diff options
| -rw-r--r-- | mm/filemap.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 2a05b1fdd445..a52dd38d2b4a 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -3670,6 +3670,21 @@ static vm_fault_t filemap_map_folio_range(struct vm_fault *vmf, struct page *page = folio_page(folio, start); unsigned int count = 0; pte_t *old_ptep = vmf->pte; + unsigned long addr0; + + /* + * Map the large folio fully where possible. + * + * The folio must not cross VMA or page table boundary. + */ + addr0 = addr - start * PAGE_SIZE; + if (folio_within_vma(folio, vmf->vma) && + (addr0 & PMD_MASK) == ((addr0 + folio_size(folio) - 1) & PMD_MASK)) { + vmf->pte -= start; + page -= start; + addr = addr0; + nr_pages = folio_nr_pages(folio); + } do { if (PageHWPoison(page + count)) |