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Fri, 27 Feb 2026 21:11:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772226668; bh=WV5uc/frrKbTpgSuTfIL/Q0arkypj/EMXIYECsp3ih4=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=ly9MG+Tyt+/Kbi+lbUoiqKMMboC21eSgm1KPIa1Cg8Xq2DOehnJ+nV4MS1RowzHSm YjS5KSKgz92mjrAKLYOUJdfW7InnjFFpOhR2dnGMbUSL1Egom1QteTcJEAx7Kyv+5Q DbpkumyUx84Y1vU+p6dubEccdW3OPKw1G1K3CiYkyXlD4tJKDkJlNtLPimlje3oy03 eVy4LUulNEpmOVzf6SorSevqzbaq0W3xBn4Lpuj65VMtlHpfWOxWWe8k3OYhgt3vk/ +jMNptxNuMs+t+8bLHIvkFgi7XsqpybbVd0LaxrvgZ2GdI37uijQQas7xVewjKZgj3 T3dIpAsoyNDEA== Message-ID: <9ee22635-a219-47bb-a397-bc4e141b408d@kernel.org> Date: Fri, 27 Feb 2026 22:11:00 +0100 X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 01/13] mm/migrate_device: Introduce migrate_pfn_from_page() helper To: Jordan Niethe , linux-mm@kvack.org Cc: balbirs@nvidia.com, matthew.brost@intel.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, ziy@nvidia.com, apopple@nvidia.com, lorenzo.stoakes@oracle.com, lyude@redhat.com, dakr@kernel.org, airlied@gmail.com, simona@ffwll.ch, rcampbell@nvidia.com, mpenttil@redhat.com, jgg@nvidia.com, willy@infradead.org, linuxppc-dev@lists.ozlabs.org, intel-xe@lists.freedesktop.org, jgg@ziepe.ca, Felix.Kuehling@amd.com, jhubbard@nvidia.com, maddy@linux.ibm.com, mpe@ellerman.id.au, ying.huang@linux.alibaba.com References: <20260202113642.59295-1-jniethe@nvidia.com> <20260202113642.59295-2-jniethe@nvidia.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 2/2/26 12:36, Jordan Niethe wrote: > To create a migrate entry from a given struct page, that page is first > converted to its pfn, before passing the pfn to migrate_pfn(). > > A future change will remove device private pages from the physical > address space. This will mean that device private pages no longer have a > pfn and must be handled separately. > > Prepare for this with a new helper: > > - migrate_pfn_from_page() > > This helper takes a struct page as parameter instead of a pfn. This will > allow more flexibility for handling the mpfn differently for device > private pages. > > Reviewed-by: Balbir Singh > Acked-by: Felix Kuehling > Signed-off-by: Jordan Niethe > --- Acked-by: David Hildenbrand (Arm) -- Cheers, David