From: David Hildenbrand <david@redhat.com>
To: Balbir Singh <balbirs@nvidia.com>,
dri-devel@lists.freedesktop.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Cc: "Andrew Morton" <akpm@linux-foundation.org>,
"Zi Yan" <ziy@nvidia.com>,
"Joshua Hahn" <joshua.hahnjy@gmail.com>,
"Rakie Kim" <rakie.kim@sk.com>,
"Byungchul Park" <byungchul@sk.com>,
"Gregory Price" <gourry@gourry.net>,
"Ying Huang" <ying.huang@linux.alibaba.com>,
"Alistair Popple" <apopple@nvidia.com>,
"Oscar Salvador" <osalvador@suse.de>,
"Lorenzo Stoakes" <lorenzo.stoakes@oracle.com>,
"Baolin Wang" <baolin.wang@linux.alibaba.com>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
"Nico Pache" <npache@redhat.com>,
"Ryan Roberts" <ryan.roberts@arm.com>,
"Dev Jain" <dev.jain@arm.com>, "Barry Song" <baohua@kernel.org>,
"Lyude Paul" <lyude@redhat.com>,
"Danilo Krummrich" <dakr@kernel.org>,
"David Airlie" <airlied@gmail.com>,
"Simona Vetter" <simona@ffwll.ch>,
"Ralph Campbell" <rcampbell@nvidia.com>,
"Mika Penttilä" <mpenttil@redhat.com>,
"Matthew Brost" <matthew.brost@intel.com>,
"Francois Dugast" <francois.dugast@intel.com>
Subject: Re: [v3 07/11] mm/thp: add split during migration support
Date: Wed, 27 Aug 2025 22:29:52 +0200 [thread overview]
Message-ID: <5cdd07b4-f924-4207-a8cf-09b4fc26d3d7@redhat.com> (raw)
In-Reply-To: <20250812024036.690064-8-balbirs@nvidia.com>
On 12.08.25 04:40, Balbir Singh wrote:
> Support splitting pages during THP zone device migration as needed.
> The common case that arises is that after setup, during migrate
> the destination might not be able to allocate MIGRATE_PFN_COMPOUND
> pages.
>
> Add a new routine migrate_vma_split_pages() to support the splitting
> of already isolated pages. The pages being migrated are already unmapped
> and marked for migration during setup (via unmap). folio_split() and
> __split_unmapped_folio() take additional isolated arguments, to avoid
> unmapping and remaping these pages and unlocking/putting the folio.
No detailed review, just a high-level comment: please take better care
of crafting your patch subjects.
This should probably be
mm/migrate_device: support splitting device folios during migration
--
Cheers
David / dhildenb
next prev parent reply other threads:[~2025-08-27 20:30 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-12 2:40 [v3 00/11] mm: support device-private THP Balbir Singh
2025-08-12 2:40 ` [v3 01/11] mm/zone_device: support large zone device private folios Balbir Singh
2025-08-26 14:22 ` David Hildenbrand
2025-08-12 2:40 ` [v3 02/11] mm/thp: zone_device awareness in THP handling code Balbir Singh
2025-08-12 14:47 ` kernel test robot
2025-08-26 15:19 ` David Hildenbrand
2025-08-27 10:14 ` Balbir Singh
2025-08-27 11:28 ` David Hildenbrand
2025-08-28 20:05 ` Matthew Brost
2025-08-28 20:12 ` David Hildenbrand
2025-08-28 20:17 ` Matthew Brost
2025-08-28 20:22 ` David Hildenbrand
2025-08-12 2:40 ` [v3 03/11] mm/migrate_device: THP migration of zone device pages Balbir Singh
2025-08-12 5:35 ` Mika Penttilä
2025-08-12 5:54 ` Matthew Brost
2025-08-12 6:18 ` Matthew Brost
2025-08-12 6:25 ` Mika Penttilä
2025-08-12 6:33 ` Matthew Brost
2025-08-12 6:37 ` Mika Penttilä
2025-08-12 23:36 ` Balbir Singh
2025-08-13 0:07 ` Mika Penttilä
2025-08-14 22:51 ` Balbir Singh
2025-08-15 0:04 ` Matthew Brost
2025-08-15 12:09 ` Balbir Singh
2025-08-21 10:24 ` Balbir Singh
2025-08-28 23:14 ` Matthew Brost
2025-08-12 2:40 ` [v3 04/11] mm/memory/fault: add support for zone device THP fault handling Balbir Singh
2025-08-12 2:40 ` [v3 05/11] lib/test_hmm: test cases and support for zone device private THP Balbir Singh
2025-08-12 2:40 ` [v3 06/11] mm/memremap: add folio_split support Balbir Singh
2025-08-12 2:40 ` [v3 07/11] mm/thp: add split during migration support Balbir Singh
2025-08-27 20:29 ` David Hildenbrand [this message]
2025-08-12 2:40 ` [v3 08/11] lib/test_hmm: add test case for split pages Balbir Singh
2025-08-12 2:40 ` [v3 09/11] selftests/mm/hmm-tests: new tests for zone device THP migration Balbir Singh
2025-08-12 2:40 ` [v3 10/11] gpu/drm/nouveau: add THP migration support Balbir Singh
2025-08-13 2:23 ` kernel test robot
2025-08-12 2:40 ` [v3 11/11] selftests/mm/hmm-tests: new throughput tests including THP Balbir Singh
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