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 <a...@linux-foundation.org>
Cc: David Hildenbrand <da...@redhat.com>
Cc: Zi Yan <z...@nvidia.com>
Cc: Joshua Hahn <joshua.hah...@gmail.com>
Cc: Rakie Kim <rakie....@sk.com>
Cc: Byungchul Park <byungc...@sk.com>
Cc: Gregory Price <gou...@gourry.net>
Cc: Ying Huang <ying.hu...@linux.alibaba.com>
Cc: Alistair Popple <apop...@nvidia.com>
Cc: Oscar Salvador <osalva...@suse.de>
Cc: Lorenzo Stoakes <lorenzo.stoa...@oracle.com>
Cc: Baolin Wang <baolin.w...@linux.alibaba.com>
Cc: "Liam R. Howlett" <liam.howl...@oracle.com>
Cc: Nico Pache <npa...@redhat.com>
Cc: Ryan Roberts <ryan.robe...@arm.com>
Cc: Dev Jain <dev.j...@arm.com>
Cc: Barry Song <bao...@kernel.org>
Cc: Lyude Paul <ly...@redhat.com>
Cc: Danilo Krummrich <d...@kernel.org>
Cc: David Airlie <airl...@gmail.com>
Cc: Simona Vetter <sim...@ffwll.ch>
Cc: Ralph Campbell <rcampb...@nvidia.com>
Cc: Mika Penttilä <mpent...@redhat.com>
Cc: Matthew Brost <matthew.br...@intel.com>
Cc: Francois Dugast <francois.dug...@intel.com>
Signed-off-by: Balbir Singh <balb...@nvidia.com>
---
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.
--
Cheers
David / dhildenb
