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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
Download Patch File Download Diff File Expand all files Collapse all files

8
include/linux/hugetlb.h
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@@ -717,11 +717,11 @@ struct huge_bootmem_page {
};
int isolate_or_dissolve_huge_page(struct page *page, struct list_head *list);
struct page *alloc_huge_page(struct vm_area_struct *vma,
struct folio *alloc_hugetlb_folio(struct vm_area_struct *vma,
unsigned long addr, int avoid_reserve);
struct folio *alloc_hugetlb_folio_nodemask(struct hstate *h, int preferred_nid,
nodemask_t *nmask, gfp_t gfp_mask);
struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma,
struct folio *alloc_hugetlb_folio_vma(struct hstate *h, struct vm_area_struct *vma,
unsigned long address);
int hugetlb_add_to_page_cache(struct page *page, struct address_space *mapping,
pgoff_t idx);
@@ -1033,7 +1033,7 @@ static inline int isolate_or_dissolve_huge_page(struct page *page,
return -ENOMEM;
}
static inline struct page *alloc_huge_page(struct vm_area_struct *vma,
static inline struct folio *alloc_hugetlb_folio(struct vm_area_struct *vma,
unsigned long addr,
int avoid_reserve)
{
@@ -1047,7 +1047,7 @@ alloc_hugetlb_folio_nodemask(struct hstate *h, int preferred_nid,
return NULL;
}
static inline struct page *alloc_huge_page_vma(struct hstate *h,
static inline struct folio *alloc_hugetlb_folio_vma(struct hstate *h,
struct vm_area_struct *vma,
unsigned long address)
{