The patch titled
Subject: mm/hugetlb: convert isolate_hugetlb to folios
has been added to the -mm mm-unstable branch. Its filename is
mm-hugetlb-convert-isolate_hugetlb-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-isolate_hugetlb-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 isolate_hugetlb to folios
Date: Fri, 13 Jan 2023 16:30:50 -0600
Patch series "continue hugetlb folio conversion", v3.
This series continues the conversion of core hugetlb functions to use
folios. This series converts many helper funtions in the hugetlb fault
path. This is in preperation for another series to convert the hugetlb
fault code paths to operate on folios.
This patch (of 8):
Convert isolate_hugetlb() to take in a folio and convert its callers to
pass a folio. Use page_folio() to convert the callers to use a folio is
safe as isolate_hugetlb() operates on a head page.
Link: https://lkml.kernel.org/r/20230113223057.173292-1-sidhartha.kumar@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20230113223057.173292-2-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: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/include/linux/hugetlb.h~mm-hugetlb-convert-isolate_hugetlb-to-folios
+++ a/include/linux/hugetlb.h
@@ -170,7 +170,7 @@ bool hugetlb_reserve_pages(struct inode
vm_flags_t vm_flags);
long hugetlb_unreserve_pages(struct inode *inode, long start, long end,
long freed);
-int isolate_hugetlb(struct page *page, struct list_head *list);
+int isolate_hugetlb(struct folio *folio, struct list_head *list);
int get_hwpoison_huge_page(struct page *page, bool *hugetlb, bool unpoison);
int get_huge_page_for_hwpoison(unsigned long pfn, int flags,
bool *migratable_cleared);
@@ -412,7 +412,7 @@ static inline pte_t *huge_pte_offset(str
return NULL;
}
-static inline int isolate_hugetlb(struct page *page, struct list_head *list)
+static inline int isolate_hugetlb(struct folio *folio, struct list_head *list)
{
return -EBUSY;
}
--- a/mm/gup.c~mm-hugetlb-convert-isolate_hugetlb-to-folios
+++ a/mm/gup.c
@@ -1905,7 +1905,7 @@ static unsigned long collect_longterm_un
continue;
if (folio_test_hugetlb(folio)) {
- isolate_hugetlb(&folio->page, movable_page_list);
+ isolate_hugetlb(folio, movable_page_list);
continue;
}
--- a/mm/hugetlb.c~mm-hugetlb-convert-isolate_hugetlb-to-folios
+++ a/mm/hugetlb.c
@@ -2925,7 +2925,7 @@ retry:
* Fail with -EBUSY if not possible.
*/
spin_unlock_irq(&hugetlb_lock);
- ret = isolate_hugetlb(&old_folio->page, list);
+ ret = isolate_hugetlb(old_folio, list);
spin_lock_irq(&hugetlb_lock);
goto free_new;
} else if (!folio_test_hugetlb_freed(old_folio)) {
@@ -3000,7 +3000,7 @@ int isolate_or_dissolve_huge_page(struct
if (hstate_is_gigantic(h))
return -ENOMEM;
- if (folio_ref_count(folio) && !isolate_hugetlb(&folio->page, list))
+ if (folio_ref_count(folio) && !isolate_hugetlb(folio, list))
ret = 0;
else if (!folio_ref_count(folio))
ret = alloc_and_dissolve_hugetlb_folio(h, folio, list);
@@ -7250,19 +7250,19 @@ __weak unsigned long hugetlb_mask_last_p
* These functions are overwritable if your architecture needs its own
* behavior.
*/
-int isolate_hugetlb(struct page *page, struct list_head *list)
+int isolate_hugetlb(struct folio *folio, struct list_head *list)
{
int ret = 0;
spin_lock_irq(&hugetlb_lock);
- if (!PageHeadHuge(page) ||
- !HPageMigratable(page) ||
- !get_page_unless_zero(page)) {
+ if (!folio_test_hugetlb(folio) ||
+ !folio_test_hugetlb_migratable(folio) ||
+ !folio_try_get(folio)) {
ret = -EBUSY;
goto unlock;
}
- ClearHPageMigratable(page);
- list_move_tail(&page->lru, list);
+ folio_clear_hugetlb_migratable(folio);
+ list_move_tail(&folio->lru, list);
unlock:
spin_unlock_irq(&hugetlb_lock);
return ret;
--- a/mm/memory-failure.c~mm-hugetlb-convert-isolate_hugetlb-to-folios
+++ a/mm/memory-failure.c
@@ -2437,7 +2437,7 @@ static bool isolate_page(struct page *pa
bool isolated = false;
if (PageHuge(page)) {
- isolated = !isolate_hugetlb(page, pagelist);
+ isolated = !isolate_hugetlb(page_folio(page), pagelist);
} else {
bool lru = !__PageMovable(page);
--- a/mm/memory_hotplug.c~mm-hugetlb-convert-isolate_hugetlb-to-folios
+++ a/mm/memory_hotplug.c
@@ -1641,7 +1641,7 @@ do_migrate_range(unsigned long start_pfn
if (PageHuge(page)) {
pfn = page_to_pfn(head) + compound_nr(head) - 1;
- isolate_hugetlb(head, &source);
+ isolate_hugetlb(folio, &source);
continue;
} else if (PageTransHuge(page))
pfn = page_to_pfn(head) + thp_nr_pages(page) - 1;
--- a/mm/mempolicy.c~mm-hugetlb-convert-isolate_hugetlb-to-folios
+++ a/mm/mempolicy.c
@@ -601,7 +601,7 @@ static int queue_pages_hugetlb(pte_t *pt
/* With MPOL_MF_MOVE, we migrate only unshared hugepage. */
if (flags & (MPOL_MF_MOVE_ALL) ||
(flags & MPOL_MF_MOVE && page_mapcount(page) == 1)) {
- if (isolate_hugetlb(page, qp->pagelist) &&
+ if (isolate_hugetlb(page_folio(page), qp->pagelist) &&
(flags & MPOL_MF_STRICT))
/*
* Failed to isolate page but allow migrating pages
--- a/mm/migrate.c~mm-hugetlb-convert-isolate_hugetlb-to-folios
+++ a/mm/migrate.c
@@ -2106,7 +2106,7 @@ static int add_page_for_migration(struct
if (PageHuge(page)) {
if (PageHead(page)) {
- err = isolate_hugetlb(page, pagelist);
+ err = isolate_hugetlb(page_folio(page), pagelist);
if (!err)
err = 1;
}
_
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
