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authorVladimir Davydov <vdavydov@parallels.com>2014-06-04 16:07:39 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-04 16:54:01 -0700
commitc67a8a685a6e9abbaf0235e084168f15a721ae39 (patch)
tree946c9890d1638aa5540b596beefc305ad5dc26d0 /mm/memcontrol.c
parent1e32e77f95d60b121b6072e3e3a650a7f93068f9 (diff)
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memcg, slab: merge memcg_{bind,release}_pages to memcg_{un}charge_slab
Currently we have two pairs of kmemcg-related functions that are called on slab alloc/free. The first is memcg_{bind,release}_pages that count the total number of pages allocated on a kmem cache. The second is memcg_{un}charge_slab that {un}charge slab pages to kmemcg resource counter. Let's just merge them to keep the code clean. Signed-off-by: Vladimir Davydov <vdavydov@parallels.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Glauber Costa <glommer@gmail.com> Cc: Pekka Enberg <penberg@kernel.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.c22
1 files changed, 20 insertions, 2 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 6b1c45c..86a2078 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2954,7 +2954,7 @@ static int mem_cgroup_slabinfo_read(struct seq_file *m, void *v)
}
#endif
-int memcg_charge_kmem(struct mem_cgroup *memcg, gfp_t gfp, u64 size)
+static int memcg_charge_kmem(struct mem_cgroup *memcg, gfp_t gfp, u64 size)
{
struct res_counter *fail_res;
int ret = 0;
@@ -2992,7 +2992,7 @@ int memcg_charge_kmem(struct mem_cgroup *memcg, gfp_t gfp, u64 size)
return ret;
}
-void memcg_uncharge_kmem(struct mem_cgroup *memcg, u64 size)
+static void memcg_uncharge_kmem(struct mem_cgroup *memcg, u64 size)
{
res_counter_uncharge(&memcg->res, size);
if (do_swap_account)
@@ -3390,6 +3390,24 @@ static void memcg_create_cache_enqueue(struct mem_cgroup *memcg,
__memcg_create_cache_enqueue(memcg, cachep);
memcg_resume_kmem_account();
}
+
+int __memcg_charge_slab(struct kmem_cache *cachep, gfp_t gfp, int order)
+{
+ int res;
+
+ res = memcg_charge_kmem(cachep->memcg_params->memcg, gfp,
+ PAGE_SIZE << order);
+ if (!res)
+ atomic_add(1 << order, &cachep->memcg_params->nr_pages);
+ return res;
+}
+
+void __memcg_uncharge_slab(struct kmem_cache *cachep, int order)
+{
+ memcg_uncharge_kmem(cachep->memcg_params->memcg, PAGE_SIZE << order);
+ atomic_sub(1 << order, &cachep->memcg_params->nr_pages);
+}
+
/*
* Return the kmem_cache we're supposed to use for a slab allocation.
* We try to use the current memcg's version of the cache.
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