The patch titled
Subject: mm: convert lru_add_page_tail() to lru_add_split_folio()
has been added to the -mm mm-unstable branch. Its filename is
mm-convert-lru_add_page_tail-to-lru_add_split_folio.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-convert-lru_add_page_tail-to-lru_add_split_folio.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: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: mm: convert lru_add_page_tail() to lru_add_split_folio()
Date: Thu, 13 Mar 2025 15:14:56 +0000
Remove three hidden calls to compound_head() and accesses to page->lru.
Link: https://lkml.kernel.org/r/20250313151458.4145978-1-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Reviewed-by: Zi Yan <ziy@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/huge_memory.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
--- a/mm/huge_memory.c~mm-convert-lru_add_page_tail-to-lru_add_split_folio
+++ a/mm/huge_memory.c
@@ -3262,25 +3262,25 @@ static void remap_page(struct folio *fol
}
}
-static void lru_add_page_tail(struct folio *folio, struct page *tail,
+static void lru_add_split_folio(struct folio *folio, struct folio *new_folio,
struct lruvec *lruvec, struct list_head *list)
{
- VM_BUG_ON_FOLIO(PageLRU(tail), folio);
+ VM_BUG_ON_FOLIO(folio_test_lru(new_folio), folio);
lockdep_assert_held(&lruvec->lru_lock);
if (list) {
/* page reclaim is reclaiming a huge page */
VM_WARN_ON(folio_test_lru(folio));
- get_page(tail);
- list_add_tail(&tail->lru, list);
+ folio_get(new_folio);
+ list_add_tail(&new_folio->lru, list);
} else {
/* head is still on lru (and we have it frozen) */
VM_WARN_ON(!folio_test_lru(folio));
if (folio_test_unevictable(folio))
- tail->mlock_count = 0;
+ new_folio->mlock_count = 0;
else
- list_add_tail(&tail->lru, &folio->lru);
- SetPageLRU(tail);
+ list_add_tail(&new_folio->lru, &folio->lru);
+ folio_set_lru(new_folio);
}
}
@@ -3581,8 +3581,8 @@ after_split:
((mapping || swap_cache) ?
folio_nr_pages(release) : 0));
- lru_add_page_tail(origin_folio, &release->page,
- lruvec, list);
+ lru_add_split_folio(origin_folio, release, lruvec,
+ list);
/* Some pages can be beyond EOF: drop them from cache */
if (release->index >= end) {
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
mm-decline-to-manipulate-the-refcount-on-a-slab-page.patch
dax-remove-access-to-page-index.patch
dax-use-folios-more-widely-within-dax.patch
fs-convert-block_commit_write-to-take-a-folio.patch
fs-remove-page_file_mapping.patch
fs-remove-folio_file_mapping.patch
mm-assert-the-folio-is-locked-in-folio_start_writeback.patch
hugetlb-convert-hugetlb_vma_maps_page-to-hugetlb_vma_maps_pfn.patch
hugetlb-convert-adjust_range_hwpoison-to-take-a-folio.patch
mm-convert-lru_add_page_tail-to-lru_add_split_folio.patch
ocfs2-use-memcpy_to_folio-in-ocfs2_symlink_get_block.patch
ocfs2-remove-reference-to-bh-b_page.patch
