hotplug_memory_notifier  740 mm/kasan/common.c 	hotplug_memory_notifier(kasan_mem_notifier, 0);
hotplug_memory_notifier 3215 mm/ksm.c       	hotplug_memory_notifier(ksm_memory_callback, 100);
hotplug_memory_notifier  402 mm/page_ext.c  	hotplug_memory_notifier(page_ext_callback, 0);
hotplug_memory_notifier 1292 mm/slab.c      	hotplug_memory_notifier(slab_memory_callback, SLAB_CALLBACK_PRI);