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From:   Liam Howlett <liam.howlett@oracle.com>
To:     "maple-tree@lists.infradead.org" <maple-tree@lists.infradead.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
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        Rik van Riel <riel@surriel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Michel Lespinasse <walken.cr@gmail.com>,
        Liam Howlett <liam.howlett@oracle.com>
Subject: [PATCH 85/94] mm/oom_kill: Use maple tree iterators instead of vma
 linked list
Thread-Topic: [PATCH 85/94] mm/oom_kill: Use maple tree iterators instead of
 vma linked list
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Date:   Wed, 28 Apr 2021 15:36:29 +0000
Message-ID: <20210428153542.2814175-86-Liam.Howlett@Oracle.com>
References: <20210428153542.2814175-1-Liam.Howlett@Oracle.com>
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Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---
 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 54527de9cd2d..1f6491965802 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -515,6 +515,7 @@ bool __oom_reap_task_mm(struct mm_struct *mm)
 {
 	struct vm_area_struct *vma;
 	bool ret =3D true;
+	MA_STATE(mas, &mm->mm_mt, 0, 0);
=20
 	/*
 	 * Tell all users of get_user/copy_from_user etc... that the content
@@ -524,7 +525,8 @@ bool __oom_reap_task_mm(struct mm_struct *mm)
 	 */
 	set_bit(MMF_UNSTABLE, &mm->flags);
=20
-	for (vma =3D mm->mmap ; vma; vma =3D vma->vm_next) {
+	rcu_read_lock();
+	mas_for_each(&mas, vma, ULONG_MAX) {
 		if (!can_madv_lru_vma(vma))
 			continue;
=20
@@ -556,6 +558,7 @@ bool __oom_reap_task_mm(struct mm_struct *mm)
 			tlb_finish_mmu(&tlb);
 		}
 	}
+	rcu_read_unlock();
=20
 	return ret;
 }
--=20
2.30.2