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b=tfpZE6eYCOoa555WSgFCjpII32tak+LzoaEaRxP4ye4qZX7LgRj15vNiOZ2695llU MNfVHEWhiFY6NnFFa8g8nQJfBRxUAO+Hn0nxWPWPY5B4fUrvx7ZZuLyM4/WOD1ugyw AzwkrXl7H4ko0dH7qaCv8zpEE0bn6HMAqhQ5z3pD9gHVG7WyGmnci/dDwWGWDIGX7/ xf4ifUyl42MHwVWOLr+va8tvt1bsRStWXPNtn6qLNu81pF0Weni7PEtzVKdWzsRwBB mUwDRC9H1eIQfQERPDEtttridHp8UyyA6p0liXVgbGLYBVU2fM9ptlFEUo4w0D4V8y 2H7OVgjzqkAHw== Message-ID: <1abedb3a-f162-42b8-91d4-7d1b3df43fff@kernel.org> Date: Fri, 8 May 2026 22:57:15 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3] dma-contiguous: setup default numa cma area if not configured explicitly To: Robin Murphy , Feng Tang Cc: Marek Szyprowski , Ying Huang , Andrew Morton , Lorenzo Stoakes , Liam.Howlett@oracle.com, Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , linux-mm@kvack.org, Christoph Hellwig , Catalin Marinas , Will Deacon , iommu@lists.linux.dev, linux-kernel@vger.kernel.org, Changrong Chen References: <20260428060550.7167-1-feng.tang@linux.alibaba.com> <6dd52f8b-7092-4d02-ba24-f8b55409b7b6@kernel.org> <59d05fdb-bb61-4d92-8df3-45aa3f9f7bee@arm.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 X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: DD3D31C0004 X-Stat-Signature: f7pyn7btkz4uj7ds43iycijs4iebin5i X-Rspam-User: X-HE-Tag: 1778273844-878158 X-HE-Meta: U2FsdGVkX1+trjBn4bJt5fzU7Iupub3yeAeos6uTDysFu/z7XBsOfmsp3lnJX486+Vla03KdMFnij3yHnNLnDO5HK2Yw+wiYE/RmcYllypbdHc1MCwOWHdq2kzrZkrt+e9QvWzBNXjcRFK/hBZPF+znnNnqXpDAn7+Pif5Wt4a+joR0mgxG4cqY0IbnjMmxl4QRGuG+iqeaMhacDDKawrBLWeIktL+Ex7Fqfdw2s+yAfVgERJIT4wCa80oGn/m4oCL0b6HLsdORdH4i4Uj1OwKl4EJj/u/wwtOmvxWa7+gC5TPMr5g1VGHhRZ7Ecdj1SXiJqSS2NjhG4JiEO+hkjHZP2p6oTupL3A57/Z9wjLgNtEnepTFGXWSPRQEekofokuARXIKiV5ZlBs+r/D7y3EAZ5dGSYzfwA1i+rxKP3n8CbPB6pZrscXLcO0l8whsxBkCWUvd5eKK5b38J2yfYIlXMR+0zHomJGxvKTX5C1SKzoOtWuV7fzzvYeH2aGq33YHVDpC7bmwWCxjgP9CGPKBKZJiiJRgQioJybRtdGx7RbnVJsjvtPDXSVREQvodcrnbu3YbPy9a6dZKbz4rsQVm+PvFVChFGf14vdA29fQbZILcTB8E32mPNBzTK+DpSMOzLEC139e1V+JBXhuXMqwvk7tqcfu1HZ703CaAJ3iyoLYBfSxG9qPmk+kb92dhh7hYXG7UnPURqA29+T62HE1P6+tJLu9N0xCCGtPwNCzdgC6IgdEWQwe1oRoyB4P0Ci2jVj4rbDB9W9PHRnOAjdLgKj1UHZ4h2gQHRQUna+GszHtz9xdAirKZKTYjqNgImeGFeCcZEWRahnOIEXWF8by6CgtLOrKaWqd+5rrU9/TIrI9gTYUrZUmUJZX9nVGwTPv4Mh3BLU2uT13f8hUYPPbP5IanblSgla3oAnp/K5nkx+0jqQlUsxZVuR5/7JwwECKvDtM+KFOCLDirCf8bQZ VbQT4ynp 65iIMWZRdUJvty9+pA3o4OwSzYR4tLsBJM8CNFNBVGIavNts2WftUae8wqpp3dNBZGvCvtARlaXgOAjE1a72CwqafrQ2vdc9fdW3xx1GDeSlgJmL/A4n9NxKE7NV7Fm3fDxve7R0ys9ccYVl2Erw9kkuv3PzlLSupHRXwOhK/kwiu4XcljV1O09SmdFAM+w/egzgfUHBkYJectRu8AzuARp4aVy1ttpvAhPSj+CuBSb4py0deisgB8P6u9Z/OHrAGsE0G Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 5/8/26 14:58, Robin Murphy wrote: > On 2026-05-08 12:46 pm, David Hildenbrand (Arm) wrote: >> On 5/6/26 17:46, Feng Tang wrote: >>> >>> Yes, it is confusing. >>> >>> >>> Maybe a CMA_NUMA_SIZE_MBYTES? >> >> Maybe, I'm hoping some CMA DMA people have the capacity to provide input. > > But really that _is_ pretty much the idea here Cool, I guess that's the right direction then, thanks. -- Cheers, David