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mm/hugetlb: convert hugetlb fault paths to use alloc_hugetlb_folio()

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Change alloc_huge_page() to alloc_hugetlb_folio() by changing all callers
to handle the now folio return type of the function.  In this conversion,
alloc_huge_page_vma() is also changed to alloc_hugetlb_folio_vma() and
hugepage_add_new_anon_rmap() is changed to take in a folio directly.  Many
additions of '&folio->page' are cleaned up in subsequent patches.

hugetlbfs_fallocate() is also refactored to use the RCU +
page_cache_next_miss() API.

Link: https://lkml.kernel.org/r/20230125170537.96973-5-sidhartha.kumar@oracle.com
Suggested-by: Mike Kravetz <mike.kravetz@oracle.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Sidhartha Kumar
2023-01-25 09:05:33 -08:00
committed by Andrew Morton
parent ea8e72f411
commit d0ce0e47b3
6 changed files with 133 additions and 130 deletions
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6
mm/rmap.c
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@@ -2534,15 +2534,13 @@ void hugepage_add_anon_rmap(struct page *page, struct vm_area_struct *vma,
!!(flags & RMAP_EXCLUSIVE));
}
void hugepage_add_new_anon_rmap(struct page *page,
void hugepage_add_new_anon_rmap(struct folio *folio,
struct vm_area_struct *vma, unsigned long address)
{
struct folio *folio = page_folio(page);
BUG_ON(address < vma->vm_start || address >= vma->vm_end);
/* increment count (starts at -1) */
atomic_set(&folio->_entire_mapcount, 0);
folio_clear_hugetlb_restore_reserve(folio);
__page_set_anon_rmap(folio, page, vma, address, 1);
__page_set_anon_rmap(folio, &folio->page, vma, address, 1);
}
#endif /* CONFIG_HUGETLB_PAGE */