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From: Lu Jialin <lujialin4@huawei.com>
To: Johannes Weiner <hannes@cmpxchg.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Michal Hocko <mhocko@kernel.org>,
	Roman Gushchin <roman.gushchin@linux.dev>,
	Shakeel Butt <shakeelb@google.com>,
	Muchun Song <songmuchun@bytedance.com>
Cc: Lu Jialin <lujialin4@huawei.com>, <cgroups@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>
Subject: [PATCH] mm/memcontrol.c: drains percpu charge caches in memory.reclaim
Date: Thu, 10 Nov 2022 14:53:16 +0800	[thread overview]
Message-ID: <20221110065316.67204-1-lujialin4@huawei.com> (raw)

When user use memory.reclaim to reclaim memory, after drain percpu lru
caches, drain percpu charge caches for given memcg stock in the hope
of introducing more evictable pages.

Signed-off-by: Lu Jialin <lujialin4@huawei.com>
---
 mm/memcontrol.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 2d8549ae1b30..768091cc6a9a 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -6593,10 +6593,13 @@ static ssize_t memory_reclaim(struct kernfs_open_file *of, char *buf,
 		/*
 		 * This is the final attempt, drain percpu lru caches in the
 		 * hope of introducing more evictable pages for
-		 * try_to_free_mem_cgroup_pages().
+		 * try_to_free_mem_cgroup_pages(). Also, drain all percpu
+		 * charge caches for given memcg.
 		 */
-		if (!nr_retries)
+		if (!nr_retries) {
 			lru_add_drain_all();
+			drain_all_stock(memcg);
+		}
 
 		reclaimed = try_to_free_mem_cgroup_pages(memcg,
 						nr_to_reclaim - nr_reclaimed,
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: Lu Jialin <lujialin4-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
To: Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>,
	Andrew Morton
	<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
	Michal Hocko <mhocko-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Roman Gushchin
	<roman.gushchin-fxUVXftIFDnyG1zEObXtfA@public.gmane.org>,
	Shakeel Butt <shakeelb-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
	Muchun Song <songmuchun-EC8Uxl6Npydl57MIdRCFDg@public.gmane.org>
Cc: Lu Jialin <lujialin4-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>,
	cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org
Subject: [PATCH] mm/memcontrol.c: drains percpu charge caches in memory.reclaim
Date: Thu, 10 Nov 2022 14:53:16 +0800	[thread overview]
Message-ID: <20221110065316.67204-1-lujialin4@huawei.com> (raw)

When user use memory.reclaim to reclaim memory, after drain percpu lru
caches, drain percpu charge caches for given memcg stock in the hope
of introducing more evictable pages.

Signed-off-by: Lu Jialin <lujialin4-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
---
 mm/memcontrol.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 2d8549ae1b30..768091cc6a9a 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -6593,10 +6593,13 @@ static ssize_t memory_reclaim(struct kernfs_open_file *of, char *buf,
 		/*
 		 * This is the final attempt, drain percpu lru caches in the
 		 * hope of introducing more evictable pages for
-		 * try_to_free_mem_cgroup_pages().
+		 * try_to_free_mem_cgroup_pages(). Also, drain all percpu
+		 * charge caches for given memcg.
 		 */
-		if (!nr_retries)
+		if (!nr_retries) {
 			lru_add_drain_all();
+			drain_all_stock(memcg);
+		}
 
 		reclaimed = try_to_free_mem_cgroup_pages(memcg,
 						nr_to_reclaim - nr_reclaimed,
-- 
2.17.1


             reply	other threads:[~2022-11-10  6:57 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-10  6:53 Lu Jialin [this message]
2022-11-10  6:53 ` [PATCH] mm/memcontrol.c: drains percpu charge caches in memory.reclaim Lu Jialin
2022-11-10 14:42 ` Michal Koutný
2022-11-10 14:42   ` Michal Koutný
2022-11-10 19:35   ` Yosry Ahmed
2022-11-10 19:35     ` Yosry Ahmed
2022-11-10 19:45     ` Yosry Ahmed
2022-11-10 19:45       ` Yosry Ahmed
2022-11-11 10:08     ` Michal Koutný
2022-11-11 10:08       ` Michal Koutný
2022-11-11 18:24       ` Yosry Ahmed
2022-11-11 18:24         ` Yosry Ahmed
2022-11-11 20:31         ` Johannes Weiner
2022-11-11 20:31           ` Johannes Weiner

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