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Message-Id: <20210311190845.9708-6-shy828301@gmail.com>
Date: Thu, 11 Mar 2021 11:08:37 -0800
From: Yang Shi <shy828301@...il.com>
To: guro@...com, ktkhai@...tuozzo.com, vbabka@...e.cz,
shakeelb@...gle.com, david@...morbit.com, hannes@...xchg.org,
mhocko@...e.com, akpm@...ux-foundation.org
Cc: shy828301@...il.com, linux-mm@...ck.org,
linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [v10 PATCH 05/13] mm: vmscan: use kvfree_rcu instead of call_rcu
Using kvfree_rcu() to free the old shrinker_maps instead of call_rcu().
We don't have to define a dedicated callback for call_rcu() anymore.
Acked-by: Roman Gushchin <guro@...com>
Acked-by: Kirill Tkhai <ktkhai@...tuozzo.com>
Reviewed-by: Shakeel Butt <shakeelb@...gle.com>
Signed-off-by: Yang Shi <shy828301@...il.com>
---
mm/vmscan.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 641a0b8b4ea9..bbe13985ae05 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -192,11 +192,6 @@ static inline int shrinker_map_size(int nr_items)
return (DIV_ROUND_UP(nr_items, BITS_PER_LONG) * sizeof(unsigned long));
}
-static void free_shrinker_map_rcu(struct rcu_head *head)
-{
- kvfree(container_of(head, struct memcg_shrinker_map, rcu));
-}
-
static int expand_one_shrinker_map(struct mem_cgroup *memcg,
int size, int old_size)
{
@@ -220,7 +215,7 @@ static int expand_one_shrinker_map(struct mem_cgroup *memcg,
memset((void *)new->map + old_size, 0, size - old_size);
rcu_assign_pointer(pn->shrinker_map, new);
- call_rcu(&old->rcu, free_shrinker_map_rcu);
+ kvfree_rcu(old, rcu);
}
return 0;
--
2.26.2
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