File: //sys/devices/system/cpu/hotplug/states
0: offline
1: threads:prepare
2: perf:prepare
3: perf/x86:prepare
4: perf/x86/amd/uncore:prepare
9: x86/mce:dead
10: virtio/net: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
30: lib/percpu_cnt:dead
31: lib/radix:dead
32: mm/page_alloc:pcp
33: net/dev:dead
35: iommu/iova:dead
38: padata:dead
39: random:prepare
40: workqueue:prepare
42: hrtimers:prepare
45: smpcfd:prepare
46: relay:prepare
47: slab:prepare
49: RCU/tree:prepare
58: base/topology:prepare
61: trace/RB:preapre
62: mm/zsmalloc:prepare
63: mm/zswap:prepare
64: mm/zswap_pool:prepare
67: timers:prepare
69: kvmclock:setup_percpu
70: fork:vm_stack_cache
90: cpu:bringup
91: idle:dead
92: ap:offline
93: sched:starting
94: RCU/tree:dying
106: perf/x86/amd/uncore:starting
107: perf/x86:starting
136: kvm/cpu:starting
145: smpcfd:dying
148: ap:online
149: cpu:teardown
151: sched:waitempty
152: smpboot/threads:online
154: irq/affinity:online
155: block/mq:online
158: perf:online
159: perf/x86:online
161: perf/x86/amd/uncore:online
188: lockup_detector:online
189: workqueue:online
190: random:online
191: RCU/tree:online
192: base/cacheinfo:online
193: x86/kvm:online
194: mm/writeback:online
195: mm/vmstat:online
196: padata:online
197: pci/amd_bus:online
198: mm/compaction:online
199: x86/msr:online
200: x86/cpuid:online
201: lib/percpu_cnt:online
202: acpi/cpu-drv:online
203: x86/mce:online
204: printk:online
205: trace/hwlat:online
206: trace/osnoise:online
207: scsi/bnx2i:online
208: virtio/net:online
224: mm/demotion:online
226: x86/kvm/clk:online
228: sched:active
229: online