lkml.org 
[lkml]   [2020]   [Mar]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v1 6/6] mm/list_lru.c: remove kvfree_rcu_local() function
Date
Since there is newly introduced kvfree_rcu() API,
there is no need in queuing and using call_rcu()
to kvfree() an object after the GP.

Remove kvfree_rcu_local() function and replace
call_rcu() by new kvfree_rcu() API that does
the same but in more efficient way.

Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
---
mm/list_lru.c | 13 +++----------
1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/mm/list_lru.c b/mm/list_lru.c
index 386424688f80..69becdb22408 100644
--- a/mm/list_lru.c
+++ b/mm/list_lru.c
@@ -12,6 +12,7 @@
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/memcontrol.h>
+#include <linux/rcupdate.h>
#include "slab.h"

#ifdef CONFIG_MEMCG_KMEM
@@ -383,21 +384,13 @@ static void memcg_destroy_list_lru_node(struct list_lru_node *nlru)
struct list_lru_memcg *memcg_lrus;
/*
* This is called when shrinker has already been unregistered,
- * and nobody can use it. So, there is no need to use kvfree_rcu_local().
+ * and nobody can use it. So, there is no need to use kvfree_rcu().
*/
memcg_lrus = rcu_dereference_protected(nlru->memcg_lrus, true);
__memcg_destroy_list_lru_node(memcg_lrus, 0, memcg_nr_cache_ids);
kvfree(memcg_lrus);
}

-static void kvfree_rcu_local(struct rcu_head *head)
-{
- struct list_lru_memcg *mlru;
-
- mlru = container_of(head, struct list_lru_memcg, rcu);
- kvfree(mlru);
-}
-
static int memcg_update_list_lru_node(struct list_lru_node *nlru,
int old_size, int new_size)
{
@@ -429,7 +422,7 @@ static int memcg_update_list_lru_node(struct list_lru_node *nlru,
rcu_assign_pointer(nlru->memcg_lrus, new);
spin_unlock_irq(&nlru->lock);

- call_rcu(&old->rcu, kvfree_rcu_local);
+ kvfree_rcu(old, rcu);
return 0;
}

--
2.20.1
\
 
 \ /
  Last update: 2020-03-15 19:20    [W:0.081 / U:8.964 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site