The patch titled
Subject: mm/hugetlb: convert demote_free_huge_page to folios
has been added to the -mm mm-unstable branch. Its filename is
mm-hugetlb-convert-demote_free_huge_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-demote_free_huge_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
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------------------------------------------------------
From: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Subject: mm/hugetlb: convert demote_free_huge_page to folios
Date: Fri, 13 Jan 2023 16:30:57 -0600
Change demote_free_huge_page to demote_free_hugetlb_folio() and change
demote_pool_huge_page() pass in a folio.
Link: https://lkml.kernel.org/r/20230113223057.173292-9-sidhartha.kumar@xxxxxxxxxx
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@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/mm/hugetlb.c~mm-hugetlb-convert-demote_free_huge_page-to-folios
+++ a/mm/hugetlb.c
@@ -3579,12 +3579,12 @@ out:
return 0;
}
-static int demote_free_huge_page(struct hstate *h, struct page *page)
+static int demote_free_hugetlb_folio(struct hstate *h, struct folio *folio)
{
- int i, nid = page_to_nid(page);
+ int i, nid = folio_nid(folio);
struct hstate *target_hstate;
- struct folio *folio = page_folio(page);
struct page *subpage;
+ struct folio *inner_folio;
int rc = 0;
target_hstate = size_to_hstate(PAGE_SIZE << h->demote_order);
@@ -3592,18 +3592,18 @@ static int demote_free_huge_page(struct
remove_hugetlb_folio_for_demote(h, folio, false);
spin_unlock_irq(&hugetlb_lock);
- rc = hugetlb_vmemmap_restore(h, page);
+ rc = hugetlb_vmemmap_restore(h, &folio->page);
if (rc) {
- /* Allocation of vmemmmap failed, we can not demote page */
+ /* Allocation of vmemmmap failed, we can not demote folio */
spin_lock_irq(&hugetlb_lock);
- set_page_refcounted(page);
- add_hugetlb_folio(h, page_folio(page), false);
+ folio_ref_unfreeze(folio, 1);
+ add_hugetlb_folio(h, folio, false);
return rc;
}
/*
* Use destroy_compound_hugetlb_folio_for_demote for all huge page
- * sizes as it will not ref count pages.
+ * sizes as it will not ref count folios.
*/
destroy_compound_hugetlb_folio_for_demote(folio, huge_page_order(h));
@@ -3618,15 +3618,15 @@ static int demote_free_huge_page(struct
mutex_lock(&target_hstate->resize_lock);
for (i = 0; i < pages_per_huge_page(h);
i += pages_per_huge_page(target_hstate)) {
- subpage = nth_page(page, i);
- folio = page_folio(subpage);
+ subpage = folio_page(folio, i);
+ inner_folio = page_folio(subpage);
if (hstate_is_gigantic(target_hstate))
- prep_compound_gigantic_folio_for_demote(folio,
+ prep_compound_gigantic_folio_for_demote(inner_folio,
target_hstate->order);
else
prep_compound_page(subpage, target_hstate->order);
- set_page_private(subpage, 0);
- prep_new_hugetlb_folio(target_hstate, folio, nid);
+ folio_change_private(inner_folio, NULL);
+ prep_new_hugetlb_folio(target_hstate, inner_folio, nid);
free_huge_page(subpage);
}
mutex_unlock(&target_hstate->resize_lock);
@@ -3648,7 +3648,7 @@ static int demote_pool_huge_page(struct
__must_hold(&hugetlb_lock)
{
int nr_nodes, node;
- struct page *page;
+ struct folio *folio;
lockdep_assert_held(&hugetlb_lock);
@@ -3659,11 +3659,10 @@ static int demote_pool_huge_page(struct
}
for_each_node_mask_to_free(h, nr_nodes, node, nodes_allowed) {
- list_for_each_entry(page, &h->hugepage_freelists[node], lru) {
- if (PageHWPoison(page))
+ list_for_each_entry(folio, &h->hugepage_freelists[node], lru) {
+ if (folio_test_hwpoison(folio))
continue;
-
- return demote_free_huge_page(h, page);
+ return demote_free_hugetlb_folio(h, folio);
}
}
_
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
