cpufreq(4) panic on RELENG_7 (was: Re: Call for bfe(4) testers.)

[pluknet]

Hi, John.

>> > Fatal trap 12: page fault while in kernel mode
>> > cpuid = 0; apic id = 00
>> > fault virtual address   = 0x38
>> > fault code              = supervisor read, page not present
>> > instruction pointer     = 0x20:0xc058ec16
>> > stack pointer           = 0x28:0xfb8b8ac8
>> > frame pointer           = 0x28:0xfb8b8ac8
>> > code segment            = base 0x0, limit 0xfffff, type 0x1b
>> >                         = DPL 0, pres 1, def32 1, gran 1
>> > processor eflags        = interrupt enabled, resume, IOPL = 0
>> > current process         = 1176 (powerd)
>> > db:0:kdb.enter.default>  show pcpu
>> > cpuid        = 0
>> > curthread    = 0xc4ec0aa0: pid 1176 "powerd"
>> > curpcb       = 0xfb8b8d90
>> > fpcurthread  = none
>> > idlethread   = 0xc3f80cc0: pid 10 "idle: cpu0"
>> > APIC ID      = 0
>> > currentldt   = 0x50
>> > db:0:kdb.enter.default>  bt
>> > Tracing pid 1176 tid 100103 td 0xc4ec0aa0
>> > device_is_attached(0,c87e6b40,fb8b8afc,0,101,...) at device_is_attached+0x6
>> > cf_set_method(c420b600,c87e6b40,64,fb8b8ba4,c87e33b4,...) at
>> cf_set_method+0x6a3
>> > cpufreq_curr_sysctl(c420d840,c4207000,0,fb8b8ba4,fb8b8ba4,...) at
>> cpufreq_curr_sysctl+0x232
>> > sysctl_root(fb8b8ba4,4,1,c4ec0aa0,c4501d38,...) at sysctl_root+0x137
>> > userland_sysctl(c4ec0aa0,fb8b8c14,4,0,0,...) at userland_sysctl+0x151
>> > __sysctl(c4ec0aa0,fb8b8cfc,18,fb8b8ca0,46,...) at __sysctl+0xec
>> > syscall(fb8b8d38) at syscall+0x345
>> > Xint0x80_syscall() at Xint0x80_syscall+0x20
>> > --- syscall (202, FreeBSD ELF32, __sysctl), eip = 0x28161bd3, esp =
>> 0xbfbfe8cc, ebp = 0xbfbfe8f8 ---
>> > db:0:kdb.enter.default>  capture off
>> >

Is it intentional?

(kgdb) p level.rel_count
$44 = 1986356271

First level.rel_set+5 are NULL in my case.
(kgdb) p i
$46 = 0


P.S. Same problem/hardware/bt/sysctl/dmesg on Banias 1.6GHz, worked ok
on previous stable7 from Jun 16.

hth,
pluknet