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
13: mm/writeback:dead
15: mm/vmstat:dead
16: softirq:dead
21: irq_poll:dead
22: block/softirq:dead
23: block/bio:dead
24: acpi/cpu-drv:dead
26: block/mq:dead
27: fs/buffer:dead
28: printk:dead
29: mm/memctrl:dead
31: lib/percpu_cnt:dead
32: lib/radix:dead
33: mm/page_alloc:pcp
34: net/dev:dead
36: iommu/iova:dead
39: padata:dead
41: random:prepare
42: workqueue:prepare
44: hrtimers:prepare
47: smpcfd:prepare
48: relay:prepare
49: slab:prepare
51: RCU/tree:prepare
60: base/topology:prepare
63: trace/RB:prepare
65: mm/zswap:prepare
66: mm/zswap_pool:prepare
69: timers:prepare
71: kvmclock:setup_percpu
72: fork:vm_stack_cache
92: cpu:bringup
93: idle:dead
94: ap:offline
95: sched:starting
96: RCU/tree:dying
139: kvm/cpu:starting
149: smpcfd:dying
150: hrtimers:dying
153: ap:online
154: cpu:teardown
156: sched:waitempty
157: smpboot/threads:online
159: irq/affinity:online
160: block/mq:online
163: perf:online
168: perf/x86/rapl:online
197: lockup_detector:online
198: workqueue:online
199: random:online
200: RCU/tree:online
201: base/cacheinfo:online
202: x86/kvm:online
203: mm/writeback:online
204: mm/vmstat:online
205: padata:online
206: mm/compaction:online
207: io-wq/online
208: lib/percpu_cnt:online
209: acpi/cpu-drv:online
210: leds/trigger:starting
211: x86/mce:online
212: printk:online
213: platform/x86/turbo_max_3:online
214: virtio/net:online
235: x86/kvm/clk:online
236: sched:active
237: online