From: Muchun Song <songmuchun@bytedance.com>
To: guro@fb.com, hannes@cmpxchg.org, mhocko@kernel.org,
akpm@linux-foundation.org, shakeelb@google.com,
vdavydov.dev@gmail.com
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
duanxiongchun@bytedance.com, fam.zheng@bytedance.com,
bsingharora@gmail.com, shy828301@gmail.com,
alex.shi@linux.alibaba.com,
Muchun Song <songmuchun@bytedance.com>
Subject: [RFC PATCH v3 11/12] mm: lru: add VM_BUG_ON_PAGE to lru maintenance function
Date: Wed, 21 Apr 2021 15:00:58 +0800 [thread overview]
Message-ID: <20210421070059.69361-12-songmuchun@bytedance.com> (raw)
In-Reply-To: <20210421070059.69361-1-songmuchun@bytedance.com>
We need to make sure that the page is deleted from or added to the
correct lruvec list. So add a VM_BUG_ON_PAGE() to catch invalid
users.
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
---
include/linux/mm_inline.h | 6 ++++++
mm/vmscan.c | 1 -
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/include/linux/mm_inline.h b/include/linux/mm_inline.h
index 355ea1ee32bd..1ca1e2ab8565 100644
--- a/include/linux/mm_inline.h
+++ b/include/linux/mm_inline.h
@@ -84,6 +84,8 @@ static __always_inline void add_page_to_lru_list(struct page *page,
{
enum lru_list lru = page_lru(page);
+ VM_BUG_ON_PAGE(!page_matches_lruvec(page, lruvec), page);
+
update_lru_size(lruvec, lru, page_zonenum(page), thp_nr_pages(page));
list_add(&page->lru, &lruvec->lists[lru]);
}
@@ -93,6 +95,8 @@ static __always_inline void add_page_to_lru_list_tail(struct page *page,
{
enum lru_list lru = page_lru(page);
+ VM_BUG_ON_PAGE(!page_matches_lruvec(page, lruvec), page);
+
update_lru_size(lruvec, lru, page_zonenum(page), thp_nr_pages(page));
list_add_tail(&page->lru, &lruvec->lists[lru]);
}
@@ -100,6 +104,8 @@ static __always_inline void add_page_to_lru_list_tail(struct page *page,
static __always_inline void del_page_from_lru_list(struct page *page,
struct lruvec *lruvec)
{
+ VM_BUG_ON_PAGE(!page_matches_lruvec(page, lruvec), page);
+
list_del(&page->lru);
update_lru_size(lruvec, page_lru(page), page_zonenum(page),
-thp_nr_pages(page));
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 02d14a377b0e..924db107fad7 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2062,7 +2062,6 @@ static unsigned int move_pages_to_lru(struct list_head *list)
continue;
}
- VM_BUG_ON_PAGE(!page_matches_lruvec(page, lruvec), page);
add_page_to_lru_list(page, lruvec);
nr_pages = thp_nr_pages(page);
nr_moved += nr_pages;
--
2.11.0
next prev parent reply other threads:[~2021-04-21 7:02 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-21 7:00 [RFC PATCH v3 00/12] Use obj_cgroup APIs to charge the LRU pages Muchun Song
2021-04-21 7:00 ` [RFC PATCH v3 01/12] mm: memcontrol: move the objcg infrastructure out of CONFIG_MEMCG_KMEM Muchun Song
2021-05-25 16:27 ` Roman Gushchin
2021-05-26 2:46 ` [External] " Muchun Song
2021-04-21 7:00 ` [RFC PATCH v3 02/12] mm: memcontrol: introduce compact_lock_page_lruvec_irqsave Muchun Song
2021-05-25 17:21 ` Roman Gushchin
2021-05-26 2:49 ` [External] " Muchun Song
2021-04-21 7:00 ` [RFC PATCH v3 03/12] mm: memcontrol: make lruvec lock safe when the LRU pages reparented Muchun Song
2021-05-25 17:21 ` Roman Gushchin
2021-04-21 7:00 ` [RFC PATCH v3 04/12] mm: vmscan: rework move_pages_to_lru() Muchun Song
2021-04-21 7:00 ` [RFC PATCH v3 05/12] mm: thp: introduce lock/unlock_split_queue{_irqsave}() Muchun Song
2021-04-21 7:00 ` [RFC PATCH v3 06/12] mm: thp: make deferred split queue lock safe when the LRU pages reparented Muchun Song
2021-04-21 7:00 ` [RFC PATCH v3 07/12] mm: memcontrol: make all the callers of page_memcg() safe Muchun Song
2021-04-21 7:00 ` [RFC PATCH v3 08/12] mm: memcontrol: introduce memcg_reparent_ops Muchun Song
2021-05-25 17:46 ` Roman Gushchin
2021-05-26 3:01 ` [External] " Muchun Song
2021-04-21 7:00 ` [RFC PATCH v3 09/12] mm: memcontrol: use obj_cgroup APIs to charge the LRU pages Muchun Song
2021-04-21 7:00 ` [RFC PATCH v3 10/12] mm: memcontrol: rename {un}lock_page_memcg() to {un}lock_page_objcg() Muchun Song
2021-04-21 7:00 ` Muchun Song [this message]
2021-04-21 7:00 ` [RFC PATCH v3 12/12] mm: lru: use lruvec lock to serialize memcg changes Muchun Song
2021-05-18 13:49 ` [RFC PATCH v3 00/12] Use obj_cgroup APIs to charge the LRU pages Muchun Song
2021-05-18 14:17 ` Roman Gushchin
2021-05-20 3:20 ` [External] " Muchun Song
2021-05-25 17:35 ` Roman Gushchin
2021-05-26 2:41 ` Muchun Song
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