The patch titled
Subject: mm-make-count-list_lru_one-nr_items-lockless-v2
has been added to the -mm tree. Its filename is
mm-make-count-list_lru_one-nr_items-lockless-v2.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-make-count-list_lru_one-nr_items-lockless-v2.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-make-count-list_lru_one-nr_items-lockless-v2.patch
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------------------------------------------------------
From: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
Subject: mm-make-count-list_lru_one-nr_items-lockless-v2
v2: Rebase on kvmalloc() and kvfree(). Name of kvfree_rcu() was choosen
to help not to skip this place, when someone will implement such the
global interface.
Link: http://lkml.kernel.org/r/151203869520.3915.2587549826865799173.stgit@localhost.localdomain
Signed-off-by: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/list_lru.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff -puN mm/list_lru.c~mm-make-count-list_lru_one-nr_items-lockless-v2 mm/list_lru.c
--- a/mm/list_lru.c~mm-make-count-list_lru_one-nr_items-lockless-v2
+++ a/mm/list_lru.c
@@ -336,7 +336,7 @@ static int memcg_init_list_lru_node(stru
int size = memcg_nr_cache_ids;
memcg_lrus = kvmalloc(sizeof(*memcg_lrus) +
- size * sizeof(void *), GFP_KERNEL);
+ size * sizeof(void *), GFP_KERNEL);
if (!memcg_lrus)
return -ENOMEM;
@@ -354,13 +354,21 @@ static void memcg_destroy_list_lru_node(
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 kfree_rcu().
+ * 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(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)
{
@@ -392,7 +400,7 @@ static int memcg_update_list_lru_node(st
rcu_assign_pointer(nlru->memcg_lrus, new);
spin_unlock_irq(&nlru->lock);
- kfree_rcu(old, rcu);
+ call_rcu(&old->rcu, kvfree_rcu);
return 0;
}
_
Patches currently in -mm which might be from ktkhai@xxxxxxxxxxxxx are
mm-make-count-list_lru_one-nr_items-lockless.patch
mm-make-count-list_lru_one-nr_items-lockless-v2.patch
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