[PATCH v2 14/61] mm/khugepaged: Optimize collapse_pte_mapped_thp() by using vma_lookup()
From: Liam Howlett <hidden>
Date: 2021-08-17 15:50:52
Also in:
lkml
Subsystem:
memory management, memory management - thp (transparent huge page), the rest · Maintainers:
Andrew Morton, David Hildenbrand, Lorenzo Stoakes, Linus Torvalds
From: "Liam R. Howlett" <redacted> 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 <redacted> --- mm/khugepaged.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 6b9c98ddcd09..3a43610141bb 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c@@ -1430,7 +1430,7 @@ 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;
--
2.30.2