File: //sys/devices/system/cpu/hotplug/states
0: offline
1: threads:prepare
2: perf:prepare
9: x86/mce:dead
10: virtio/net:dead
11: slub:dead
12: mm/writeback:dead
13: mm/vmstat:dead
14: softirq:dead
19: irq_poll:dead
20: block/softirq:dead
21: acpi/cpu-drv:dead
23: block/mq:dead
24: fs/buffer:dead
25: printk:dead
26: mm/memctrl:dead
27: lib/percpu_cnt:dead
28: lib/radix:dead
29: mm/page_alloc:dead
30: net/dev:dead
35: padata:dead
36: random:prepare
37: workqueue:prepare
39: hrtimers:prepare
42: smpcfd:prepare
43: relay:prepare
44: slab:prepare
45: md/raid5:prepare
46: RCU/tree:prepare
55: base/topology:prepare
58: trace/RB:preapre
59: mm/zsmalloc:prepare
60: mm/zswap:prepare
61: mm/zswap_pool:prepare
64: timers:prepare
66: kvmclock:setup_percpu
67: fork:vm_stack_cache
87: cpu:bringup
88: idle:dead
89: ap:offline
90: sched:starting
91: RCU/tree:dying
126: kvm/cpu:starting
134: smpcfd:dying
137: ap:online
138: cpu:teardown
140: smpboot/threads:online
142: irq/affinity:online
145: perf:online
169: lockup_detector:online
170: workqueue:online
171: random:online
172: RCU/tree:online
173: base/cacheinfo:online
174: x86/kvm:online
175: mm/writeback:online
176: mm/vmstat:online
177: mm/compaction:online
178: padata:online
179: mm/vmscan:online
180: lib/percpu_cnt:online
181: acpi/cpu-drv:online
182: leds/trigger:starting
183: x86/mce:online
184: printk:online
185: platform/x86/turbo_max_3:online
186: virtio/net:online
187: x86/msr:online
206: x86/kvm/clk:online
207: sched:active
208: online