From: Liam R. Howlett Date: Thu, 14 Apr 2022 06:07:15 +0000 (-0700) Subject: mm/khugepaged: optimize collapse_pte_mapped_thp() by using vma_lookup() X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=d532db53e2248fe16ce6d8c740cf8bf1b09c7f50;p=users%2Fjedix%2Flinux-maple.git 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 Reviewed-by: Vlastimil Babka --- diff --git a/mm/khugepaged.c b/mm/khugepaged.c index ac53ad2c9bb1..03fda93ade3e 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -1435,7 +1435,7 @@ 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;