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authorVladimir Davydov <vdavydov@virtuozzo.com>2015-11-05 18:49:04 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-05 19:34:48 -0800
commitdf4065516b0dbfa35ac0e9b8124d441221c0a285 (patch)
tree4b96cb7cbe15db5bb219c107904d2ed495b63a87 /mm/list_lru.c
parentf3ccb2c42297757d2e9b820ad37960462df7b7c1 (diff)
memcg: simplify and inline __mem_cgroup_from_kmem
Before the previous patch ("memcg: unify slab and other kmem pages charging"), __mem_cgroup_from_kmem had to handle two types of kmem - slab pages and pages allocated with alloc_kmem_pages - memcg in the page struct. Now we can unify it. Since after it, this function becomes tiny we can fold it into mem_cgroup_from_kmem. [hughd@google.com: move mem_cgroup_from_kmem into list_lru.c] Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/list_lru.c')
-rw-r--r--mm/list_lru.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/mm/list_lru.c b/mm/list_lru.c
index 28237476b055..afc71ea9a381 100644
--- a/mm/list_lru.c
+++ b/mm/list_lru.c
@@ -63,6 +63,16 @@ list_lru_from_memcg_idx(struct list_lru_node *nlru, int idx)
return &nlru->lru;
}
+static __always_inline struct mem_cgroup *mem_cgroup_from_kmem(void *ptr)
+{
+ struct page *page;
+
+ if (!memcg_kmem_enabled())
+ return NULL;
+ page = virt_to_head_page(ptr);
+ return page->mem_cgroup;
+}
+
static inline struct list_lru_one *
list_lru_from_kmem(struct list_lru_node *nlru, void *ptr)
{