login: pbtest: rdmsr_safe(MSR_IA32_ENERGY_PERF_BIAS=0x1b0)...
pbtest: rdmsr_safe -> error 14, val 0
pbtest: wrmsr_safe(0x1b0, 7)...
pbtest: wrmsr_safe -> error 14
pbtest: raw wrmsr now (perfbias.c:178 path) -- expect #GP panic



Fatal trap 9: general protection fault while in kernel mode
cpuid = 2; lapic id = 2
instruction pointer	= 0x8:0xffffffff826000ad
stack pointer	        = 0x10:0xfffff801182b77c8
frame pointer	        = 0x10:0xfffff801182b77e8
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, long 0, def32 0, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 999
current thread          = pri 6 
kernel: type 9 trap, code=0

CPU2 stopping CPUs: 0x0000003b
 stopped
Stopped at      pbtest_modevent+0xad:   wrmsr
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