[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20231103140119.2306578-7-wangkefeng.wang@huawei.com>
Date: Fri, 3 Nov 2023 22:01:07 +0800
From: Kefeng Wang <wangkefeng.wang@...wei.com>
To: Andrew Morton <akpm@...ux-foundation.org>
CC: <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
Matthew Wilcox <willy@...radead.org>,
David Hildenbrand <david@...hat.com>,
<linux-s390@...r.kernel.org>,
Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH 06/18] mm: huge_memory: use a folio in __split_huge_pmd_locked()
Use a folio in __split_huge_pmd_locked() which replaces six
compound_head() call with two page_folio() calls.
Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
mm/huge_memory.c | 19 ++++++++++---------
1 file changed, 10 insertions(+), 9 deletions(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 34001ef9d029..054336ecab0a 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2117,6 +2117,7 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd,
count_vm_event(THP_SPLIT_PMD);
if (!vma_is_anonymous(vma)) {
+ struct folio *folio;
old_pmd = pmdp_huge_clear_flush(vma, haddr, pmd);
/*
* We are going to unmap this huge page. So
@@ -2130,17 +2131,17 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd,
swp_entry_t entry;
entry = pmd_to_swp_entry(old_pmd);
- page = pfn_swap_entry_to_page(entry);
+ folio = pfn_swap_entry_to_folio(entry);
} else {
- page = pmd_page(old_pmd);
- if (!PageDirty(page) && pmd_dirty(old_pmd))
- set_page_dirty(page);
- if (!PageReferenced(page) && pmd_young(old_pmd))
- SetPageReferenced(page);
- page_remove_rmap(page, vma, true);
- put_page(page);
+ folio = page_folio(pmd_page(old_pmd));
+ if (!folio_test_dirty(folio) && pmd_dirty(old_pmd))
+ folio_set_dirty(folio);
+ if (!folio_test_referenced(folio) && pmd_young(old_pmd))
+ folio_set_referenced(folio);
+ page_remove_rmap(&folio->page, vma, true);
+ folio_put(folio);
}
- add_mm_counter(mm, mm_counter_file(page), -HPAGE_PMD_NR);
+ add_mm_counter(mm, mm_counter_file_folio(folio), -HPAGE_PMD_NR);
return;
}
--
2.27.0
Powered by blists - more mailing lists