Recent -current cpucontrol panic: [cpuctl, 129]: cannot bind to target cpu 1

Andrey Chernov ache at
Sun May 22 06:47:12 UTC 2016

With microcode_update_enable="YES" in rc.conf:

db:0:kdb.enter.panic>  show pcpu
cpuid        = 1
dynamic pcpu = 0xfffffe02ac1fd300
curthread    = 0xfffff8000ae75a00: pid 736 "cpucontrol"
curpcb       = 0xfffffe023754eb80
fpcurthread  = none
idlethread   = 0xfffff800022b5000: tid 100003 "idle: cpu1"
curpmap      = 0xfffff8000af02138
tssp         = 0xffffffff80c1cf78
commontssp   = 0xffffffff80c1cf78
rsp0         = 0xfffffe023754eb80
gs32p        = 0xffffffff80c237d0
ldt          = 0xffffffff80c23810
tss          = 0xffffffff80c23800
db:0:kdb.enter.panic>  bt
Tracing pid 736 tid 100121 td 0xfffff8000ae75a00
kdb_enter() at kdb_enter+0x3b/frame 0xfffffe023754e620
vpanic() at vpanic+0x19f/frame 0xfffffe023754e6a0
kassert_panic() at kassert_panic+0x126/frame 0xfffffe023754e710
cpuctl_do_cpuid_count() at cpuctl_do_cpuid_count+0x85/frame
cpuctl_ioctl() at cpuctl_ioctl+0x389/frame 0xfffffe023754e800
devfs_ioctl_f() at devfs_ioctl_f+0x156/frame 0xfffffe023754e860
kern_ioctl() at kern_ioctl+0x204/frame 0xfffffe023754e8c0
sys_ioctl() at sys_ioctl+0x171/frame 0xfffffe023754e9a0
amd64_syscall() at amd64_syscall+0x28e/frame 0xfffffe023754eab0
Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe023754eab0
--- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x8009778ea, rsp =
0x7fffffffe788, rbp = 0x7fffffffe7d0 ---

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