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 <[email protected]> Acked-by: Johannes Weiner <[email protected]> --- include/linux/memcontrol.h | 4 ++-- mm/memcontrol.c | 22 ++++++++++++++++++++-- mm/slab.c | 2 -- mm/slab.h | 25 ++----------------------- mm/slub.c | 2 -- 5 files changed, 24 insertions(+), 31 deletions(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 087a45314181..d38d190f4cec 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -506,8 +506,8 @@ void memcg_update_array_size(int num_groups); struct kmem_cache * __memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp); -int memcg_charge_kmem(struct mem_cgroup *memcg, gfp_t gfp, u64 size); -void memcg_uncharge_kmem(struct mem_cgroup *memcg, u64 size); +int __memcg_charge_slab(struct kmem_cache *cachep, gfp_t gfp, int order); +void __memcg_uncharge_slab(struct kmem_cache *cachep, int order); int __kmem_cache_destroy_memcg_children(struct kmem_cache *s); diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 4c9b0cbd06ed..73fe4db2cecd 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2951,7 +2951,7 @@ 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; @@ -2989,7 +2989,7 @@ 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) @@ -3387,6 +3387,24 @@ 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. diff --git a/mm/slab.c b/mm/slab.c index bae9c32d4c8e..3e152b28f27a 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -1706,7 +1706,6 @@ static struct page *kmem_getpages(struct kmem_cache *cachep, gfp_t flags, __SetPageSlab(page); if (page->pfmemalloc) SetPageSlabPfmemalloc(page); - memcg_bind_pages(cachep, cachep->gfporder); if (kmemcheck_enabled && !(cachep->flags & SLAB_NOTRACK)) { kmemcheck_alloc_shadow(page, cachep->gfporder, flags, nodeid); @@ -1742,7 +1741,6 @@ static void kmem_freepages(struct kmem_cache *cachep, struct page *page) page_mapcount_reset(page); page->mapping = NULL; - memcg_release_pages(cachep, cachep->gfporder); if (current->reclaim_state) current->reclaim_state->reclaimed_slab += nr_freed; __free_pages(page, cachep->gfporder); diff --git a/mm/slab.h b/mm/slab.h index b60c0a30f75f..ba834860fbfd 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -120,18 +120,6 @@ static inline bool is_root_cache(struct kmem_cache *s) return !s->memcg_params || s->memcg_params->is_root_cache; } -static inline void memcg_bind_pages(struct kmem_cache *s, int order) -{ - if (!is_root_cache(s)) - atomic_add(1 << order, &s->memcg_params->nr_pages); -} - -static inline void memcg_release_pages(struct kmem_cache *s, int order) -{ - if (!is_root_cache(s)) - atomic_sub(1 << order, &s->memcg_params->nr_pages); -} - static inline bool slab_equal_or_root(struct kmem_cache *s, struct kmem_cache *p) { @@ -197,8 +185,7 @@ static __always_inline int memcg_charge_slab(struct kmem_cache *s, return 0; if (is_root_cache(s)) return 0; - return memcg_charge_kmem(s->memcg_params->memcg, gfp, - PAGE_SIZE << order); + return __memcg_charge_slab(s, gfp, order); } static __always_inline void memcg_uncharge_slab(struct kmem_cache *s, int order) @@ -207,7 +194,7 @@ static __always_inline void memcg_uncharge_slab(struct kmem_cache *s, int order) return; if (is_root_cache(s)) return; - memcg_uncharge_kmem(s->memcg_params->memcg, PAGE_SIZE << order); + __memcg_uncharge_slab(s, order); } #else static inline bool is_root_cache(struct kmem_cache *s) @@ -215,14 +202,6 @@ static inline bool is_root_cache(struct kmem_cache *s) return true; } -static inline void memcg_bind_pages(struct kmem_cache *s, int order) -{ -} - -static inline void memcg_release_pages(struct kmem_cache *s, int order) -{ -} - static inline bool slab_equal_or_root(struct kmem_cache *s, struct kmem_cache *p) { diff --git a/mm/slub.c b/mm/slub.c index 521167b1a96a..aa30932c5190 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1427,7 +1427,6 @@ static struct page *new_slab(struct kmem_cache *s, gfp_t flags, int node) order = compound_order(page); inc_slabs_node(s, page_to_nid(page), page->objects); - memcg_bind_pages(s, order); page->slab_cache = s; __SetPageSlab(page); if (page->pfmemalloc) @@ -1478,7 +1477,6 @@ static void __free_slab(struct kmem_cache *s, struct page *page) __ClearPageSlabPfmemalloc(page); __ClearPageSlab(page); - memcg_release_pages(s, order); page_mapcount_reset(page); if (current->reclaim_state) current->reclaim_state->reclaimed_slab += pages; -- 1.7.10.4 _______________________________________________ Devel mailing list [email protected] https://lists.openvz.org/mailman/listinfo/devel
