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Thu, 15 Jan 2026 03:07:41 +0000 Date: Wed, 14 Jan 2026 19:07:37 -0800 From: Matthew Brost To: Andrew Morton CC: Francois Dugast , , , Zi Yan , Alistair Popple , adhavan Srinivasan , Nicholas Piggin , Michael Ellerman , "Christophe Leroy (CS GROUP)" , Felix Kuehling , Alex Deucher , Christian =?iso-8859-1?Q?K=F6nig?= , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Lyude Paul , Danilo Krummrich , "David Hildenbrand" , Oscar Salvador , "Jason Gunthorpe" , Leon Romanovsky , Lorenzo Stoakes , "Liam R . Howlett" , Vlastimil Babka , Mike Rapoport , "Suren Baghdasaryan" , Michal Hocko , "Balbir Singh" , , , , , , , Subject: Re: [PATCH v5 1/5] mm/zone_device: Reinitialize large zone device private folios Message-ID: References: <20260114192111.1267147-1-francois.dugast@intel.com> <20260114192111.1267147-2-francois.dugast@intel.com> <20260114190154.c05e460ebf4054828430633f@linux-foundation.org> Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260114190154.c05e460ebf4054828430633f@linux-foundation.org> X-ClientProxiedBy: BY3PR05CA0004.namprd05.prod.outlook.com (2603:10b6:a03:254::9) To PH7PR11MB6522.namprd11.prod.outlook.com (2603:10b6:510:212::12) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH7PR11MB6522:EE_|SJ5PPFE5BD61D44:EE_ X-MS-Office365-Filtering-Correlation-Id: 16acbd5c-edbf-4142-a4ee-08de53e33f10 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|1800799024|366016; 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This step is necessary when the folio’s order changes > > dynamically between zone_device_page_init calls to avoid building a > > corrupt folio. As part of the metadata reinitialization, the dev_pagemap > > must be passed in from the caller because the pgmap stored in the folio > > page may have been overwritten with a compound head. > > > > --- a/drivers/gpu/drm/drm_pagemap.c > > +++ b/drivers/gpu/drm/drm_pagemap.c > > @@ -201,7 +201,7 @@ static void drm_pagemap_get_devmem_page(struct page *page, > > struct drm_pagemap_zdd *zdd) > > { > > page->zone_device_data = drm_pagemap_zdd_get(zdd); > > - zone_device_page_init(page, 0); > > + zone_device_page_init(page, zdd->dpagemap->pagemap, 0); > > } > > drivers/gpu/drm/drm_pagemap.c:200:40: error: 'struct drm_pagemap_zdd' has no member named 'dpagemap' > > I guess this was accidentally fixed in a later patch? > Ah, no. This is because we merged some in drm-tip which is not 6.19, this is based on the drm-tip branch. > Please let's decide whether to fast-track the [1/N] fix into mainline > and if so, prepare something which compiles! Maybe we just take this through the MM repo then? I suppose I should send out patch which applies to the MM repo? I just cloned that repo. Matt