From: Vladimir Davydov Date: Wed, 4 Jun 2014 23:08:24 +0000 (-0700) Subject: memcg: memcg_kmem_create_cache: make memcg_name_buf statically allocated X-Git-Tag: Ubuntu-5.0.0-8.9~11397^2~16^2~141 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=93f39eea9c229778361ae7ecf5f5e95d291757da;p=mirror_ubuntu-disco-kernel.git 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 Cc: Michal Hocko Cc: Johannes Weiner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 7df7f599e3df..5e2bfcc96da9 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3135,7 +3135,8 @@ void memcg_free_cache_params(struct kmem_cache *s) static void memcg_kmem_create_cache(struct mem_cgroup *memcg, 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; int id; @@ -3151,12 +3152,6 @@ static void memcg_kmem_create_cache(struct mem_cgroup *memcg, if (cache_from_memcg_idx(root_cache, id)) 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); cachep = kmem_cache_create_memcg(memcg, root_cache, memcg_name_buf); /*