linux-master/mm/shrinker.c

21 static inline void shrinker_unit_free(struct shrinker_info *info, int start)
41 static inline int shrinker_unit_alloc(struct shrinker_info *new,
42 				       struct shrinker_info *old, int nid)
65 	struct shrinker_info *info;
70 		info = rcu_dereference_protected(pn->shrinker_info, true);
73 		rcu_assign_pointer(pn->shrinker_info, NULL);
79 	struct shrinker_info *info;
92 		rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_info, info);
104 static struct shrinker_info *shrinker_info_protected(struct mem_cgroup *memcg,
107 	return rcu_dereference_protected(memcg->nodeinfo[nid]->shrinker_info,
114 	struct shrinker_info *new, *old;
125 		/* Already expanded this shrinker_info */
141 		rcu_assign_pointer(pn->shrinker_info, new);
197 		struct shrinker_info *info;
201 		info = rcu_dereference(memcg->nodeinfo[nid]->shrinker_info);
253 	struct shrinker_info *info;
258 	info = rcu_dereference(memcg->nodeinfo[nid]->shrinker_info);
269 	struct shrinker_info *info;
274 	info = rcu_dereference(memcg->nodeinfo[nid]->shrinker_info);
288 	struct shrinker_info *child_info, *parent_info;
295 	/* Prevent from concurrent shrinker_info expand */
470 	struct shrinker_info *info;
480 	 * The shrinker_info may be freed asynchronously via RCU in the
482 	 * to ensure the existence of the shrinker_info.
491 	 *          shrinker_info.
508 	 *          before calling do_shrink_slab(), the shrinker_info may be
510 	 *          to reacquire the shrinker_info.
514 	info = rcu_dereference(memcg->nodeinfo[nid]->shrinker_info);