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-rw-r--r--mm/slab_common.c35
1 files changed, 33 insertions, 2 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 2834bc2886fd..2dd920dc3776 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -205,6 +205,8 @@ kmem_cache_create(const char *name, size_t size, size_t align,
int err;
get_online_cpus();
+ get_online_mems();
+
mutex_lock(&slab_mutex);
err = kmem_cache_sanity_check(name, size);
@@ -239,6 +241,8 @@ kmem_cache_create(const char *name, size_t size, size_t align,
out_unlock:
mutex_unlock(&slab_mutex);
+
+ put_online_mems();
put_online_cpus();
if (err) {
@@ -272,6 +276,8 @@ void kmem_cache_create_memcg(struct mem_cgroup *memcg, struct kmem_cache *root_c
char *cache_name;
get_online_cpus();
+ get_online_mems();
+
mutex_lock(&slab_mutex);
/*
@@ -295,6 +301,8 @@ void kmem_cache_create_memcg(struct mem_cgroup *memcg, struct kmem_cache *root_c
out_unlock:
mutex_unlock(&slab_mutex);
+
+ put_online_mems();
put_online_cpus();
}
@@ -328,6 +336,8 @@ void slab_kmem_cache_release(struct kmem_cache *s)
void kmem_cache_destroy(struct kmem_cache *s)
{
get_online_cpus();
+ get_online_mems();
+
mutex_lock(&slab_mutex);
s->refcount--;
@@ -359,15 +369,36 @@ void kmem_cache_destroy(struct kmem_cache *s)
#else
slab_kmem_cache_release(s);
#endif
- goto out_put_cpus;
+ goto out;
out_unlock:
mutex_unlock(&slab_mutex);
-out_put_cpus:
+out:
+ put_online_mems();
put_online_cpus();
}
EXPORT_SYMBOL(kmem_cache_destroy);
+/**
+ * kmem_cache_shrink - Shrink a cache.
+ * @cachep: The cache to shrink.
+ *
+ * Releases as many slabs as possible for a cache.
+ * To help debugging, a zero exit status indicates all slabs were released.
+ */
+int kmem_cache_shrink(struct kmem_cache *cachep)
+{
+ int ret;
+
+ get_online_cpus();
+ get_online_mems();
+ ret = __kmem_cache_shrink(cachep);
+ put_online_mems();
+ put_online_cpus();
+ return ret;
+}
+EXPORT_SYMBOL(kmem_cache_shrink);
+
int slab_is_available(void)
{
return slab_state >= UP;