From: Liam R. Howlett Date: Thu, 8 Apr 2021 20:21:58 +0000 (-0400) Subject: mm/khugepaged: Optimize collapse_pte_mapped_thp() by using vma_lookup() X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=61f5c8889da2721b0ddcfb93a38b07a55ce3a395;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 131492fd1148..7507b786f1a0 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -1446,7 +1446,7 @@ 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;