Kernel panic when unpluggin AC adaptor

[David DEMELIER]

Hi, I tested your patch and it didn't panic. I checked the dev.cpu
sysctl nodes to see if the CPU freq is changing or not.

I unplugged the cable :
markand at Melon ~ $ sysctl dev.cpu
dev.cpu.0.%desc: ACPI CPU
dev.cpu.0.%driver: cpu
dev.cpu.0.%location: handle=\_PR_.CPU0
dev.cpu.0.%pnpinfo: _HID=none _UID=0
dev.cpu.0.%parent: acpi0
dev.cpu.0.freq: 450
dev.cpu.0.freq_levels: 2101/35000 1837/30625 1600/23888 1400/20902
1200/15000 1050/13125 900/11250 750/9375 600/7500 450/5625 300/3750
150/1875
dev.cpu.0.cx_supported: C1/1 C2/1 C3/162
dev.cpu.0.cx_lowest: C3
dev.cpu.0.cx_usage: 0.00% 99.99% 0.00% last 131us
dev.cpu.1.%desc: ACPI CPU
dev.cpu.1.%driver: cpu
dev.cpu.1.%location: handle=\_PR_.CPU1
dev.cpu.1.%pnpinfo: _HID=none _UID=0
dev.cpu.1.%parent: acpi0
dev.cpu.1.cx_supported: C1/1 C2/1 C3/162
dev.cpu.1.cx_lowest: C3
dev.cpu.1.cx_usage: 0.00% 99.99% 0.00% last 260us

I plugged the cable :

markand at Melon ~ $ sysctl dev.cpu
dev.cpu.0.%desc: ACPI CPU
dev.cpu.0.%driver: cpu
dev.cpu.0.%location: handle=\_PR_.CPU0
dev.cpu.0.%pnpinfo: _HID=none _UID=0
dev.cpu.0.%parent: acpi0
dev.cpu.0.freq: 2101
dev.cpu.0.freq_levels: 2101/35000 1837/30625 1600/23888 1400/20902
1200/15000 1050/13125 900/11250 750/9375 600/7500 450/5625 300/3750
150/1875
dev.cpu.0.cx_supported: C1/1 C2/57
dev.cpu.0.cx_lowest: C1
dev.cpu.0.cx_usage: 100.00% 0.00% last 497us
dev.cpu.1.%desc: ACPI CPU
dev.cpu.1.%driver: cpu
dev.cpu.1.%location: handle=\_PR_.CPU1
dev.cpu.1.%pnpinfo: _HID=none _UID=0
dev.cpu.1.%parent: acpi0
dev.cpu.1.cx_supported: C1/1 C2/57
dev.cpu.1.cx_lowest: C1
dev.cpu.1.cx_usage: 100.00% 0.00% last 497us

Of course I enabled

# Little power management.
performance_cx_lowest="HIGH"
performance_cpu_freq=${performance_cx_lowest}
economy_cx_lowest="LOW"
economy_cpu_freq=${economy_cx_lowest}

in my /etc/rc.conf, it the behavior expected ?

Thanks for your answers :-).

-- 
Demelier David