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b=pADlDw8M4pf14jpmlIFbIscbYzigwt0Z6gyiUPqPYg4K53sg4tuJNS+Fd8+FfzpvP C4XWlPplSyj14cXa9UOyziF1zOax7eidmDcttDSh0mjeh/D67t8YdTHpquiybuI+/P Q4NABcm2YikcvBj0ZVFXg/MYMud+oq8IN8rNdASMAhRBY4xV+KoolGf9pk+V097FMg EzBd1mN7Vu1V6bMDFMIYJvXLnz1586zJu9OcgL9MTm+6kLK7kQUrdnyfLgd8ZL3Otd XR/MPyTP6VxLKOchVZSl3jixlqmRd+7Uiwdp721hNeoHeewXT7Xoj99I5dJSjBTylf cH5uYZEzgAv6w== Message-ID: <75a6bc37-e597-46f0-adf8-c8ec8e5e0e4e@kernel.org> Date: Fri, 6 Feb 2026 14:06:55 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 00/13] Remove device private pages from physical address space 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 References: <20260130111050.53670-1-jniethe@nvidia.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam11 X-Stat-Signature: painur44obhr3s4w7nstbg3qoxu1h667 X-Rspam-User: X-Rspamd-Queue-Id: C10851C0010 X-HE-Tag: 1770383223-512005 X-HE-Meta: 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 SbGDCvob iJ2UdQrweQwwAqVeqg1MFluERQRTlnrDBNK9O46ZoHjf7DBf0A04Fe/YJVZd/Y6Noo6mPDPC+7YtCgZ8Ci0pq5NSP6KO17AqBmM7+1DjlsjAkavbVFh/U6VdN4hSnjf9zttxxIMxTYJytXPOFy8FaGJSpnmXGKRQX8S/gTpAcnflgSadNxbB3GMLHqS4PUZ8Fpxh7NuXFV3KJ1PR3iiHq2aIz92AwK7/P2vPjGvwbnP4MyhpPRbT6WiEtcK3LAmEOlAy2 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > The last patch contains the bulk of the work where we change how we > convert between device private pages to device private offsets and then > use a new interface for allocating device private pages without the need > for reserving physical address space. > > By removing the device private pages from the physical address space, > this series also opens up the possibility to moving away from tracking > device private memory using struct pages in the future. This is > desirable as on systems with large amounts of memory these device > private struct pages use a signifiant amount of memory and take a > significant amount of time to initialize. I plan to take a look at some things in here soon; still catching up on my overflowing inbox. -- Cheers, David