memcg: memcg_kmem_create_cache: make memcg_name_buf statically allocated
It isn't worth complicating the code by allocating it on the first access, because it only takes 256 bytes. Signed-off-by: Vladimir Davydov <vdavydov@parallels.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
073ee1c6cd
commit
93f39eea9c
|
@ -3135,7 +3135,8 @@ void memcg_free_cache_params(struct kmem_cache *s)
|
||||||
static void memcg_kmem_create_cache(struct mem_cgroup *memcg,
|
static void memcg_kmem_create_cache(struct mem_cgroup *memcg,
|
||||||
struct kmem_cache *root_cache)
|
struct kmem_cache *root_cache)
|
||||||
{
|
{
|
||||||
static char *memcg_name_buf; /* protected by memcg_slab_mutex */
|
static char memcg_name_buf[NAME_MAX + 1]; /* protected by
|
||||||
|
memcg_slab_mutex */
|
||||||
struct kmem_cache *cachep;
|
struct kmem_cache *cachep;
|
||||||
int id;
|
int id;
|
||||||
|
|
||||||
|
@ -3151,12 +3152,6 @@ static void memcg_kmem_create_cache(struct mem_cgroup *memcg,
|
||||||
if (cache_from_memcg_idx(root_cache, id))
|
if (cache_from_memcg_idx(root_cache, id))
|
||||||
return;
|
return;
|
||||||
|
|
||||||
if (!memcg_name_buf) {
|
|
||||||
memcg_name_buf = kmalloc(NAME_MAX + 1, GFP_KERNEL);
|
|
||||||
if (!memcg_name_buf)
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
|
|
||||||
cgroup_name(memcg->css.cgroup, memcg_name_buf, NAME_MAX + 1);
|
cgroup_name(memcg->css.cgroup, memcg_name_buf, NAME_MAX + 1);
|
||||||
cachep = kmem_cache_create_memcg(memcg, root_cache, memcg_name_buf);
|
cachep = kmem_cache_create_memcg(memcg, root_cache, memcg_name_buf);
|
||||||
/*
|
/*
|
||||||
|
|
Loading…
Reference in New Issue