mm: workingset: update shadow limit to reflect bigger active list

[mirror_ubuntu-artful-kernel.git] / mm / memcontrol.c

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 0f870ba43942e74d1d535a13437e446da5863b1a..91dfc7c5ce8f6229003009b2e75d3056acc5912e 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2154,6 +2154,8 @@ struct memcg_kmem_cache_create_work {
        struct work_struct work;
 };
 
+static struct workqueue_struct *memcg_kmem_cache_create_wq;
+
 static void memcg_kmem_cache_create_func(struct work_struct *w)
 {
        struct memcg_kmem_cache_create_work *cw =
@@ -2185,7 +2187,7 @@ static void __memcg_schedule_kmem_cache_create(struct mem_cgroup *memcg,
        cw->cachep = cachep;
        INIT_WORK(&cw->work, memcg_kmem_cache_create_func);
 
-       schedule_work(&cw->work);
+       queue_work(memcg_kmem_cache_create_wq, &cw->work);
 }
 
 static void memcg_schedule_kmem_cache_create(struct mem_cgroup *memcg,
@@ -5783,6 +5785,17 @@ static int __init mem_cgroup_init(void)
 {
        int cpu, node;
 
+#ifndef CONFIG_SLOB
+       /*
+        * Kmem cache creation is mostly done with the slab_mutex held,
+        * so use a special workqueue to avoid stalling all worker
+        * threads in case lots of cgroups are created simultaneously.
+        */
+       memcg_kmem_cache_create_wq =
+               alloc_ordered_workqueue("memcg_kmem_cache_create", 0);
+       BUG_ON(!memcg_kmem_cache_create_wq);
+#endif
+
        hotcpu_notifier(memcg_cpu_hotplug_callback, 0);
 
        for_each_possible_cpu(cpu)