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,
Muchun Song <songmuchun@bytedance.com>,
Michal Hocko <mhocko@suse.com>
Subject: [PATCH v3 5/8] mm: memcontrol: rename lruvec_holds_page_lru_lock to page_matches_lruvec
Date: Sat, 17 Apr 2021 12:35:35 +0800 [thread overview]
Message-ID: <20210417043538.9793-6-songmuchun@bytedance.com> (raw)
In-Reply-To: <20210417043538.9793-1-songmuchun@bytedance.com>
lruvec_holds_page_lru_lock() doesn't check anything about locking and is
used to check whether the page belongs to the lruvec. So rename it to
page_matches_lruvec().
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
---
include/linux/memcontrol.h | 8 ++++----
mm/vmscan.c | 2 +-
2 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 2fc728492c9b..0ce97eff79e2 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -1492,8 +1492,8 @@ static inline void unlock_page_lruvec_irqrestore(struct lruvec *lruvec,
spin_unlock_irqrestore(&lruvec->lru_lock, flags);
}
-static inline bool lruvec_holds_page_lru_lock(struct page *page,
- struct lruvec *lruvec)
+/* Test requires a stable page->memcg binding, see page_memcg() */
+static inline bool page_matches_lruvec(struct page *page, struct lruvec *lruvec)
{
return lruvec_pgdat(lruvec) == page_pgdat(page) &&
lruvec_memcg(lruvec) == page_memcg(page);
@@ -1504,7 +1504,7 @@ static inline struct lruvec *relock_page_lruvec_irq(struct page *page,
struct lruvec *locked_lruvec)
{
if (locked_lruvec) {
- if (lruvec_holds_page_lru_lock(page, locked_lruvec))
+ if (page_matches_lruvec(page, locked_lruvec))
return locked_lruvec;
unlock_page_lruvec_irq(locked_lruvec);
@@ -1518,7 +1518,7 @@ static inline struct lruvec *relock_page_lruvec_irqsave(struct page *page,
struct lruvec *locked_lruvec, unsigned long *flags)
{
if (locked_lruvec) {
- if (lruvec_holds_page_lru_lock(page, locked_lruvec))
+ if (page_matches_lruvec(page, locked_lruvec))
return locked_lruvec;
unlock_page_lruvec_irqrestore(locked_lruvec, *flags);
diff --git a/mm/vmscan.c b/mm/vmscan.c
index bb8321026c0c..2bc5cf409958 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2062,7 +2062,7 @@ static unsigned noinline_for_stack move_pages_to_lru(struct lruvec *lruvec,
* All pages were isolated from the same lruvec (and isolation
* inhibits memcg migration).
*/
- VM_BUG_ON_PAGE(!lruvec_holds_page_lru_lock(page, lruvec), page);
+ 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:[~2021-04-17 4:38 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-17 4:35 [PATCH v3 0/8] memcontrol code cleanup and simplification Muchun Song
2021-04-17 4:35 ` [PATCH v3 1/8] mm: memcontrol: fix page charging in page replacement Muchun Song
2021-04-17 4:35 ` [PATCH v3 2/8] mm: memcontrol: bail out early when !mm in get_mem_cgroup_from_mm Muchun Song
2021-04-17 4:35 ` [PATCH v3 3/8] mm: memcontrol: remove the pgdata parameter of mem_cgroup_page_lruvec Muchun Song
2021-04-17 4:35 ` [PATCH v3 4/8] mm: memcontrol: simplify lruvec_holds_page_lru_lock Muchun Song
2021-04-17 4:35 ` Muchun Song [this message]
2021-04-17 4:35 ` [PATCH v3 6/8] mm: memcontrol: simplify the logic of objcg pinning memcg Muchun Song
2021-04-17 4:35 ` [PATCH v3 7/8] mm: memcontrol: move obj_cgroup_uncharge_pages() out of css_set_lock Muchun Song
2021-04-17 4:35 ` [PATCH v3 8/8] mm: vmscan: remove noinline_for_stack Muchun Song
2021-04-26 7:49 ` [PATCH v3 0/8] memcontrol code cleanup and simplification Muchun Song
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