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Tue, 29 Oct 2019 22:56:29 +0000 From: Jason Gunthorpe To: "Kuehling, Felix" CC: "linux-mm@kvack.org" , Jerome Glisse , Ralph Campbell , John Hubbard , "linux-rdma@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , "amd-gfx@lists.freedesktop.org" , "Deucher, Alexander" , Ben Skeggs , Boris Ostrovsky , "Koenig, Christian" , "Zhou, David(ChunMing)" , Dennis Dalessandro , Juergen Gross , Mike Marciniszyn , Oleksandr Andrushchenko , Petr Cvek , Stefano Stabellini , "nouveau@lists.freedesktop.org" , "xen-devel@lists.xenproject.org" , Christoph Hellwig , Andrea Arcangeli , Michal Hocko Subject: Re: [PATCH v2 02/15] mm/mmu_notifier: add an interval tree notifier Thread-Topic: [PATCH v2 02/15] mm/mmu_notifier: add an interval tree notifier Thread-Index: AQHVjcvJYOye0EiwZkisYK74G5bmhqdyLieAgAAObYA= Date: Tue, 29 Oct 2019 22:56:29 +0000 Message-ID: <20191029225623.GV22766@mellanox.com> References: <20191028201032.6352-1-jgg@ziepe.ca> <20191028201032.6352-3-jgg@ziepe.ca> <786ee79d-00a6-9147-f410-d8856da35511@amd.com> In-Reply-To: <786ee79d-00a6-9147-f410-d8856da35511@amd.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: BL0PR01CA0001.prod.exchangelabs.com (2603:10b6:208:71::14) To VI1PR05MB4141.eurprd05.prod.outlook.com (2603:10a6:803:44::15) authentication-results: spf=none (sender IP is ) smtp.mailfrom=jgg@mellanox.com; x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [142.162.113.180] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 45c12942-a2fc-4228-92e1-08d75cc33c42 x-ms-traffictypediagnostic: VI1PR05MB6205: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:9508; x-forefront-prvs: 0205EDCD76 x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(4636009)(366004)(376002)(396003)(346002)(136003)(39860400002)(199004)(189003)(71190400001)(316002)(6916009)(33656002)(7736002)(36756003)(305945005)(6436002)(7416002)(229853002)(6486002)(6246003)(478600001)(4326008)(6512007)(25786009)(6116002)(3846002)(66476007)(66556008)(66946007)(66446008)(66066001)(64756008)(71200400001)(186003)(26005)(4744005)(1076003)(5660300002)(6506007)(2906002)(86362001)(2616005)(8676002)(54906003)(102836004)(52116002)(76176011)(386003)(99286004)(14454004)(8936002)(486006)(11346002)(446003)(476003)(256004)(81166006)(81156014);DIR:OUT;SFP:1101;SCL:1;SRVR:VI1PR05MB6205;H:VI1PR05MB4141.eurprd05.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; received-spf: None (protection.outlook.com: mellanox.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: lh2orI0kJEeyfgpwY1E6ptwTbkmI1Vjnqs1LG96d9SEbAFltL3UFCVKArZ7eQOJhLX0h1MQdvZI3Qwo1AmYNL4RqWOXJzY/W+XnsfarL7a3Ld/sTnnpyy937QyvGB3JglcYjUcv688xPuOSDTrqf4bAQg4EWQ5pdxyfnoA5Sk+JsbxaLBHStAJGTa2eE2cyQpCbWZNj6iZBihzUgxkCAOXQ44bcFazpFi5zE7OTLpqyo/+G3MP8KhkxV+27CJ/u1k81z2B99poGAGQ7V2ZGK48VtM26kv72vUF/thZr2nypTwWPkzDiVTU8/bL/9mHxQFxUy8AXgl0PdSRn905upHoXBSZiwCfPlVxiTbYq9KrLL67e/N7xWt1qGjeHPSmgY1Muk4I4wNFBf4lUwLsK0ejNqW2SNcAh8aDvRm0mwn/kEhGkU3l6jTMtNWm8VVFOP x-ms-exchange-transport-forked: True Content-Type: text/plain; charset="us-ascii" Content-ID: <0D908830E600514D9CA283269F446301@eurprd05.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: Mellanox.com X-MS-Exchange-CrossTenant-Network-Message-Id: 45c12942-a2fc-4228-92e1-08d75cc33c42 X-MS-Exchange-CrossTenant-originalarrivaltime: 29 Oct 2019 22:56:29.7157 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: a652971c-7d2e-4d9b-a6a4-d149256f461b X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: Z4aYdaT7RAAAmsgmq3y2doK/qlWzq9wJ+GS8jT3kaPqsHgvp56u9tu6WMgMc19uJJ8cvyxwTX73GTlvXoDZ38A== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR05MB6205 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org On Tue, Oct 29, 2019 at 10:04:45PM +0000, Kuehling, Felix wrote: > > * because mm->mm_users > 0 during mmu_notifier_register and exit_mma= p > > @@ -52,17 +286,24 @@ struct mmu_notifier_mm { > > * can't go away from under us as exit_mmap holds an mm_count pin > > * itself. > > */ > > -void __mmu_notifier_release(struct mm_struct *mm) > > +static void mn_hlist_release(struct mmu_notifier_mm *mmn_mm, > > + struct mm_struct *mm) > > { > > struct mmu_notifier *mn; > > int id; > > =20 > > + if (mmn_mm->has_interval) > > + mn_itree_release(mmn_mm, mm); > > + > > + if (hlist_empty(&mmn_mm->list)) > > + return; >=20 > This seems to duplicate the conditions in __mmu_notifier_release. See my= =20 > comments below, I think one of them is wrong. I suspect this one,=20 > because __mmu_notifier_release follows the same pattern as the other=20 > notifiers. Yep, this is a rebasing error from a earlier version, the above two lines should be deleted. I think it is harmless so it should not impact any testing. Thanks, Jason From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Gunthorpe Subject: Re: [PATCH v2 02/15] mm/mmu_notifier: add an interval tree notifier Date: Tue, 29 Oct 2019 22:56:29 +0000 Message-ID: <20191029225623.GV22766@mellanox.com> References: <20191028201032.6352-1-jgg@ziepe.ca> <20191028201032.6352-3-jgg@ziepe.ca> <786ee79d-00a6-9147-f410-d8856da35511@amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <786ee79d-00a6-9147-f410-d8856da35511@amd.com> Content-Language: en-US Content-ID: <0D908830E600514D9CA283269F446301@eurprd05.prod.outlook.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: "Kuehling, Felix" Cc: "nouveau@lists.freedesktop.org" , "dri-devel@lists.freedesktop.org" , Michal Hocko , "linux-mm@kvack.org" , Andrea Arcangeli , "Zhou, David(ChunMing)" , Stefano Stabellini , Oleksandr Andrushchenko , "linux-rdma@vger.kernel.org" , "amd-gfx@lists.freedesktop.org" , Christoph Hellwig , Ben Skeggs , "xen-devel@lists.xenproject.org" , Ralph Campbell , John Hubbard , Jerome Glisse , Boris Ostrovsky , Petr Cvek , Juergen Gross List-Id: nouveau.vger.kernel.org T24gVHVlLCBPY3QgMjksIDIwMTkgYXQgMTA6MDQ6NDVQTSArMDAwMCwgS3VlaGxpbmcsIEZlbGl4 IHdyb3RlOgoKPiA+ICAgICogYmVjYXVzZSBtbS0+bW1fdXNlcnMgPiAwIGR1cmluZyBtbXVfbm90 aWZpZXJfcmVnaXN0ZXIgYW5kIGV4aXRfbW1hcAo+ID4gQEAgLTUyLDE3ICsyODYsMjQgQEAgc3Ry dWN0IG1tdV9ub3RpZmllcl9tbSB7Cj4gPiAgICAqIGNhbid0IGdvIGF3YXkgZnJvbSB1bmRlciB1 cyBhcyBleGl0X21tYXAgaG9sZHMgYW4gbW1fY291bnQgcGluCj4gPiAgICAqIGl0c2VsZi4KPiA+ ICAgICovCj4gPiAtdm9pZCBfX21tdV9ub3RpZmllcl9yZWxlYXNlKHN0cnVjdCBtbV9zdHJ1Y3Qg Km1tKQo+ID4gK3N0YXRpYyB2b2lkIG1uX2hsaXN0X3JlbGVhc2Uoc3RydWN0IG1tdV9ub3RpZmll cl9tbSAqbW1uX21tLAo+ID4gKwkJCSAgICAgc3RydWN0IG1tX3N0cnVjdCAqbW0pCj4gPiAgIHsK PiA+ICAgCXN0cnVjdCBtbXVfbm90aWZpZXIgKm1uOwo+ID4gICAJaW50IGlkOwo+ID4gICAKPiA+ ICsJaWYgKG1tbl9tbS0+aGFzX2ludGVydmFsKQo+ID4gKwkJbW5faXRyZWVfcmVsZWFzZShtbW5f bW0sIG1tKTsKPiA+ICsKPiA+ICsJaWYgKGhsaXN0X2VtcHR5KCZtbW5fbW0tPmxpc3QpKQo+ID4g KwkJcmV0dXJuOwo+IAo+IFRoaXMgc2VlbXMgdG8gZHVwbGljYXRlIHRoZSBjb25kaXRpb25zIGlu IF9fbW11X25vdGlmaWVyX3JlbGVhc2UuIFNlZSBteSAKPiBjb21tZW50cyBiZWxvdywgSSB0aGlu ayBvbmUgb2YgdGhlbSBpcyB3cm9uZy4gSSBzdXNwZWN0IHRoaXMgb25lLCAKPiBiZWNhdXNlIF9f bW11X25vdGlmaWVyX3JlbGVhc2UgZm9sbG93cyB0aGUgc2FtZSBwYXR0ZXJuIGFzIHRoZSBvdGhl ciAKPiBub3RpZmllcnMuCgpZZXAsIHRoaXMgaXMgYSByZWJhc2luZyBlcnJvciBmcm9tIGEgZWFy bGllciB2ZXJzaW9uLCB0aGUgYWJvdmUgdHdvCmxpbmVzIHNob3VsZCBiZSBkZWxldGVkLgoKSSB0 aGluayBpdCBpcyBoYXJtbGVzcyBzbyBpdCBzaG91bGQgbm90IGltcGFjdCBhbnkgdGVzdGluZy4K ClRoYW5rcywKSmFzb24KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbnByb2plY3Qu b3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvbWFpbG1hbi9saXN0aW5mby94ZW4tZGV2 ZWw= 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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 11B63CA9EAF for ; 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