linux-kernel - [PATCH v3 2/8] memcg: rename mem_cgroup_flush_stats

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Date:   Thu, 30 Mar 2023 19:17:55 +0000
From:   Yosry Ahmed <yosryahmed@...gle.com>
To:     Tejun Heo <tj@...nel.org>, Josef Bacik <josef@...icpanda.com>,
        Jens Axboe <axboe@...nel.dk>,
        Zefan Li <lizefan.x@...edance.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Shakeel Butt <shakeelb@...gle.com>,
        Muchun Song <muchun.song@...ux.dev>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Michal Koutný" <mkoutny@...e.com>
Cc:     Vasily Averin <vasily.averin@...ux.dev>, cgroups@...r.kernel.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, bpf@...r.kernel.org,
        Yosry Ahmed <yosryahmed@...gle.com>,
        Michal Hocko <mhocko@...e.com>
Subject: [PATCH v3 2/8] memcg: rename mem_cgroup_flush_stats_"delayed" to "ratelimited"

mem_cgroup_flush_stats_delayed() suggests his is using a delayed_work,
but this is actually sometimes flushing directly from the callsite.

What it's doing is ratelimited calls. A better name would be
mem_cgroup_flush_stats_ratelimited().

Suggested-by: Johannes Weiner <hannes@...xchg.org>
Signed-off-by: Yosry Ahmed <yosryahmed@...gle.com>
Acked-by: Shakeel Butt <shakeelb@...gle.com>
Acked-by: Johannes Weiner <hannes@...xchg.org>
Acked-by: Michal Hocko <mhocko@...e.com>
---
 include/linux/memcontrol.h | 4 ++--
 mm/memcontrol.c            | 2 +-
 mm/workingset.c            | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index b6eda2ab205d..ac3f3b3a45e2 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -1037,7 +1037,7 @@ static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec,
 }
 
 void mem_cgroup_flush_stats(void);
-void mem_cgroup_flush_stats_delayed(void);
+void mem_cgroup_flush_stats_ratelimited(void);
 
 void __mod_memcg_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx,
 			      int val);
@@ -1535,7 +1535,7 @@ static inline void mem_cgroup_flush_stats(void)
 {
 }
 
-static inline void mem_cgroup_flush_stats_delayed(void)
+static inline void mem_cgroup_flush_stats_ratelimited(void)
 {
 }
 
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 0205e58ea430..c3b6aae78901 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -653,7 +653,7 @@ void mem_cgroup_flush_stats(void)
 		__mem_cgroup_flush_stats();
 }
 
-void mem_cgroup_flush_stats_delayed(void)
+void mem_cgroup_flush_stats_ratelimited(void)
 {
 	if (time_after64(jiffies_64, flush_next_time))
 		mem_cgroup_flush_stats();
diff --git a/mm/workingset.c b/mm/workingset.c
index 00c6f4d9d9be..af862c6738c3 100644
--- a/mm/workingset.c
+++ b/mm/workingset.c
@@ -462,7 +462,7 @@ void workingset_refault(struct folio *folio, void *shadow)
 
 	mod_lruvec_state(lruvec, WORKINGSET_REFAULT_BASE + file, nr);
 
-	mem_cgroup_flush_stats_delayed();
+	mem_cgroup_flush_stats_ratelimited();
 	/*
 	 * Compare the distance to the existing workingset size. We
 	 * don't activate pages that couldn't stay resident even if
-- 
2.40.0.348.gf938b09366-goog