xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

memcg: localize memcg_kmem_enabled() check

Browse Source 
Move the memcg_kmem_enabled() checks into memcg kmem charge/uncharge
functions, so, the users don't have to explicitly check that condition.

This is purely code cleanup patch without any functional change.  Only
the order of checks in memcg_charge_slab() can potentially be changed
but the functionally it will be same.  This should not matter as
memcg_charge_slab() is not in the hot path.

Link: http://lkml.kernel.org/r/20190103161203.162375-1-shakeelb@google.com
Signed-off-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Roman Gushchin <guro@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Shakeel Butt
2019-03-05 15:43:13 -08:00
committed by Linus Torvalds
parent 9234bae9b2
commit 60cd4bcd62
5 changed files with 44 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
include/linux/memcontrol.h
View File

@@ -1273,12 +1273,12 @@ static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep);
void memcg_kmem_put_cache(struct kmem_cache *cachep);
int memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order,
struct mem_cgroup *memcg);
#ifdef CONFIG_MEMCG_KMEM
int memcg_kmem_charge(struct page *page, gfp_t gfp, int order);
void memcg_kmem_uncharge(struct page *page, int order);
int __memcg_kmem_charge(struct page *page, gfp_t gfp, int order);
void __memcg_kmem_uncharge(struct page *page, int order);
int __memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order,
struct mem_cgroup *memcg);
extern struct static_key_false memcg_kmem_enabled_key;
extern struct workqueue_struct *memcg_kmem_cache_wq;
@@ -1300,6 +1300,26 @@ static inline bool memcg_kmem_enabled(void)
return static_branch_unlikely(&memcg_kmem_enabled_key);
}
static inline int memcg_kmem_charge(struct page *page, gfp_t gfp, int order)
{
if (memcg_kmem_enabled())
return __memcg_kmem_charge(page, gfp, order);
return 0;
}
static inline void memcg_kmem_uncharge(struct page *page, int order)
{
if (memcg_kmem_enabled())
__memcg_kmem_uncharge(page, order);
}
static inline int memcg_kmem_charge_memcg(struct page *page, gfp_t gfp,
int order, struct mem_cgroup *memcg)
{
if (memcg_kmem_enabled())
return __memcg_kmem_charge_memcg(page, gfp, order, memcg);
return 0;
}
/*
* helper for accessing a memcg's index. It will be used as an index in the
* child cache array in kmem_cache, and also to derive its name. This function
@@ -1325,6 +1345,15 @@ static inline void memcg_kmem_uncharge(struct page *page, int order)
{
}
static inline int __memcg_kmem_charge(struct page *page, gfp_t gfp, int order)
{
return 0;
}
static inline void __memcg_kmem_uncharge(struct page *page, int order)
{
}
#define for_each_memcg_cache_index(_idx) \
for (; NULL; )