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| author | Vladimir Davydov <vdavydov@parallels.com> | 2014-06-04 16:08:24 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-04 16:54:06 -0700 |
| commit | 93f39eea9c229778361ae7ecf5f5e95d291757da (patch) | |
| tree | 5f4ea6696209c424e58f1a4e7b6f1a695248a9ee /mm/memcontrol.c | |
| parent | 073ee1c6cd11cd190f4d0da84d9b4ba79d7b9e70 (diff) | |
| download | lwn-93f39eea9c229778361ae7ecf5f5e95d291757da.tar.gz lwn-93f39eea9c229778361ae7ecf5f5e95d291757da.zip | |
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>
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 9 |
1 files changed, 2 insertions, 7 deletions
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); /* |