From 3a8db2258deaaacd03e474c606e15a8f62f6f497 Mon Sep 17 00:00:00 2001 From: "Liam R. Howlett" Date: Thu, 8 Apr 2021 16:21:58 -0400 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. Signed-off-by: Liam R. Howlett --- mm/khugepaged.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 6c0185fdd815..33cf91529f0b 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -1431,7 +1431,7 @@ static int khugepaged_add_pte_mapped_thp(struct mm_struct *mm, 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, _pmd; -- 2.49.0