File: //sys/devices/system/cpu/hotplug/states
0: offline
1: threads:prepare
2: perf:prepare
3: perf/x86:prepare
9: x86/mce:dead
11: slub:dead
13: mm/writeback:dead
14: mm/demotion:offline
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
40: random:prepare
41: workqueue:prepare
43: hrtimers:prepare
45: x86/x2apic:prepare
46: smpcfd:prepare
47: relay:prepare
48: slab:prepare
49: md/raid5:prepare
50: RCU/tree:prepare
59: base/topology:prepare
62: trace/RB:preapre
63: mm/zsmalloc:prepare
64: mm/zswap:prepare
65: mm/zswap_pool:prepare
68: timers:prepare
70: fork:vm_stack_cache
91: cpu:bringup
92: idle:dead
93: ap:offline
94: sched:starting
95: RCU/tree:dying
106: x86/microcode:starting
108: perf/x86:starting
111: perf/x86/cstate:starting
136: kvm/cpu:starting
146: smpcfd:dying
147: hrtimers:dying
150: ap:online
151: cpu:teardown
153: sched:waitempty
154: smpboot/threads:online
156: irq/affinity:online
157: block/mq:online
159: x86/intel/epb:online
160: perf:online
161: perf/x86:online
162: perf/x86/intel/uncore:online
165: perf/x86/rapl:online
167: perf/x86/cstate:online
190: lockup_detector:online
191: workqueue:online
192: random:online
193: RCU/tree:online
194: base/cacheinfo:online
195: mm/writeback:online
196: mm/vmstat:online
197: padata:online
198: mm/compaction:online
199: io-wq/online
200: lib/percpu_cnt:online
201: idle/intel:online
202: acpi/cpu-drv:online
203: x86/therm:online
204: cpufreq:online
205: leds/trigger:starting
206: x86/mce:online
207: x86/microcode:online
208: printk:online
209: trace/hwlat:online
210: trace/osnoise:online
211: perf/x86/intel/i915:online
212: x86/msr:online
213: swap_slots_cache
214: powercap/rapl:online
215: powercap/rapl:online
216: hwmon/coretemp:online
217: thermal/intel_powerclamp:online
218: thermal/x86_pkg:online
219: x86/cpuid:online
226: mm/demotion:online
228: x86/kvm/clk:online
230: sched:active
231: online