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WrT32uK1lH7HPzno2iqLTMR/muwYX27bNPY+Pn1BzhYaQPKhKPOL2iYleBaCsRC6 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: On 9/11/25 22:52, David Hildenbrand wrote: > On 11.09.25 14:49, Balbir Singh wrote: >> On 9/11/25 21:45, David Hildenbrand wrote: >>> On 08.09.25 02:04, Balbir Singh wrote: >>>> Add routines to support allocation of large order zone device folios >>>> and helper functions for zone device folios, to check if a folio is >>>> device private and helpers for setting zone device data. >>>> >>>> When large folios are used, the existing page_free() callback in >>>> pgmap is called when the folio is freed, this is true for both >>>> PAGE_SIZE and higher order pages. >>>> >>>> Zone device private large folios do not support deferred split and >>>> scan like normal THP folios. >>>> >>>> Cc: Andrew Morton >>>> Cc: David Hildenbrand >>>> Cc: Zi Yan >>>> Cc: Joshua Hahn >>>> Cc: Rakie Kim >>>> Cc: Byungchul Park >>>> Cc: Gregory Price >>>> Cc: Ying Huang >>>> Cc: Alistair Popple >>>> Cc: Oscar Salvador >>>> Cc: Lorenzo Stoakes >>>> Cc: Baolin Wang >>>> Cc: "Liam R. Howlett" >>>> Cc: Nico Pache >>>> Cc: Ryan Roberts >>>> Cc: Dev Jain >>>> Cc: Barry Song >>>> Cc: Lyude Paul >>>> Cc: Danilo Krummrich >>>> Cc: David Airlie >>>> Cc: Simona Vetter >>>> Cc: Ralph Campbell >>>> Cc: Mika Penttilä >>>> Cc: Matthew Brost >>>> Cc: Francois Dugast >>>> >>>> Signed-off-by: Balbir Singh >>>> --- >>> >>> You missed my comments of this patch in v3. >>> >> >> Hi, David >> >> Looks I missed your comments, just checked those were largely about alignment and >> integrating the code for DEVICE_COHERENT and DEVICE_PRIVATE cases into similar looking >> bits for zone device folio free and code-alignment. I'll take a look and update as needed. > > Yes, and the confusing folio->mapping = NULL that I cannot connect to THP support. > I can remove that, let me reunify those bits, seems relatively straight forward Balbir