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| author | Vladimir Davydov <vdavydov@parallels.com> | 2015-02-11 01:11:44 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-11 01:30:34 +0300 |
| commit | 3e0350a36414a73c5c2d1e354f8c0ab4ace1296d (patch) | |
| tree | 70d8c13dd7f32f684f0f3653fe5616c43b8726b5 | |
| parent | dbf22eb6d8675fc173154d9f1bd1bd0fda53a001 (diff) | |
| download | linux-3e0350a36414a73c5c2d1e354f8c0ab4ace1296d.tar.xz | |
memcg: zap memcg_name argument of memcg_create_kmem_cache
Instead of passing the name of the memory cgroup which the cache is
created for in the memcg_name_argument, let's obtain it immediately in
memcg_create_kmem_cache.
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/slab.h | 3 | ||||
| -rw-r--r-- | mm/memcontrol.c | 5 | ||||
| -rw-r--r-- | mm/slab_common.c | 9 |
3 files changed, 7 insertions, 10 deletions
diff --git a/include/linux/slab.h b/include/linux/slab.h index 9a139b637069..eca9ed303a1b 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -117,8 +117,7 @@ struct kmem_cache *kmem_cache_create(const char *, size_t, size_t, void (*)(void *)); #ifdef CONFIG_MEMCG_KMEM struct kmem_cache *memcg_create_kmem_cache(struct mem_cgroup *, - struct kmem_cache *, - const char *); + struct kmem_cache *); #endif void kmem_cache_destroy(struct kmem_cache *); int kmem_cache_shrink(struct kmem_cache *); diff --git a/mm/memcontrol.c b/mm/memcontrol.c index e229e3ad615c..baf7eb27e3ae 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2607,8 +2607,6 @@ void memcg_update_array_size(int num) static void memcg_register_cache(struct mem_cgroup *memcg, struct kmem_cache *root_cache) { - static char memcg_name_buf[NAME_MAX + 1]; /* protected by - memcg_slab_mutex */ struct kmem_cache *cachep; int id; @@ -2624,8 +2622,7 @@ static void memcg_register_cache(struct mem_cgroup *memcg, if (cache_from_memcg_idx(root_cache, id)) return; - cgroup_name(memcg->css.cgroup, memcg_name_buf, NAME_MAX + 1); - cachep = memcg_create_kmem_cache(memcg, root_cache, memcg_name_buf); + cachep = memcg_create_kmem_cache(memcg, root_cache); /* * If we could not create a memcg cache, do not complain, because * that's not critical at all as we can always proceed with the root diff --git a/mm/slab_common.c b/mm/slab_common.c index 67f182c10f24..1b782a2d3b3d 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -430,16 +430,15 @@ EXPORT_SYMBOL(kmem_cache_create); * memcg_create_kmem_cache - Create a cache for a memory cgroup. * @memcg: The memory cgroup the new cache is for. * @root_cache: The parent of the new cache. - * @memcg_name: The name of the memory cgroup (used for naming the new cache). * * This function attempts to create a kmem cache that will serve allocation * requests going from @memcg to @root_cache. The new cache inherits properties * from its parent. */ struct kmem_cache *memcg_create_kmem_cache(struct mem_cgroup *memcg, - struct kmem_cache *root_cache, - const char *memcg_name) + struct kmem_cache *root_cache) { + static char memcg_name_buf[NAME_MAX + 1]; /* protected by slab_mutex */ struct kmem_cache *s = NULL; char *cache_name; @@ -448,8 +447,10 @@ struct kmem_cache *memcg_create_kmem_cache(struct mem_cgroup *memcg, mutex_lock(&slab_mutex); + cgroup_name(mem_cgroup_css(memcg)->cgroup, + memcg_name_buf, sizeof(memcg_name_buf)); cache_name = kasprintf(GFP_KERNEL, "%s(%d:%s)", root_cache->name, - memcg_cache_id(memcg), memcg_name); + memcg_cache_id(memcg), memcg_name_buf); if (!cache_name) goto out_unlock; |