From: Balbir Singh <balbirs@nvidia.com>
To: mpenttil@redhat.com, linux-mm@kvack.org
Cc: dri-devel@lists.freedesktop.org, intel-xe@lists.freedesktop.org,
linux-kernel@vger.kernel.org,
David Hildenbrand <david@kernel.org>,
Jason Gunthorpe <jgg@nvidia.com>,
Leon Romanovsky <leonro@nvidia.com>,
Alistair Popple <apopple@nvidia.com>, Zi Yan <ziy@nvidia.com>,
Matthew Brost <matthew.brost@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Lorenzo Stoakes <ljs@kernel.org>,
"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>
Subject: Re: [PATCH v14 01/12] mm/Kconfig: changes for migrate on fault for device pages
Date: Wed, 23 Sep 2026 08:27:25 +1000 [thread overview]
Message-ID: <c2b28c18-3717-43d1-acba-05eaf9b1b9cf@nvidia.com> (raw)
In-Reply-To: <20260922053421.4092027-2-mpenttil@redhat.com>
On 9/22/26 3:34 PM, mpenttil@redhat.com wrote:
> From: Mika Penttilä <mpenttil@redhat.com>
>
> HMM depends on MMU notifiers. With the unified HMM/migrate_device
> page table walk migrate_device needs HMM enabled.
> Enable them explicitly to avoid breaking random configs.
>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: David Hildenbrand <david@kernel.org>
> Cc: Lorenzo Stoakes <ljs@kernel.org>
> Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
> Cc: Vlastimil Babka <vbabka@suse.cz>
> Cc: Mike Rapoport <rppt@kernel.org>
> Cc: Suren Baghdasaryan <surenb@google.com>
> Cc: Michal Hocko <mhocko@suse.com>
> Signed-off-by: Mika Penttilä <mpenttil@redhat.com>
> Acked-by: David Hildenbrand (Arm) <david@kernel.org>
> ---
> mm/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/mm/Kconfig b/mm/Kconfig
> index 604c58199acb..b7a485beb9a7 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -687,6 +687,7 @@ config MIGRATION
>
> config DEVICE_MIGRATION
> def_bool MIGRATION && ZONE_DEVICE
> + select HMM_MIRROR
>
> config ARCH_ENABLE_HUGEPAGE_MIGRATION
> bool
Acked-by: Balbir Singh <balbirs@nvidia.com>
next prev parent reply other threads:[~2026-09-22 22:27 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-22 5:34 [PATCH 00/12] [PATCH v14 00/12] " mpenttil
2026-09-22 5:34 ` [PATCH v14 01/12] mm/Kconfig: changes for " mpenttil
2026-09-22 22:27 ` Balbir Singh [this message]
2026-09-23 5:42 ` Mika Penttilä
2026-09-22 5:34 ` [PATCH v14 02/12] mm: add helper to convert HMM pfn to migrate pfn mpenttil
2026-09-22 5:34 ` [PATCH v14 03/12] mm/hmm: preparations for HMM to participate in migration mpenttil
2026-09-22 5:34 ` [PATCH v14 04/12] mm/hmm: do the plumbing " mpenttil
2026-09-22 5:34 ` [PATCH v14 05/12] mm/hmm: implement folio split for migrate needs in HMM pagewalk mpenttil
2026-09-22 5:34 ` [PATCH v14 06/12] mm/hmm: migrate collection in HMM pagewalk - pte level mpenttil
2026-09-22 5:34 ` [PATCH v14 07/12] mm/hmm: migrate collection in HMM pagewalk - pmd level mpenttil
2026-09-22 5:34 ` [PATCH v14 08/12] mm/hmm: add lazy MMU mode support for migration in HMM pagewalk mpenttil
2026-09-22 5:34 ` [PATCH v14 09/12] mm/hmm: implement rollback for device page " mpenttil
2026-09-22 5:34 ` [PATCH v14 10/12] mm: enable device page migration from " mpenttil
2026-09-22 5:34 ` [PATCH v14 11/12] lib/test_hmm: add a new testcase for the migrate on fault mpenttil
2026-09-22 5:34 ` [PATCH v14 12/12] Documentation/mm/hmm: document migration through hmm_range_fault() mpenttil
2026-09-23 2:27 ` [PATCH 00/12] [PATCH v14 00/12] migrate on fault for device pages Andrew Morton
2026-09-23 5:29 ` Mika Penttilä
2026-09-23 21:19 ` Andrew Morton
2026-09-23 23:24 ` Jason Gunthorpe
2026-09-24 0:14 ` Mika Penttilä
2026-09-24 0:10 ` Mika Penttilä
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