The patch titled
Subject: mm/hugetlb: convert destroy_compound_gigantic_page() to folios
has been added to the -mm mm-unstable branch. Its filename is
mm-hugetlb-convert-destroy_compound_gigantic_page-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-destroy_compound_gigantic_page-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
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Subject: mm/hugetlb: convert destroy_compound_gigantic_page() to folios
Date: Tue, 29 Nov 2022 14:50:31 -0800
Convert page operations within __destroy_compound_gigantic_page() to the
corresponding folio operations.
Link: https://lkml.kernel.org/r/20221129225039.82257-3-sidhartha.kumar@xxxxxxxxxx
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Mina Almasry <almasrymina@xxxxxxxxxx>
Cc: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Cc: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Cc: Tarun Sahu <tsahu@xxxxxxxxxxxxx>
Cc: Wei Chen <harperchen1110@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 43 +++++++++++++++++++++----------------------
1 file changed, 21 insertions(+), 22 deletions(-)
--- a/mm/hugetlb.c~mm-hugetlb-convert-destroy_compound_gigantic_page-to-folios
+++ a/mm/hugetlb.c
@@ -1325,43 +1325,40 @@ static int hstate_next_node_to_free(stru
nr_nodes--)
/* used to demote non-gigantic_huge pages as well */
-static void __destroy_compound_gigantic_page(struct page *page,
+static void __destroy_compound_gigantic_folio(struct folio *folio,
unsigned int order, bool demote)
{
int i;
int nr_pages = 1 << order;
struct page *p;
- atomic_set(compound_mapcount_ptr(page), 0);
- atomic_set(subpages_mapcount_ptr(page), 0);
- atomic_set(compound_pincount_ptr(page), 0);
+ atomic_set(folio_mapcount_ptr(folio), 0);
+ atomic_set(folio_subpages_mapcount_ptr(folio), 0);
+ atomic_set(folio_pincount_ptr(folio), 0);
for (i = 1; i < nr_pages; i++) {
- p = nth_page(page, i);
+ p = folio_page(folio, i);
p->mapping = NULL;
clear_compound_head(p);
if (!demote)
set_page_refcounted(p);
}
- set_compound_order(page, 0);
-#ifdef CONFIG_64BIT
- page[1].compound_nr = 0;
-#endif
- __ClearPageHead(page);
+ folio_set_compound_order(folio, 0);
+ __folio_clear_head(folio);
}
-static void destroy_compound_hugetlb_page_for_demote(struct page *page,
+static void destroy_compound_hugetlb_folio_for_demote(struct folio *folio,
unsigned int order)
{
- __destroy_compound_gigantic_page(page, order, true);
+ __destroy_compound_gigantic_folio(folio, order, true);
}
#ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
-static void destroy_compound_gigantic_page(struct page *page,
+static void destroy_compound_gigantic_folio(struct folio *folio,
unsigned int order)
{
- __destroy_compound_gigantic_page(page, order, false);
+ __destroy_compound_gigantic_folio(folio, order, false);
}
static void free_gigantic_page(struct page *page, unsigned int order)
@@ -1430,7 +1427,7 @@ static struct page *alloc_gigantic_page(
return NULL;
}
static inline void free_gigantic_page(struct page *page, unsigned int order) { }
-static inline void destroy_compound_gigantic_page(struct page *page,
+static inline void destroy_compound_gigantic_folio(struct folio *folio,
unsigned int order) { }
#endif
@@ -1477,8 +1474,8 @@ static void __remove_hugetlb_page(struct
*
* For gigantic pages set the destructor to the null dtor. This
* destructor will never be called. Before freeing the gigantic
- * page destroy_compound_gigantic_page will turn the compound page
- * into a simple group of pages. After this the destructor does not
+ * page destroy_compound_gigantic_folio will turn the folio into a
+ * simple group of pages. After this the destructor does not
* apply.
*
* This handles the case where more than one ref is held when and
@@ -1559,6 +1556,7 @@ static void add_hugetlb_page(struct hsta
static void __update_and_free_page(struct hstate *h, struct page *page)
{
int i;
+ struct folio *folio = page_folio(page);
struct page *subpage;
if (hstate_is_gigantic(h) && !gigantic_page_runtime_supported())
@@ -1587,8 +1585,8 @@ static void __update_and_free_page(struc
* Move PageHWPoison flag from head page to the raw error pages,
* which makes any healthy subpages reusable.
*/
- if (unlikely(PageHWPoison(page)))
- hugetlb_clear_page_hwpoison(page);
+ if (unlikely(folio_test_hwpoison(folio)))
+ hugetlb_clear_page_hwpoison(&folio->page);
for (i = 0; i < pages_per_huge_page(h); i++) {
subpage = nth_page(page, i);
@@ -1604,7 +1602,7 @@ static void __update_and_free_page(struc
*/
if (hstate_is_gigantic(h) ||
hugetlb_cma_page(page, huge_page_order(h))) {
- destroy_compound_gigantic_page(page, huge_page_order(h));
+ destroy_compound_gigantic_folio(folio, huge_page_order(h));
free_gigantic_page(page, huge_page_order(h));
} else {
__free_pages(page, huge_page_order(h));
@@ -3437,6 +3435,7 @@ static int demote_free_huge_page(struct
{
int i, nid = page_to_nid(page);
struct hstate *target_hstate;
+ struct folio *folio = page_folio(page);
struct page *subpage;
int rc = 0;
@@ -3455,10 +3454,10 @@ static int demote_free_huge_page(struct
}
/*
- * Use destroy_compound_hugetlb_page_for_demote for all huge page
+ * Use destroy_compound_hugetlb_folio_for_demote for all huge page
* sizes as it will not ref count pages.
*/
- destroy_compound_hugetlb_page_for_demote(page, huge_page_order(h));
+ destroy_compound_hugetlb_folio_for_demote(folio, huge_page_order(h));
/*
* Taking target hstate mutex synchronizes with set_max_huge_pages.
_
Patches currently in -mm which might be from sidhartha.kumar@xxxxxxxxxx are
mm-hugetlb_cgroup-convert-__set_hugetlb_cgroup-to-folios.patch
mm-hugetlb_cgroup-convert-hugetlb_cgroup_from_page-to-folios.patch
mm-hugetlb_cgroup-convert-set_hugetlb_cgroup-to-folios.patch
mm-hugetlb_cgroup-convert-hugetlb_cgroup_migrate-to-folios.patch
mm-hugetlb-convert-isolate_or_dissolve_huge_page-to-folios.patch
mm-hugetlb-convert-free_huge_page-to-folios.patch
mm-hugetlb_cgroup-convert-hugetlb_cgroup_uncharge_page-to-folios.patch
mm-hugeltb_cgroup-convert-hugetlb_cgroup_commit_charge-to-folios.patch
mm-hugetlb-convert-move_hugetlb_state-to-folios.patch
mm-add-folio-dtor-and-order-setter-functions.patch
mm-hugetlb-convert-destroy_compound_gigantic_page-to-folios.patch
mm-hugetlb-convert-dissolve_free_huge_page-to-folios.patch
mm-hugetlb-convert-remove_hugetlb_page-to-folios.patch
mm-hugetlb-convert-update_and_free_page-to-folios.patch
mm-hugetlb-convert-add_hugetlb_page-to-folios-and-add-hugetlb_cma_folio.patch
mm-hugetlb-convert-enqueue_huge_page-to-folios.patch
mm-hugetlb-convert-free_gigantic_page-to-folios.patch
mm-hugetlb-convert-hugetlb-prep-functions-to-folios.patch
mm-hugetlb-change-hugetlb-allocation-functions-to-return-a-folio.patch
