Based on mm/mm-new from today that contains [2]. 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. Cross-compiled for a variety of weird archs. [1] https://lkml.kernel.org/r/[email protected] [2] https://lkml.kernel.org/r/[email protected] v1 -> v2: * "mm/memory: convert print_bad_pte() to print_bad_page_map()" -> Don't use pgdp_get(), because it's broken on some arm configs -> Extend patch description -> Don't use pmd_val(pmdp_get()), because that doesn't work on some m68k configs * Added RBs 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: 760b462b3921c5dc8bfa151d2d27a944e4e96081 -- 2.50.1
