The patch titled
Subject: mm/hugetlb: convert restore_reserve_on_error() to folios
has been added to the -mm mm-unstable branch. Its filename is
mm-hugetlb-convert-restore_reserve_on_error-to-folios.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-hugetlb-convert-restore_reserve_on_error-to-folios.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Subject: mm/hugetlb: convert restore_reserve_on_error() to folios
Date: Fri, 13 Jan 2023 16:30:56 -0600
Use the hugetlb folio flag macros inside restore_reserve_on_error() and
update the comments to reflect the use of folios.
Link: https://lkml.kernel.org/r/20230113223057.173292-8-sidhartha.kumar@xxxxxxxxxx
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Reviewed-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/hugetlb.c~mm-hugetlb-convert-restore_reserve_on_error-to-folios
+++ a/mm/hugetlb.c
@@ -2819,22 +2819,23 @@ static long vma_del_reservation(struct h
void restore_reserve_on_error(struct hstate *h, struct vm_area_struct *vma,
unsigned long address, struct page *page)
{
+ struct folio *folio = page_folio(page);
long rc = vma_needs_reservation(h, vma, address);
- if (HPageRestoreReserve(page)) {
+ if (folio_test_hugetlb_restore_reserve(folio)) {
if (unlikely(rc < 0))
/*
* Rare out of memory condition in reserve map
- * manipulation. Clear HPageRestoreReserve so that
- * global reserve count will not be incremented
+ * manipulation. Clear hugetlb_restore_reserve so
+ * that global reserve count will not be incremented
* by free_huge_page. This will make it appear
- * as though the reservation for this page was
+ * as though the reservation for this folio was
* consumed. This may prevent the task from
- * faulting in the page at a later time. This
+ * faulting in the folio at a later time. This
* is better than inconsistent global huge page
* accounting of reserve counts.
*/
- ClearHPageRestoreReserve(page);
+ folio_clear_hugetlb_restore_reserve(folio);
else if (rc)
(void)vma_add_reservation(h, vma, address);
else
@@ -2845,7 +2846,7 @@ void restore_reserve_on_error(struct hst
* This indicates there is an entry in the reserve map
* not added by alloc_huge_page. We know it was added
* before the alloc_huge_page call, otherwise
- * HPageRestoreReserve would be set on the page.
+ * hugetlb_restore_reserve would be set on the folio.
* Remove the entry so that a subsequent allocation
* does not consume a reservation.
*/
@@ -2854,12 +2855,12 @@ void restore_reserve_on_error(struct hst
/*
* VERY rare out of memory condition. Since
* we can not delete the entry, set
- * HPageRestoreReserve so that the reserve
- * count will be incremented when the page
+ * hugetlb_restore_reserve so that the reserve
+ * count will be incremented when the folio
* is freed. This reserve will be consumed
* on a subsequent allocation.
*/
- SetHPageRestoreReserve(page);
+ folio_set_hugetlb_restore_reserve(folio);
} else if (rc < 0) {
/*
* Rare out of memory condition from
@@ -2875,12 +2876,12 @@ void restore_reserve_on_error(struct hst
/*
* For private mappings, no entry indicates
* a reservation is present. Since we can
- * not add an entry, set SetHPageRestoreReserve
- * on the page so reserve count will be
+ * not add an entry, set hugetlb_restore_reserve
+ * on the folio so reserve count will be
* incremented when freed. This reserve will
* be consumed on a subsequent allocation.
*/
- SetHPageRestoreReserve(page);
+ folio_set_hugetlb_restore_reserve(folio);
} else
/*
* No reservation present, do nothing
_
Patches currently in -mm which might be from sidhartha.kumar@xxxxxxxxxx are
mm-move-folio_set_compound_order-to-mm-internalh.patch
mm-introduce-folio_is_pfmemalloc.patch
mm-remove-the-hugetlb-field-from-struct-page.patch
mm-memory-failure-convert-__get_huge_page_for_hwpoison-to-folios.patch
mm-memory-failure-convert-try_memory_failure_hugetlb-to-folios.patch
mm-memory-failure-convert-hugetlb_clear_page_hwpoison-to-folios.patch
mm-memory-failure-convert-free_raw_hwp_pages-to-folios.patch
mm-memory-failure-convert-raw_hwp_list_head-to-folios.patch
mm-memory-failure-convert-__free_raw_hwp_pages-to-folios.patch
mm-memory-failure-convert-hugetlb_set_page_hwpoison-to-folios.patch
mm-memory-failure-convert-unpoison_memory-to-folios.patch
mm-hugetlb-convert-isolate_hugetlb-to-folios.patch
mm-hugetlb-convert-__update_and_free_page-to-folios.patch
mm-hugetlb-convert-dequeue_hugetlb_page-functions-to-folios.patch
mm-hugetlb-convert-alloc_surplus_huge_page-to-folios.patch
mm-hugetlb-increase-use-of-folios-in-alloc_huge_page.patch
mm-hugetlb-convert-alloc_migrate_huge_page-to-folios.patch
mm-hugetlb-convert-restore_reserve_on_error-to-folios.patch
mm-hugetlb-convert-demote_free_huge_page-to-folios.patch
