[PATCH v2 59/61] mm/swapfile: Use maple tree iterator instead of vma linked list
From: Liam Howlett <hidden>
Date: 2021-08-17 15:56:24
Also in:
lkml
Subsystem:
memory management, memory management - swap, the rest · Maintainers:
Andrew Morton, Chris Li, Kairui Song, Linus Torvalds
From: "Liam R. Howlett" <redacted> Signed-off-by: Liam R. Howlett <redacted> --- mm/swapfile.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/mm/swapfile.c b/mm/swapfile.c
index e3dcaeecc50f..32c40aa75e85 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c@@ -2103,17 +2103,24 @@ 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_lock(&mas); + 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_unlock(&mas); + mas_pause(&mas); cond_resched(); + mas_lock(&mas); } + mas_unlock(&mas); mmap_read_unlock(mm); return ret; }
--
2.30.2