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Fri, 6 Mar 2026 16:05:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772813117; bh=TLRROmrsKI9S3nwfOkVUtHkXt6pvD2xr1+JIGTbR0qA=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=bJoQ2bvjxsIEpf4N/uM2reVOaClEKLQf6PDTK2nLQDlmHRDqimLETOChu2W31xBbx GApqfvO2XPzidk7ZfppUfpORlqHcBvATNMnUYvsWDEPeAaeHxvKXqkYZTfR3k5yeLV zWUyMmSUwhpmjnQ8kW/Sdn7ZqnlkpDshjThoMSCEACc/h94tOlJIbMhq04/eaFB5rw nI3nXE7f0kfL2b2g5O5GI1Lzm4pKmjuWPxFlcfajMe53Jpu1z4/MeEjmOe+l5ueo+N OqvnE/xehbo+kLBhr6Ea0wtvdH/0xTc2N7yWfvFqIgOMZ1KWqk5Y/68aNM9DykCBTV WsANCqZvIUYcg== Message-ID: Date: Fri, 6 Mar 2026 17:05:06 +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 12/13] mm/hmm: Add flag to track device private pages 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> <20260202113642.59295-13-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: > A future change will remove device private pages from the physical > address space. This will mean that device private pages no longer have > normal pfns and must be handled separately. > > Prepare for this by adding a HMM_PFN_DEVICE_PRIVATE flag to indicate > that a hmm_pfn contains a PFN for a device private page. > > Signed-off-by: Jordan Niethe > Signed-off-by: Alistair Popple That makes sense to me. -- Cheers, David