From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Use vma iterator & find_vma() instead of vma linked list.
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Reviewed-by: Davidlohr Bueso <dave@xxxxxxxxxxxx>
---
mm/huge_memory.c | 4 ++--
mm/khugepaged.c | 9 ++++++---
2 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 66bf4c7f716b..428c42bfd4c4 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2339,11 +2339,11 @@ void vma_adjust_trans_huge(struct vm_area_struct *vma,
split_huge_pmd_if_needed(vma, end);
/*
- * If we're also updating the vma->vm_next->vm_start,
+ * If we're also updating the next vma vm_start,
* check if we need to split it.
*/
if (adjust_next > 0) {
- struct vm_area_struct *next = vma->vm_next;
+ struct vm_area_struct *next = find_vma(vma->vm_mm, vma->vm_end);
unsigned long nstart = next->vm_start;
nstart += adjust_next;
split_huge_pmd_if_needed(next, nstart);
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index d3313b7a8fe5..126dc35276c4 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -2053,6 +2053,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages, int *result,
__releases(&khugepaged_mm_lock)
__acquires(&khugepaged_mm_lock)
{
+ struct vma_iterator vmi;
struct mm_slot *mm_slot;
struct mm_struct *mm;
struct vm_area_struct *vma;
@@ -2081,11 +2082,13 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages, int *result,
vma = NULL;
if (unlikely(!mmap_read_trylock(mm)))
goto breakouterloop_mmap_lock;
- if (likely(!hpage_collapse_test_exit(mm)))
- vma = find_vma(mm, khugepaged_scan.address);
progress++;
- for (; vma; vma = vma->vm_next) {
+ if (unlikely(hpage_collapse_test_exit(mm)))
+ goto breakouterloop;
+
+ vma_iter_init(&vmi, mm, khugepaged_scan.address);
+ for_each_vma(vmi, vma) {
unsigned long hstart, hend;
cond_resched();
--
2.35.1
