| From | Liam Howlett <> | Subject | [PATCH v12 21/69] mm/khugepaged: optimize collapse_pte_mapped_thp() by using vma_lookup() | Date | Wed, 20 Jul 2022 02:17:50 +0000 |
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From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>
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 <Liam.Howlett@Oracle.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: David Howells <dhowells@redhat.com> Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org> Cc: SeongJae Park <sj@kernel.org> Cc: Will Deacon <will@kernel.org> Cc: Davidlohr Bueso <dave@stgolabs.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> --- 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; -- 2.35.1
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