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mm/hugetlb: convert restore_reserve_on_error to take in a folio

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Every caller of restore_reserve_on_error() is now passing in &folio->page,
change the function to take in a folio directly and clean up the call
sites.

Link: https://lkml.kernel.org/r/20230125170537.96973-6-sidhartha.kumar@oracle.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: Mike Kravetz <mike.kravetz@oracle.com>
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 09:05:34 -08:00 committed by Andrew Morton
parent d0ce0e47b3
commit d2d7bb44bf
3 changed files with 12 additions and 13 deletions
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2
fs/hugetlbfs/inode.c
View file

@ -873,7 +873,7 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset,
__folio_mark_uptodate(folio);
error = hugetlb_add_to_page_cache(&folio->page, mapping, index);
if (unlikely(error)) {
restore_reserve_on_error(h, &pseudo_vma, addr, &folio->page);
restore_reserve_on_error(h, &pseudo_vma, addr, folio);
folio_put(folio);
mutex_unlock(&hugetlb_fault_mutex_table[hash]);
goto out;

2
include/linux/hugetlb.h
View file

@ -726,7 +726,7 @@ struct folio *alloc_hugetlb_folio_vma(struct hstate *h, struct vm_area_struct *v
int hugetlb_add_to_page_cache(struct page *page, struct address_space *mapping,
pgoff_t idx);
void restore_reserve_on_error(struct hstate *h, struct vm_area_struct *vma,
unsigned long address, struct page *page);
unsigned long address, struct folio *folio);
/* arch callback */
int __init __alloc_bootmem_huge_page(struct hstate *h, int nid);

21
mm/hugetlb.c
View file

@ -2802,9 +2802,9 @@ static long vma_del_reservation(struct hstate *h,
* and the hugetlb mutex should remain held when calling this routine.
*
* It handles two specific cases:
* 1) A reservation was in place and the page consumed the reservation.
* HPageRestoreReserve is set in the page.
* 2) No reservation was in place for the page, so HPageRestoreReserve is
* 1) A reservation was in place and the folio consumed the reservation.
* hugetlb_restore_reserve is set in the folio.
* 2) No reservation was in place for the page, so hugetlb_restore_reserve is
* not set. However, alloc_hugetlb_folio always updates the reserve map.
*
* In case 1, free_huge_page later in the error path will increment the
@ -2817,9 +2817,8 @@ static long vma_del_reservation(struct hstate *h,
* In case 2, simply undo reserve map modifications done by alloc_hugetlb_folio.
*/
void restore_reserve_on_error(struct hstate *h, struct vm_area_struct *vma,
unsigned long address, struct page *page)
unsigned long address, struct folio *folio)
{
struct folio *folio = page_folio(page);
long rc = vma_needs_reservation(h, vma, address);
if (folio_test_hugetlb_restore_reserve(folio)) {
@ -5102,7 +5101,7 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src,
entry = huge_ptep_get(src_pte);
if (!pte_same(src_pte_old, entry)) {
restore_reserve_on_error(h, dst_vma, addr,
&new_folio->page);
new_folio);
folio_put(new_folio);
/* huge_ptep of dst_pte won't change as in child */
goto again;
@ -5634,7 +5633,7 @@ static vm_fault_t hugetlb_wp(struct mm_struct *mm, struct vm_area_struct *vma,
* unshare)
*/
if (new_folio != page_folio(old_page))
restore_reserve_on_error(h, vma, haddr, &new_folio->page);
restore_reserve_on_error(h, vma, haddr, new_folio);
folio_put(new_folio);
out_release_old:
put_page(old_page);
@ -5846,7 +5845,7 @@ static vm_fault_t hugetlb_no_page(struct mm_struct *mm,
* to the page cache. So it's safe to call
* restore_reserve_on_error() here.
*/
restore_reserve_on_error(h, vma, haddr, &folio->page);
restore_reserve_on_error(h, vma, haddr, folio);
folio_put(folio);
goto out;
}
@ -5947,7 +5946,7 @@ static vm_fault_t hugetlb_no_page(struct mm_struct *mm,
spin_unlock(ptl);
backout_unlocked:
if (new_folio && !new_pagecache_folio)
restore_reserve_on_error(h, vma, haddr, &folio->page);
restore_reserve_on_error(h, vma, haddr, folio);
folio_unlock(folio);
folio_put(folio);
@ -6210,7 +6209,7 @@ int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm,
/* Free the allocated folio which may have
* consumed a reservation.
*/
restore_reserve_on_error(h, dst_vma, dst_addr, &folio->page);
restore_reserve_on_error(h, dst_vma, dst_addr, folio);
folio_put(folio);
/* Allocate a temporary folio to hold the copied
@ -6339,7 +6338,7 @@ int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm,
folio_unlock(folio);
out_release_nounlock:
if (!folio_in_pagecache)
restore_reserve_on_error(h, dst_vma, dst_addr, &folio->page);
restore_reserve_on_error(h, dst_vma, dst_addr, folio);
folio_put(folio);
goto out;
}