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Message-ID: <20220621204632.3370049-22-Liam.Howlett@oracle.com>
Date: Tue, 21 Jun 2022 20:46:58 +0000
From: Liam Howlett <liam.howlett@...cle.com>
To: "maple-tree@...ts.infradead.org" <maple-tree@...ts.infradead.org>,
"linux-mm@...ck.org" <linux-mm@...ck.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
"damon @ lists . linux . dev" <damon@...ts.linux.dev>,
SeongJae Park <sj@...nel.org>,
David Hildenbrand <david@...hat.com>
Subject: [PATCH v10 21/69] mm/khugepaged: optimize collapse_pte_mapped_thp()
by using vma_lookup()
From: "Liam R. Howlett" <Liam.Howlett@...cle.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
Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com>
Reviewed-by: Vlastimil Babka <vbabka@...e.cz>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: David Howells <dhowells@...hat.com>
Cc: "Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc: SeongJae Park <sj@...nel.org>
Cc: Will Deacon <will@...nel.org>
Cc: Davidlohr Bueso <dave@...olabs.net>
Signed-off-by: Andrew Morton <akpm@...ux-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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