[PATCH v4 62/66] mm/swapfile: Use maple tree iterator instead of vma linked list
Liam Howlett
liam.howlett at oracle.com
Wed Dec 1 06:30:24 PST 2021
From: "Liam R. Howlett" <Liam.Howlett at Oracle.com>
Signed-off-by: Liam R. Howlett <Liam.Howlett at Oracle.com>
---
mm/swapfile.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/mm/swapfile.c b/mm/swapfile.c
index e59e08ef46e1..21c88b0944f9 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -2103,15 +2103,18 @@ static int unuse_mm(struct mm_struct *mm, unsigned int type,
{
struct vm_area_struct *vma;
int ret = 0;
+ MA_STATE(mas, &mm->mm_mt, 0, 0);
mmap_read_lock(mm);
- for (vma = mm->mmap; vma; vma = vma->vm_next) {
+ mas_for_each(&mas, vma, ULONG_MAX) {
if (vma->anon_vma) {
ret = unuse_vma(vma, type, frontswap,
fs_pages_to_unuse);
if (ret)
break;
}
+
+ mas_pause(&mas);
cond_resched();
}
mmap_read_unlock(mm);
--
2.30.2
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