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 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 150EBC636D3 for ; Mon, 6 Feb 2023 16:15:06 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3FD3810E814; Mon, 6 Feb 2023 16:15:05 +0000 (UTC) Received: from NAM11-CO1-obe.outbound.protection.outlook.com (mail-co1nam11on2067.outbound.protection.outlook.com [40.107.220.67]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6084510E814; Mon, 6 Feb 2023 16:15:03 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=lksoR2Z8QRKmeoAvHYHxfRAIObOfGOyxo8cK9oKdKew8w/solzspapbiaORmXPD3rG0XtSk0bkETcgjtIDBP+MQ7Zy8GmEIOgy+HTSiKz+8oqRkiRzbereejEDVUQIWAOb3Vz8Q8r0zqtboCRvJ54P9PCwdDh0f/zM/F4N0sm8ncxRRwGR94vAkHxpGL/yloYvRJYcKv2gBC6wFX94nYlfaSrJFlqkGp0ZB6mJjHdlRpjHREigVGX2D9989COLGOJa2c1G2CDEHDc2/S7PHJHdYFCVt7laopub+BCk7L46/0okV9qtatMRQrb6OlcnAYFJYjBJWsnvn88g3uag53rw== 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-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=ieKBmWLrrQzdTtcMGPgc2sBfRtpXnGnIHgrfCI5toi8=; b=aLN+p75XEXlH4B4MvGi3QJWuukAiEKM3XuDkB2hF9YE453wuD+qijyKgTbuWiX6YoPcohs4TOWgQFHXYfRU6oUMOiRKY9XE3Qp5cjQeogcGyqjm2B/Ek5NWbGM8TRX6PDThak1Jx6oxRBySyQGNqG3IEqjZ1hmIuGkFgJlNFCJoPVv5+qPAswrFjeUkFgZbMeHhxHH9Om6SWBd41opncPrw1e4c5qy0XYLNstSCfBXSt4Ij0blAyvfxRM8ZTibi76vGEI0Q696zyPp9Rr7lcEetkw3VjpHg3HKa7DosIjHdAZ/zP9DEKEKY/goINpQpIM6Q3byf7zhYBwV1P1fzkHg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=amd.com; dmarc=pass action=none header.from=amd.com; dkim=pass header.d=amd.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=ieKBmWLrrQzdTtcMGPgc2sBfRtpXnGnIHgrfCI5toi8=; b=3I6M3fE4ZtaRriLndJ8aPJwYRFm4b5tEUQ81APJVLJOj/ggVC/c10RBynCnjR7TNDeAg7cgFT7kavEzBIGLLQ0KQRnVLfky/G3Ojw95LTiBLH5GgTHi9BBODj776sLNOHTOKo4lwAGl8Ftm7f1mB+aZaK5U7jFE4KEasJcVo/2Q= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=amd.com; Received: from BN8PR12MB3587.namprd12.prod.outlook.com (2603:10b6:408:43::13) by SJ0PR12MB5408.namprd12.prod.outlook.com (2603:10b6:a03:305::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6064.34; Mon, 6 Feb 2023 16:15:01 +0000 Received: from BN8PR12MB3587.namprd12.prod.outlook.com ([fe80::2e4f:4041:28be:ba7a]) by BN8PR12MB3587.namprd12.prod.outlook.com ([fe80::2e4f:4041:28be:ba7a%6]) with mapi id 15.20.6064.032; Mon, 6 Feb 2023 16:15:01 +0000 Message-ID: Date: Mon, 6 Feb 2023 17:14:54 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.2 Subject: Re: [Nouveau] [PATCH drm-next 05/14] drm/nouveau: new VM_BIND uapi interfaces Content-Language: en-US To: Danilo Krummrich , Dave Airlie References: <20230118061256.2689-1-dakr@redhat.com> <20230118061256.2689-6-dakr@redhat.com> <7c046ff9-728d-7634-9d77-8536308c7481@redhat.com> <2427a918-5348-d1ef-ccae-a29c1ff33c83@redhat.com> <3a76bfa9-8ee5-a7d9-b9fb-a98181baec0b@redhat.com> <49ac3f95-6eda-9009-4b28-0167213301b2@amd.com> <15fb0179-c7c5-8a64-ed08-841189919f5e@redhat.com> <1840e9fb-fd1b-79b7-4238-54ae97333d0b@amd.com> <3f935a7e-fede-2bad-c029-4a3af850c9b5@redhat.com> <95d0631b-545c-ea4d-7439-75422e9a9120@amd.com> <67958920-c5bb-a0f5-2306-e3ae4fdbaeb3@redhat.com> From: =?UTF-8?Q?Christian_K=c3=b6nig?= In-Reply-To: <67958920-c5bb-a0f5-2306-e3ae4fdbaeb3@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: FR3P281CA0029.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:1c::22) To BN8PR12MB3587.namprd12.prod.outlook.com (2603:10b6:408:43::13) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN8PR12MB3587:EE_|SJ0PR12MB5408:EE_ X-MS-Office365-Filtering-Correlation-Id: 545af347-bbb0-4c61-8112-08db085d4c8a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:BN8PR12MB3587.namprd12.prod.outlook.com; PTR:; CAT:NONE; SFS:(13230025)(4636009)(396003)(136003)(39860400002)(346002)(366004)(376002)(451199018)(36756003)(316002)(110136005)(6512007)(31696002)(86362001)(31686004)(186003)(6506007)(2906002)(66476007)(4744005)(66556008)(7416002)(4326008)(8936002)(8676002)(5660300002)(41300700001)(2616005)(6486002)(6666004)(478600001)(66946007)(38100700002)(83380400001)(45980500001)(43740500002); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?RFg0YzhwVSsvelErNXcwcmJ3L2xiTVZxeGlaTDN2a1huNHBwa0NHeXk2NWxk?= =?utf-8?B?bGIzaTNLb3BTaFpxeFBtTzFlbUpFMWRDZFJIbWtsTHF4bU1kSnhoSmxGK2NI?= =?utf-8?B?NnkreHFuVGdoeWQxUEhtaStiV1UrTmlQcndJOHU5SHNBb0t1TzZLQ0UxaC8z?= =?utf-8?B?bDU1NlpMTS9TakJlWWE4TCtFaXQ1a1NqZkdRWFd4R21SQ1NYdTFEc3UwR082?= =?utf-8?B?cU9seExYSHo1cE53RlFSa3k1L2NQRUJYdU9VcDNUKzB2SStwNDBQSWJKd0lP?= =?utf-8?B?Q09TemF0d3ZuSjZvYTNoRFJMZ0JGSHJrOVpPNEkvNk1YTDYwSi9UY3E5TXF3?= =?utf-8?B?T3ZuTWt0eDRIUWZLVmJaTEZsY0s0OGF1U1ZKbStybGdlR2tvZFREZkpKL3Rt?= =?utf-8?B?WGFweHAvTVM4MFJtUkYrMm0yU0pCNUVCRTF3UnhkLzJERlZvTFc2UDhBNCtZ?= =?utf-8?B?S2xrVEhPSHhaRHA0TVRQenhzbFdoS2JpTDhIakFBdUx4dzJra3dLYkJ5TGFL?= =?utf-8?B?Q0lPRHlzNHR5SW1ZN1RHWHFuSWlWc3BSWkpMQkJaR05SZnprVnVRakV1TXpD?= =?utf-8?B?VjN1YS9DdmpRaWh4TFUzeHdCOHA1cE5MODRFWTJqbXFCZmxFdksvNXZtSkRy?= =?utf-8?B?eEsvby9iaWVQVU9DSUJaeVZDV2pSRlg5RTRpZ3c0M0RGQ3BEaCsrQzgwcks1?= =?utf-8?B?bFhUNkhGekl0SUtSaFZMK0xXc3ZBLzkyMi9BbnQraHV4V2RZNG5OMjAyRDY3?= =?utf-8?B?amxiQS8rbTVYblYxcDBQQk1ucHJlcnIrYXUvYmM4V2w2eWhOVXZrcllrckFk?= =?utf-8?B?dW9aM08vRzdMSVo5K0loYnhxb2E3VXJhWHdDMGRML01MSmJaaHdPYXJuS0Ey?= =?utf-8?B?RnhreDhwdUV4cEZXM3NLU2J4dHhMS0l0VHdHREpONmdrMEx4ckRxeFl1c2Rl?= =?utf-8?B?T0x0NU1mNnVYZHpCdUZtbTFEbmhaam81dUh6OEMvdk1Yd1lPYWx6YS9JMXhk?= =?utf-8?B?NEVTY01tM1lIajNpWm9MOHlQWG9kRmJxSDcwMFNtZloyOGhkL2diOS9FTEc0?= =?utf-8?B?NHJ3eldBMU56eGE2Ujc0NzJsZGtLQkNQK3ArdS9HMzV3WHBFYngrcW1mRTZj?= =?utf-8?B?amJCMXRzSFhIYVAvVnZqdTB5ajJjZTVuY3JNVjY5T3kzU2NXRkp0THExamFx?= =?utf-8?B?eERuQWVrTjlBRWFmdWV1bnBJd0ZGbThCdGVKSTFqcnUrc1JoNUo4QVp5cmZ1?= =?utf-8?B?QkpINmdmRnVpNzd1eU01UlI0WlFnS0VHOUo0OStVVm9aQ3VRdUYzUlRQMU01?= =?utf-8?B?RXQzNFNyRTY1OW5kUjYvazhkUDVqTmJPaXNuRnNGTkRkZ0ZGbm5zUWFZeGNk?= =?utf-8?B?K3lkOHRiOU5zcjNBakVYUFVOMHpQWkJzTkx3OWVWMVlMRzhpRDdDNStqN0gr?= =?utf-8?B?TURSV0JWQTJ1MGxPdGdwMlgxWWM2bjFYUHYrWjFrZGpKZmIxR21xN3VGL3pl?= =?utf-8?B?QWp0RmdLVXdQQkxYN0JUSFovS2tBVXkydHVTcFpCejNLdGsvSHM1WDZvZEdi?= =?utf-8?B?bms4OGIxRWRxdnFyYmwxUGpVYVVDWWt3dnB0aEJ5UFp1UTdPaS9vTzFQa3BT?= =?utf-8?B?M1AwbGJ1UU9mQ1JnTmRWWjJ4SWdWNjU4blF1cDdYdms0RXY2WnFYYzBVczFE?= =?utf-8?B?dnYvZFhKQmFFUWlETzNCb3FjZng3Nk1vbmRGbmlVb1Vka3Z4Y1FyL213YUJi?= =?utf-8?B?ZnZDVzd3akZFbmU5WEtpRGRJcldhdGxPZTl5Q1JKTytPZUY2T0VpZ1dBdE9W?= =?utf-8?B?SWN3a1doSkp4TUZpY0lQNGhpTVdzcEh2alYxMTFFWEJQQ0FPSFByUVFCMXl1?= =?utf-8?B?dkRjZ0RoaFdLNXRha3M4Y1ZWemZPejB6eEtjWGxjbWJVLzJFYVM3WHBjdGd1?= =?utf-8?B?M2NvcHRMdnV2b2tiMm9abi9GY3ZQSm5tZzVGZzFIY1l2RHY4TkpCbnR5dWcx?= =?utf-8?B?U01WTmVkeERoNSsyVitoOHRSSytaN2M0WXgvbEM4Y2JJdzNhYXQvT25mS1pB?= =?utf-8?B?T0hyTndnSXFnU09nYmtJVk8vM2kreUlmZVh1dHJ3ajR5cEQ1dlBVbFRRaGkv?= =?utf-8?B?NUJORmVsNXVIVGp2TFJWMnFwU3JyQVBrN2NSTnB5dncrMXdFbk1XRDEwdnFH?= =?utf-8?Q?bsYD+PPXmVE8TSZHBSDzA0lPKG3U9hn117cjOQweEgtt?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 545af347-bbb0-4c61-8112-08db085d4c8a X-MS-Exchange-CrossTenant-AuthSource: BN8PR12MB3587.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Feb 2023 16:15:01.5464 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: ny9pO6KBM6hIhN8Oizxqr9RFBcVpgfCL6PbOuG/tYj2OUdvU0Uygdf10N4UZaRzZ X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB5408 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Matthew Brost , jason@jlekstrand.net, linux-doc@vger.kernel.org, nouveau@lists.freedesktop.org, corbet@lwn.net, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, airlied@redhat.com, bskeggs@redhat.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Concentrating this discussion on a very big misunderstanding first. Am 06.02.23 um 14:27 schrieb Danilo Krummrich: > [SNIP] > My understanding is that userspace is fully responsible on the parts > of the GPU VA space it owns. This means that userspace needs to take > care to *not* ask the kernel to modify mappings that are in use currently. This is a completely wrong assumption! Take a look at what games like Forza Horizzon are doing. Basically that game allocates a very big sparse area and fills it with pages from BOs while shaders are accessing it. And yes, as far as I know this is completely valid behavior. So you need to be able to handle this case anyway and the approach with the regions won't help you at all preventing that. Regards, Christian.