The quilt patch titled
Subject: mm: optimize find_exact_vma() to use vma_lookup()
has been removed from the -mm tree. Its filename was
mm-optimize-find_exact_vma-to-use-vma_lookup.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>
Subject: mm: optimize find_exact_vma() to use vma_lookup()
Date: Tue, 6 Sep 2022 19:48:49 +0000
Use vma_lookup() to walk the tree to the start value requested. If the
vma at the start does not match, then the answer is NULL and there is no
need to look at the next vma the way that find_vma() would.
Link: https://lkml.kernel.org/r/20220906194824.2110408-21-Liam.Howlett@xxxxxxxxxx
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Reviewed-by: Vlastimil Babka <vbabka@xxxxxxx>
Tested-by: Yu Zhao <yuzhao@xxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Davidlohr Bueso <dave@xxxxxxxxxxxx>
Cc: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Cc: SeongJae Park <sj@xxxxxxxxxx>
Cc: Sven Schnelle <svens@xxxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mm.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/include/linux/mm.h~mm-optimize-find_exact_vma-to-use-vma_lookup
+++ a/include/linux/mm.h
@@ -2850,7 +2850,7 @@ static inline unsigned long vma_pages(st
static inline struct vm_area_struct *find_exact_vma(struct mm_struct *mm,
unsigned long vm_start, unsigned long vm_end)
{
- struct vm_area_struct *vma = find_vma(mm, vm_start);
+ struct vm_area_struct *vma = vma_lookup(mm, vm_start);
if (vma && (vma->vm_start != vm_start || vma->vm_end != vm_end))
vma = NULL;
_
Patches currently in -mm which might be from Liam.Howlett@xxxxxxxxxx are
