[PATCH v2 57/61] mm/oom_kill: Use maple tree iterators instead of vma linked list
From: Liam Howlett <hidden>
Date: 2021-08-17 15:55:53
Also in:
lkml
Subsystem:
memory management, memory management - oom killer, the rest · Maintainers:
Andrew Morton, Michal Hocko, Linus Torvalds
From: "Liam R. Howlett" <redacted> Signed-off-by: Liam R. Howlett <redacted> --- mm/oom_kill.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 431d38c3bba8..40a01f334735 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c@@ -519,6 +519,7 @@ bool __oom_reap_task_mm(struct mm_struct *mm) { struct vm_area_struct *vma; bool ret = true; + MA_STATE(mas, &mm->mm_mt, 0, 0); /* * Tell all users of get_user/copy_from_user etc... that the content
@@ -528,7 +529,8 @@ bool __oom_reap_task_mm(struct mm_struct *mm) */ set_bit(MMF_UNSTABLE, &mm->flags); - for (vma = mm->mmap ; vma; vma = vma->vm_next) { + rcu_read_lock(); + mas_for_each(&mas, vma, ULONG_MAX) { if (!can_madv_lru_vma(vma)) continue;
@@ -560,6 +562,7 @@ bool __oom_reap_task_mm(struct mm_struct *mm) tlb_finish_mmu(&tlb); } } + rcu_read_unlock(); return ret; }
--
2.30.2