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mm: memcontrol: report slab usage in cgroup2 memory.stat

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Show how much memory is used for storing reclaimable and unreclaimable
in-kernel data structures allocated from slab caches.

Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Vladimir Davydov
2016-03-17 14:17:35 -07:00
committed by Linus Torvalds
parent 72b54e7314
commit 27ee57c93f
6 changed files with 79 additions and 6 deletions
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21
include/linux/memcontrol.h
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@@ -53,6 +53,8 @@ enum mem_cgroup_stat_index {
MEM_CGROUP_STAT_NSTATS,
/* default hierarchy stats */
MEMCG_SOCK = MEM_CGROUP_STAT_NSTATS,
MEMCG_SLAB_RECLAIMABLE,
MEMCG_SLAB_UNRECLAIMABLE,
MEMCG_NR_STAT,
};
@@ -883,6 +885,20 @@ static __always_inline void memcg_kmem_put_cache(struct kmem_cache *cachep)
if (memcg_kmem_enabled())
__memcg_kmem_put_cache(cachep);
}
/**
* memcg_kmem_update_page_stat - update kmem page state statistics
* @page: the page
* @idx: page state item to account
* @val: number of pages (positive or negative)
*/
static inline void memcg_kmem_update_page_stat(struct page *page,
enum mem_cgroup_stat_index idx, int val)
{
if (memcg_kmem_enabled() && page->mem_cgroup)
this_cpu_add(page->mem_cgroup->stat->count[idx], val);
}
#else
#define for_each_memcg_cache_index(_idx) \
for (; NULL; )
@@ -928,6 +944,11 @@ memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
static inline void memcg_kmem_put_cache(struct kmem_cache *cachep)
{
}
static inline void memcg_kmem_update_page_stat(struct page *page,
enum mem_cgroup_stat_index idx, int val)
{
}
#endif /* CONFIG_MEMCG && !CONFIG_SLOB */
#endif /* _LINUX_MEMCONTROL_H */