From f96376c653b96f4c0e1be0d79dedf2176f27266f Mon Sep 17 00:00:00 2001 From: "Liam R. Howlett" Date: Tue, 21 Jun 2022 20:46:58 +0000 Subject: [PATCH] mm/khugepaged: optimize collapse_pte_mapped_thp() by using vma_lookup() vma_lookup() will walk the vma tree once and not continue to look for the next vma. Since the exact vma is checked below, this is a more optimal way of searching. Link: https://lkml.kernel.org/r/20220504011345.662299-6-Liam.Howlett@oracle.com Link: https://lkml.kernel.org/r/20220621204632.3370049-22-Liam.Howlett@oracle.com Signed-off-by: Liam R. Howlett Reviewed-by: Vlastimil Babka Cc: Catalin Marinas Cc: David Howells Cc: "Matthew Wilcox (Oracle)" Cc: SeongJae Park Cc: Will Deacon Cc: Davidlohr Bueso Signed-off-by: Andrew Morton --- mm/khugepaged.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 16be62d493cd..8dbd68c414d9 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -1426,7 +1426,7 @@ static void collapse_and_free_pmd(struct mm_struct *mm, struct vm_area_struct *v void collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr) { unsigned long haddr = addr & HPAGE_PMD_MASK; - struct vm_area_struct *vma = find_vma(mm, haddr); + struct vm_area_struct *vma = vma_lookup(mm, haddr); struct page *hpage; pte_t *start_pte, *pte; pmd_t *pmd; -- 2.50.1