVudGlsIHRoZSBmb2xsb3dpbmcgY29tbWl0IGZyb20gMjAwOToNCg0KY29t bWl0IDRkYmM5Y2EyMTliMGYyOTQzMzJlNzM0NTI4ZjdiODIyMTE3MDAxNzANCkF1dGhvcjogVGhv bWFzIEdsZWl4bmVyIDx0Z2x4QGxpbnV0cm9uaXguZGU+DQpEYXRlOiAgIFRodSBBdWcgMjcgMDk6 Mzg6NDkgMjAwOSArMDIwMA0KDQogICAgIGdlbmlycTogRG8gbm90IG1hc2sgb25lc2hvdCBlZGdl IHR5cGUgaW50ZXJydXB0cw0KDQogICAgIE1hc2tpbmcgb25lc2hvdCBlZGdlIHR5cGUgaW50ZXJy dXB0cyBpcyB3cm9uZyBhcyB3ZSBtaWdodCBsb3NlIGFuDQogICAgIGludGVycnVwdCB3aGljaCBp cyBpc3N1ZWQgd2hlbiB0aGUgdGhyZWFkZWQgaGFuZGxlciBpcyBoYW5kbGluZyB0aGUNCiAgICAg ZGV2aWNlLiBXZSBjYW4ga2VlcCB0aGUgaXJxIHVubWFza2VkIHNhZmVseSBhcyB3aXRoIGVkZ2Ug dHlwZQ0KICAgICBpbnRlcnJ1cHRzIHRoZXJlIGlzIG5vIGRhbmdlciBvZiBpbnRlcnJ1cHQgZmxv b2RzLiBJZiB0aGUgdGhyZWFkZWQNCiAgICAgaGFuZGxlciBoYXMgbm90IHlldCBmaW5pc2hlZCB0 aGVuIElSUVRGX1JVTlRIUkVBRCBpcyBzZXQgd2hpY2ggd2lsbA0KICAgICBrZWVwIHRoZSBoYW5k bGVyIHRocmVhZCBhY3RpdmUuDQoNCiAgICAgRGVidWdnZWQgYW5kIHZlcmlmaWVkIGluIHByZWVt cHQtcnQuDQoNCiAgICAgU2lnbmVkLW9mZi1ieTogVGhvbWFzIEdsZWl4bmVyIDx0Z2x4QGxpbnV0 cm9uaXguZGU+DQoNCkZ1cnRoZXJtb3JlLCBpdCBpcyBwcmV0dHkgY2xlYXIgZnJvbSB0aGUgY29t bWVudCBvbiB0b3Agb2YNCmhhbmRsZV9lZGdlX2lycSB0aGF0IHRoZSBzYW1lIGludGVycnVwdCBj YW4gY29tZS11cCBiZWZvcmUgdGhlIGZpcnN0IG9uZQ0KaXMgb25lIGlzIGhhbmRsZWQgYnkgdGhl IGFzc29jaWF0ZWQgZXZlbnQgaGFuZGxlci4NCg0KSSBhbSBzdGlsbCB0cnlpbmcgdG8gZmlndXJl IG91dCB3aGV0aGVyIHRoZSBpc3N1ZSBsaWVzIGluIHRoZSBldnRjaG4NCmRyaXZlciBvciB0aGUg WGVuIGlycWNoaXAgKGV2ZW50c19iYXNlLmMpLiBJIHdpbGwgaGF2ZSBhIGNsb3NlciBsb29rIGFu ZA0KY29tZSBiYWNrIHdpdGggdXBkYXRlcyBoZXJlLg0KDQpDaGVlcnMsDQoNCi0tDQpKdWxpZW4g R3JhbGwNCklNUE9SVEFOVCBOT1RJQ0U6IFRoZSBjb250ZW50cyBvZiB0aGlzIGVtYWlsIGFuZCBh bnkgYXR0YWNobWVudHMgYXJlIGNvbmZpZGVudGlhbCBhbmQgbWF5IGFsc28gYmUgcHJpdmlsZWdl ZC4gSWYgeW91IGFyZSBub3QgdGhlIGludGVuZGVkIHJlY2lwaWVudCwgcGxlYXNlIG5vdGlmeSB0 aGUgc2VuZGVyIGltbWVkaWF0ZWx5IGFuZCBkbyBub3QgZGlzY2xvc2UgdGhlIGNvbnRlbnRzIHRv IGFueSBvdGhlciBwZXJzb24sIHVzZSBpdCBmb3IgYW55IHB1cnBvc2UsIG9yIHN0b3JlIG9yIGNv cHkgdGhlIGluZm9ybWF0aW9uIGluIGFueSBtZWRpdW0uIFRoYW5rIHlvdS4NCg==