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
14: mm/vmstat:dead
15: softirq:dead
20: irq_poll:dead
21: block/softirq:dead
22: acpi/cpu-drv:dead
24: block/mq:dead
25: fs/buffer:dead
26: printk:dead
27: mm/memctrl:dead
28: lib/percpu_cnt:dead
29: lib/radix:dead
30: mm/page_alloc:dead
31: net/dev:dead
36: padata:dead
37: workqueue:prepare
39: hrtimers:prepare
42: smpcfd:prepare
43: relay:prepare
44: slab: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
142: smpcfd:dying
145: ap:online
146: cpu:teardown
148: smpboot/threads:online
150: irq/affinity:online
151: block/mq:online
154: perf:online
159: perf/x86/rapl:online
181: lockup_detector:online
182: workqueue:online
183: RCU/tree:online
184: base/cacheinfo:online
185: x86/kvm:online
186: mm/writeback:online
187: mm/vmstat:online
188: padata:online
189: mm/compaction:online
190: io-wq/online
191: x86/msr:online
192: x86/cpuid:online
193: lib/percpu_cnt:online
194: acpi/cpu-drv:online
195: cpuidle/haltpoll:online
196: x86/mce:online
197: printk:online
198: platform/x86/turbo_max_3:online
199: virtio/net:online
218: sched:active
219: online