From: Andrew Morton <akpm@linux-foundation.org>
To: Francois Dugast <francois.dugast@intel.com>
Cc: intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
"Matthew Brost" <matthew.brost@intel.com>,
"Zi Yan" <ziy@nvidia.com>, "Alistair Popple" <apopple@nvidia.com>,
"adhavan Srinivasan" <maddy@linux.ibm.com>,
"Nicholas Piggin" <npiggin@gmail.com>,
"Michael Ellerman" <mpe@ellerman.id.au>,
"Christophe Leroy (CS GROUP)" <chleroy@kernel.org>,
"Felix Kuehling" <Felix.Kuehling@amd.com>,
"Alex Deucher" <alexander.deucher@amd.com>,
"Christian König" <christian.koenig@amd.com>,
"David Airlie" <airlied@gmail.com>,
"Simona Vetter" <simona@ffwll.ch>,
"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
"Maxime Ripard" <mripard@kernel.org>,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"Lyude Paul" <lyude@redhat.com>,
"Danilo Krummrich" <dakr@kernel.org>,
"David Hildenbrand" <david@kernel.org>,
"Oscar Salvador" <osalvador@suse.de>,
"Jason Gunthorpe" <jgg@ziepe.ca>,
"Leon Romanovsky" <leon@kernel.org>,
"Lorenzo Stoakes" <lorenzo.stoakes@oracle.com>,
"Liam R . Howlett" <Liam.Howlett@oracle.com>,
"Vlastimil Babka" <vbabka@suse.cz>,
"Mike Rapoport" <rppt@kernel.org>,
"Suren Baghdasaryan" <surenb@google.com>,
"Michal Hocko" <mhocko@suse.com>,
"Balbir Singh" <balbirs@nvidia.com>,
linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org,
nouveau@lists.freedesktop.org, linux-mm@kvack.org,
linux-cxl@vger.kernel.org
Subject: Re: [PATCH v6 1/5] mm/zone_device: Reinitialize large zone device private folios
Date: Fri, 16 Jan 2026 14:34:32 -0800 [thread overview]
Message-ID: <20260116143432.50b98d6dc965b94f3b915333@linux-foundation.org> (raw)
In-Reply-To: <20260116111325.1736137-2-francois.dugast@intel.com>
On Fri, 16 Jan 2026 12:10:16 +0100 Francois Dugast <francois.dugast@intel.com> wrote:
> Reinitialize metadata for large zone device private folios in
> zone_device_page_init prior to creating a higher-order zone device
> private folio. 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.
>
> Without this fix, individual pages could have invalid pgmap fields and
> flags (with PG_locked being notably problematic) due to prior different
> order allocations, which can, and will, result in kernel crashes.
Is it OK to leave 6.18.x without this fixed?
next prev parent reply other threads:[~2026-01-16 22:34 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-16 11:10 [PATCH v6 0/5] Enable THP support in drm_pagemap Francois Dugast
2026-01-16 11:10 ` [PATCH v6 1/5] mm/zone_device: Reinitialize large zone device private folios Francois Dugast
2026-01-16 13:10 ` Balbir Singh
2026-01-16 16:07 ` Vlastimil Babka
2026-01-16 17:20 ` Jason Gunthorpe
2026-01-16 17:27 ` Vlastimil Babka
2026-01-22 8:02 ` Vlastimil Babka
2026-01-16 17:49 ` Jason Gunthorpe
2026-01-16 19:17 ` Vlastimil Babka
2026-01-16 20:31 ` Matthew Brost
2026-01-17 0:51 ` Jason Gunthorpe
2026-01-17 3:55 ` Matthew Brost
2026-01-17 4:42 ` Balbir Singh
2026-01-17 5:27 ` Matthew Brost
2026-01-19 5:59 ` Alistair Popple
2026-01-19 14:20 ` Jason Gunthorpe
2026-01-19 20:09 ` Zi Yan
2026-01-19 20:35 ` Jason Gunthorpe
2026-01-19 22:15 ` Balbir Singh
2026-01-20 2:50 ` Zi Yan
2026-01-20 13:53 ` Jason Gunthorpe
2026-01-21 3:01 ` Zi Yan
2026-01-22 7:19 ` Matthew Brost
2026-01-22 8:00 ` Vlastimil Babka
2026-01-22 9:10 ` Balbir Singh
2026-01-22 21:41 ` Andrew Morton
2026-01-22 22:53 ` Alistair Popple
2026-01-23 6:45 ` Vlastimil Babka
2026-01-22 14:29 ` Jason Gunthorpe
2026-01-22 15:46 ` Jason Gunthorpe
2026-01-23 2:41 ` Zi Yan
2026-01-23 14:19 ` Jason Gunthorpe
2026-01-21 3:51 ` Balbir Singh
2026-01-17 0:19 ` Jason Gunthorpe
2026-01-19 5:41 ` Alistair Popple
2026-01-19 14:24 ` Jason Gunthorpe
2026-01-16 22:34 ` Andrew Morton [this message]
2026-01-16 22:36 ` Matthew Brost
2026-01-16 11:10 ` [PATCH v6 2/5] drm/pagemap: Unlock and put folios when possible Francois Dugast
2026-01-16 11:10 ` [PATCH v6 3/5] drm/pagemap: Add helper to access zone_device_data Francois Dugast
2026-01-16 11:10 ` [PATCH v6 4/5] drm/pagemap: Correct cpages calculation for migrate_vma_setup Francois Dugast
2026-01-16 11:37 ` Balbir Singh
2026-01-16 12:02 ` Francois Dugast
2026-01-16 11:10 ` [PATCH v6 5/5] drm/pagemap: Enable THP support for GPU memory migration Francois Dugast
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