The patch titled
Subject: memcg: simplify and inline __mem_cgroup_from_kmem
has been added to the -mm tree. Its filename is
memcg-simplify-and-inline-__mem_cgroup_from_kmem.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/memcg-simplify-and-inline-__mem_cgroup_from_kmem.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/memcg-simplify-and-inline-__mem_cgroup_from_kmem.patch
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------------------------------------------------------
From: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Subject: 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.
Signed-off-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/memcontrol.h | 7 ++++---
mm/memcontrol.c | 18 ------------------
2 files changed, 4 insertions(+), 21 deletions(-)
diff -puN include/linux/memcontrol.h~memcg-simplify-and-inline-__mem_cgroup_from_kmem include/linux/memcontrol.h
--- a/include/linux/memcontrol.h~memcg-simplify-and-inline-__mem_cgroup_from_kmem
+++ a/include/linux/memcontrol.h
@@ -767,8 +767,6 @@ static inline int memcg_cache_id(struct
struct kmem_cache *__memcg_kmem_get_cache(struct kmem_cache *cachep);
void __memcg_kmem_put_cache(struct kmem_cache *cachep);
-struct mem_cgroup *__mem_cgroup_from_kmem(void *ptr);
-
static inline bool __memcg_kmem_bypass(gfp_t gfp)
{
if (!memcg_kmem_enabled())
@@ -830,9 +828,12 @@ static __always_inline void memcg_kmem_p
static __always_inline struct mem_cgroup *mem_cgroup_from_kmem(void *ptr)
{
+ struct page *page;
+
if (!memcg_kmem_enabled())
return NULL;
- return __mem_cgroup_from_kmem(ptr);
+ page = virt_to_head_page(ptr);
+ return page->mem_cgroup;
}
#else
#define for_each_memcg_cache_index(_idx) \
diff -puN mm/memcontrol.c~memcg-simplify-and-inline-__mem_cgroup_from_kmem mm/memcontrol.c
--- a/mm/memcontrol.c~memcg-simplify-and-inline-__mem_cgroup_from_kmem
+++ a/mm/memcontrol.c
@@ -2430,24 +2430,6 @@ void __memcg_kmem_uncharge(struct page *
page->mem_cgroup = NULL;
css_put_many(&memcg->css, nr_pages);
}
-
-struct mem_cgroup *__mem_cgroup_from_kmem(void *ptr)
-{
- struct mem_cgroup *memcg = NULL;
- struct kmem_cache *cachep;
- struct page *page;
-
- page = virt_to_head_page(ptr);
- if (PageSlab(page)) {
- cachep = page->slab_cache;
- if (!is_root_cache(cachep))
- memcg = cachep->memcg_params.memcg;
- } else
- /* page allocated by alloc_kmem_pages */
- memcg = page->mem_cgroup;
-
- return memcg;
-}
#endif /* CONFIG_MEMCG_KMEM */
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
_
Patches currently in -mm which might be from vdavydov@xxxxxxxxxxxxx are
slab_common-rename-cache-create-destroy-helpers.patch
slab_common-clear-pointers-to-per-memcg-caches-on-destroy.patch
slab_common-do-not-warn-that-cache-is-busy-on-destroy-more-than-once.patch
memcg-simplify-charging-kmem-pages.patch
memcg-unify-slab-and-other-kmem-pages-charging.patch
memcg-simplify-and-inline-__mem_cgroup_from_kmem.patch
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