debugobjects: Track number of kmem_cache_alloc/kmem_cache_free done (c4b73aab) · Commits · 戴 / test

lib/debugobjects.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -55,6 +55,12 @@ static int debug_objects_enabled __read_mostly

		static struct debug_obj_descr *descr_test __read_mostly;

		/*
		* Track numbers of kmem_cache_alloc and kmem_cache_free done.
		*/
		static int debug_objects_alloc;
		static int debug_objects_freed;

		static void free_obj_work(struct work_struct *work);
		static DECLARE_WORK(debug_obj_work, free_obj_work);

		@@ -102,6 +108,7 @@ static void fill_pool(void)

		raw_spin_lock_irqsave(&pool_lock, flags);
		hlist_add_head(&new->node, &obj_pool);
		debug_objects_alloc++;
		obj_pool_free++;
		raw_spin_unlock_irqrestore(&pool_lock, flags);
		}
		@@ -173,6 +180,7 @@ static void free_obj_work(struct work_struct *work)
		obj = hlist_entry(obj_pool.first, typeof(*obj), node);
		hlist_del(&obj->node);
		obj_pool_free--;
		debug_objects_freed++;
		/*
		* We release pool_lock across kmem_cache_free() to
		* avoid contention on pool_lock.
		@@ -758,6 +766,8 @@ static int debug_stats_show(struct seq_file m, void v)
		seq_printf(m, "pool_min_free :%d\n", obj_pool_min_free);
		seq_printf(m, "pool_used :%d\n", obj_pool_used);
		seq_printf(m, "pool_max_used :%d\n", obj_pool_max_used);
		seq_printf(m, "objects_alloc :%d\n", debug_objects_alloc);
		seq_printf(m, "objects_freed :%d\n", debug_objects_freed);
		return 0;
		}