This is the follow-up of [1]:
[PATCH RFC 00/14] mm: vm_normal_page*() + CoW PFNMAP improvements
Based on mm/mm-new. I dropped the CoW PFNMAP changes for now, still
working on a better way to sort all that out cleanly.
Cleanup and unify vm_normal_page_*() handling, also marking the
huge zerofolio as special in the PMD. Add+use vm_normal_page_pud() and
cleanup that XEN vm_ops->find_special_page thingy.
There are plans of using vm_normal_page_*() more widely soon.
Briefly tested on UML (making sure vm_normal_page() still works as expected
without pte_special() support) and on x86-64 with a bunch of tests.
[1] https://lkml.kernel.org/r/20250617154345.2494405-1-da...@redhat.com
RFC -> v1:
* Dropped the highest_memmap_pfn removal stuff and instead added
"mm/memory: convert print_bad_pte() to print_bad_page_map()"
* Dropped "mm: compare pfns only if the entry is present when inserting
pfns/pages" for now, will probably clean that up separately.
* Dropped "mm: remove "horrible special case to handle copy-on-write
behaviour"", and "mm: drop addr parameter from vm_normal_*_pmd()" will
require more thought
* "mm/huge_memory: support huge zero folio in vmf_insert_folio_pmd()"
-> Extend patch description.
* "fs/dax: use vmf_insert_folio_pmd() to insert the huge zero folio"
-> Extend patch description.
* "mm/huge_memory: mark PMD mappings of the huge zero folio special"
-> Remove comment from vm_normal_page_pmd().
* "mm/memory: factor out common code from vm_normal_page_*()"
-> Adjust to print_bad_page_map()/highest_memmap_pfn changes.
-> Add proper kernel doc to all involved functions
* "mm: introduce and use vm_normal_page_pud()"
-> Adjust to print_bad_page_map() changes.
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Juergen Gross <jgr...@suse.com>
Cc: Stefano Stabellini <sstabell...@kernel.org>
Cc: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com>
Cc: Dan Williams <dan.j.willi...@intel.com>
Cc: Matthew Wilcox <wi...@infradead.org>
Cc: Jan Kara <j...@suse.cz>
Cc: Alexander Viro <v...@zeniv.linux.org.uk>
Cc: Christian Brauner <brau...@kernel.org>
Cc: Lorenzo Stoakes <lorenzo.stoa...@oracle.com>
Cc: "Liam R. Howlett" <liam.howl...@oracle.com>
Cc: Vlastimil Babka <vba...@suse.cz>
Cc: Mike Rapoport <r...@kernel.org>
Cc: Suren Baghdasaryan <sur...@google.com>
Cc: Michal Hocko <mho...@suse.com>
Cc: Zi Yan <z...@nvidia.com>
Cc: Baolin Wang <baolin.w...@linux.alibaba.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: Jann Horn <ja...@google.com>
Cc: Pedro Falcato <pfalc...@suse.de>
Cc: Hugh Dickins <hu...@google.com>
Cc: Oscar Salvador <osalva...@suse.de>
Cc: Lance Yang <lance.y...@linux.dev>
David Hildenbrand (9):
mm/huge_memory: move more common code into insert_pmd()
mm/huge_memory: move more common code into insert_pud()
mm/huge_memory: support huge zero folio in vmf_insert_folio_pmd()
fs/dax: use vmf_insert_folio_pmd() to insert the huge zero folio
mm/huge_memory: mark PMD mappings of the huge zero folio special
mm/memory: convert print_bad_pte() to print_bad_page_map()
mm/memory: factor out common code from vm_normal_page_*()
mm: introduce and use vm_normal_page_pud()
mm: rename vm_ops->find_special_page() to vm_ops->find_normal_page()
drivers/xen/Kconfig | 1 +
drivers/xen/gntdev.c | 5 +-
fs/dax.c | 47 +----
include/linux/mm.h | 20 +-
mm/Kconfig | 2 +
mm/huge_memory.c | 119 ++++-------
mm/memory.c | 346 ++++++++++++++++++++++---------
mm/pagewalk.c | 20 +-
tools/testing/vma/vma_internal.h | 18 +-
9 files changed, 343 insertions(+), 235 deletions(-)
base-commit: 64d19a2cdb7b62bcea83d9309d83e06d7aff4722
--
2.50.1
