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/[email protected]
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 <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: Stefano Stabellini <[email protected]>
Cc: Oleksandr Tyshchenko <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Christian Brauner <[email protected]>
Cc: Lorenzo Stoakes <[email protected]>
Cc: "Liam R. Howlett" <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Zi Yan <[email protected]>
Cc: Baolin Wang <[email protected]>
Cc: Nico Pache <[email protected]>
Cc: Ryan Roberts <[email protected]>
Cc: Dev Jain <[email protected]>
Cc: Barry Song <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Pedro Falcato <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Oscar Salvador <[email protected]>
Cc: Lance Yang <[email protected]>
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
