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Date: Fri, 6 Jun 2014 17:22:40 +0400 From: Vladimir Davydov <vdavydov@...allels.com> To: <akpm@...ux-foundation.org> CC: <cl@...ux.com>, <iamjoonsoo.kim@....com>, <rientjes@...gle.com>, <penberg@...nel.org>, <hannes@...xchg.org>, <mhocko@...e.cz>, <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org> Subject: [PATCH -mm v2 3/8] memcg: mark caches that belong to offline memcgs as dead This will be used by the next patches. Signed-off-by: Vladimir Davydov <vdavydov@...allels.com> Acked-by: Christoph Lameter <cl@...ux.com> --- include/linux/slab.h | 2 ++ mm/memcontrol.c | 1 + mm/slab.h | 10 ++++++++++ 3 files changed, 13 insertions(+) diff --git a/include/linux/slab.h b/include/linux/slab.h index d9716fdc8211..d99d5212b815 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -527,6 +527,7 @@ static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node) * @list: list_head for the list of all caches in this memcg * @root_cache: pointer to the global, root cache, this cache was derived from * @refcnt: reference counter + * @dead: set to true when owner memcg is turned offline * @unregister_work: worker to destroy the cache */ struct memcg_cache_params { @@ -541,6 +542,7 @@ struct memcg_cache_params { struct list_head list; struct kmem_cache *root_cache; atomic_long_t refcnt; + bool dead; struct work_struct unregister_work; }; }; diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 886b5b414958..ed42fd1105a5 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3294,6 +3294,7 @@ static void memcg_unregister_all_caches(struct mem_cgroup *memcg) mutex_lock(&memcg_slab_mutex); list_for_each_entry_safe(params, tmp, &memcg->memcg_slab_caches, list) { cachep = memcg_params_to_cache(params); + cachep->memcg_params->dead = true; kmem_cache_shrink(cachep); if (atomic_long_dec_and_test(&cachep->memcg_params->refcnt)) memcg_unregister_cache(cachep); diff --git a/mm/slab.h b/mm/slab.h index 961a3fb1f5a2..9515cc520bf8 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -121,6 +121,11 @@ static inline bool is_root_cache(struct kmem_cache *s) return !s->memcg_params || s->memcg_params->is_root_cache; } +static inline bool memcg_cache_dead(struct kmem_cache *s) +{ + return !is_root_cache(s) && s->memcg_params->dead; +} + static inline bool slab_equal_or_root(struct kmem_cache *s, struct kmem_cache *p) { @@ -203,6 +208,11 @@ static inline bool is_root_cache(struct kmem_cache *s) return true; } +static inline bool memcg_cache_dead(struct kmem_cache *s) +{ + return false; +} + static inline bool slab_equal_or_root(struct kmem_cache *s, struct kmem_cache *p) { -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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