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Wed, 10 Feb 2021 11:45:04 +0000 Subject: Re: drm/nouneau: 5.11 cycle regression bisected to 461619f5c324 "drm/nouveau: switch to new allocator" To: Mike Galbraith , lkml Cc: nouveau@lists.freedesktop.org, Ben Skeggs , Dave Airlie References: <1d663cd74af91e23f4f24ebbdd65ef3ba72c15fc.camel@gmx.de> <43924195-c4e1-fce4-5766-aaefe2d6f766@amd.com> <2793c200beb530ed4a8ac32c5eea0f5aaa53c7e8.camel@gmx.de> <41cc52bd57a466f29ea81676d42f57a7b9da7dd8.camel@gmx.de> From: =?UTF-8?Q?Christian_K=c3=b6nig?= Message-ID: <5df26bda-9ff8-168f-e5a3-0bb503ffcca9@amd.com> Date: Wed, 10 Feb 2021 12:44:59 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 In-Reply-To: <41cc52bd57a466f29ea81676d42f57a7b9da7dd8.camel@gmx.de> Content-Type: text/plain; charset=iso-8859-15; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-Originating-IP: [2a02:908:1252:fb60:1e1:ad6e:a509:1753] X-ClientProxiedBy: AM0PR06CA0124.eurprd06.prod.outlook.com (2603:10a6:208:ab::29) To MN2PR12MB3775.namprd12.prod.outlook.com (2603:10b6:208:159::19) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [IPv6:2a02:908:1252:fb60:1e1:ad6e:a509:1753] (2a02:908:1252:fb60:1e1:ad6e:a509:1753) by AM0PR06CA0124.eurprd06.prod.outlook.com (2603:10a6:208:ab::29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3846.25 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: =?iso-8859-15?Q?kjASZ5mvhBN00keLwCsus31hZYpXWJo+1HsUfne+U9iAQlTf2ruLaPuIP?= =?iso-8859-15?Q?G5oFZt6LQRNit3qVlzPvpvm4NCyqOGFi9AAkQhKh2X3wJlh7ZiRo/2NYR?= =?iso-8859-15?Q?G3+I+cjRv/5DJsWzkpXfohOUyT8vjt+rmKUNCe9GhHGSwHxS5oovVx+a9?= =?iso-8859-15?Q?Jp1ujO+wvSBbaevekrgn7Of9d9dnas2YSgYZlKEg+4WNe64PAgTXKFyVZ?= =?iso-8859-15?Q?X2bFWn9IlpcXxPW/DnA9QBVLjg++V4555qxUkXJgeZW/aXDGJfpZQM5Dz?= =?iso-8859-15?Q?0AMYA+75u+7I/0oKeFXsBvAccps9oTeRoRUaOxHM/LD7u0nK2fvMSD6PC?= =?iso-8859-15?Q?uhWKl2+BUpAeie1+LOrRUK9f1Eq75TLXxJ3OFpHwjqoItQADB6CEPOouM?= =?iso-8859-15?Q?7iQGOdau278MagE7qto7BbQBmNENEeBdMhjw3VgTanUdhSRKG+VoXPieS?= =?iso-8859-15?Q?kBE7Ak/NMj8mt6QknklFIsCngVxWSQuGBeWcHPGYKv8SXJcYnJ5jqBLMd?= =?iso-8859-15?Q?PNcUD1pdBs2HZ1QMTRIswNgFrGyjSvFS9S4iS+D4H/jxISgmpvtjQXa0B?= =?iso-8859-15?Q?vaQ6udtokkFuxrmNRgy99eRCgJKfBZOaoKt79lzcTh9LAfuRVMdW0LG+B?= =?iso-8859-15?Q?eOcfrWxY9ivssgg8SgJ1eFAbvAhGu3KiWndr9akALjzNH7UgKbzik8v0W?= =?iso-8859-15?Q?auW5lUNfiZV9tdt01T18TPDeuCfY9itaRBNWtaRtxZhENs5cA/IrjZgkK?= =?iso-8859-15?Q?YJLV8uJGTcajH0J4S7T9EHTYL7DFBgq9rtej+LPdlCv4U++O/c/9Ra+Xs?= =?iso-8859-15?Q?pi3D+lkR2yKDCrUI3M/dtPsqMSUvMKu6F/7cVP0SZF686WD56shXwfXoL?= =?iso-8859-15?Q?FkKd+taZjy1Tqw/7HUHvjVrVp+L61FPzph08sdJz7sdpY4pG1/HMkkYHf?= =?iso-8859-15?Q?BjtHCfXjhmZ4jCEp18tUj78W1VOPpIoIWfhO2qYblpirRKsO+3cM0HrZb?= =?iso-8859-15?Q?3XdSre0k8jtS0FfNMOTEhE9p7RN2G+649/rf26LNcUeBRN3d52iUPdtpw?= =?iso-8859-15?Q?AtrOX78iYsNrCUHCbp0BvCvDLRQpzGHQrn3a9F0H6JNWh5CZ1e+xq9Ig6?= =?iso-8859-15?Q?YuhHFZ3RT8wOou3V2wH9uASa/sl5obfAyG+1T/ah+F3s8x7ZPvJlhkTgA?= =?iso-8859-15?Q?gE+jkSCUDMX7jg9XH37eLDdeLKs01KckpL4lFGk7CkxPTJ0L+fwVR5x47?= =?iso-8859-15?Q?JFTqRKfhnKii0yYMFJ0uXvJ+ND4775/KILc7nMY5FGwebpcr4NjUrU+cB?= =?iso-8859-15?Q?+Tzw/HuxdUUC7Q6uqFtqWEVKDzY1idkONLkkbnpHpdXMLqmj3qbrk09SL?= =?iso-8859-15?Q?BsnrTuTdstWd2+HiNtH5VmFkm6gMeP+ZK/FUtQuQlvOiA+k+PTpKvQ8y/?= =?iso-8859-15?Q?saUyJyMazER5KiH0V0QRvBzNefNW+y6HZnU55l7u?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 3fa07a43-4368-42d9-cd34-08d8cdb94e7d X-MS-Exchange-CrossTenant-AuthSource: MN2PR12MB3775.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Feb 2021 11:45:04.7343 (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: h5jITLQXRQoUFgKPXTk4sLLeYnae7LEv3fFZXuXBg3C65ctoq4DVASOEyY/glo/A X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR12MB4638 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Please try to add a "return NULL" at the beginning of ttm_pool_type_take(). That should effectively disable using the pool. Thanks for testing, Christian. Am 10.02.21 um 12:22 schrieb Mike Galbraith: > On Wed, 2021-02-10 at 11:52 +0100, Christian König wrote: >> >> You could try to replace the "for (order = min(MAX_ORDER - 1UL, >> __fls(num_pages)); num_pages;" in ttm_pool_alloc() with "for (order = 0; >> num_pages;" to get the old behavior. > That's a nogo too. > > -Mike >