diff options
Diffstat (limited to 'mm/slub.c')
| -rw-r--r-- | mm/slub.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/mm/slub.c b/mm/slub.c index 1e5ef312f146..6de08005d9cd 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -3891,7 +3891,7 @@ EXPORT_SYMBOL(kfree); * being allocated from last increasing the chance that the last objects * are freed in them. */ -int __kmem_cache_shrink(struct kmem_cache *s) +int __kmem_cache_shrink(struct kmem_cache *s, bool deactivate) { int node; int i; @@ -3903,6 +3903,21 @@ int __kmem_cache_shrink(struct kmem_cache *s) unsigned long flags; int ret = 0; + if (deactivate) { + /* + * Disable empty slabs caching. Used to avoid pinning offline + * memory cgroups by kmem pages that can be freed. + */ + s->cpu_partial = 0; + s->min_partial = 0; + + /* + * s->cpu_partial is checked locklessly (see put_cpu_partial), + * so we have to make sure the change is visible. + */ + synchronize_sched(); + } + flush_all(s); for_each_kmem_cache_node(s, node, n) { INIT_LIST_HEAD(&discard); @@ -3959,7 +3974,7 @@ static int slab_mem_going_offline_callback(void *arg) mutex_lock(&slab_mutex); list_for_each_entry(s, &slab_caches, list) - __kmem_cache_shrink(s); + __kmem_cache_shrink(s, false); mutex_unlock(&slab_mutex); return 0; |