debugging frequent kernel panics on 8.2-RELEASE

[Attilio Rao]

I'd really point the finger to faulty hw.

Please run all the necessary diagnostic tools for catching it.

Attilio

2011/8/11 Andriy Gapon <avg at freebsd.org>:
> on 10/08/2011 18:35 Steven Hartland said the following:
>> Fatal double fault
>> rip = 0xffffffff8052f6f1
>> rsp = 0xffffff86ce600fb0
>> rbp = 0xffffff86ce601210
>> cpuid = 0; apic id = 00
>> panic: double fault
>> cpuid = 0
>> KDB: stack backtrace:
>> #0 0xffffffff803af91e at kdb_backtrace+0x5e
>> #1 0xffffffff8037d817 at panic+0x187
>> #2 0xffffffff80574316 at dblfault_handler+0x96
>> #3 0xffffffff8055d06d at Xdblfault+0xad
> [snip]
>> #0  sched_switch (td=0xffffffff80830bc0, newtd=0xffffff000a73f8c0, flags=Variable
>> "flags" is not available.)
>>    at /usr/src/sys/kern/sched_ule.c:1858
>> 1858                    cpuid = PCPU_GET(cpuid);
>> (kgdb)
>> #0  sched_switch (td=0xffffffff80830bc0, newtd=0xffffff000a73f8c0, flags=Variable
>> "flags" is not available.)
>>    at /usr/src/sys/kern/sched_ule.c:1858
>> #1  0xffffffff80385c86 in mi_switch (flags=260, newtd=0x0)
>>    at /usr/src/sys/kern/kern_synch.c:449
>> #2  0xffffffff803b92d2 in sleepq_timedwait (wchan=0xffffffff80830760, pri=68)
>>    at /usr/src/sys/kern/subr_sleepqueue.c:644
>> #3  0xffffffff803861e1 in _sleep (ident=0xffffffff80830760, lock=0x0,
>>    priority=Variable "priority" is not available.
>> ) at /usr/src/sys/kern/kern_synch.c:230
>> #4  0xffffffff80532c29 in scheduler (dummy=Variable "dummy" is not available.
>> ) at /usr/src/sys/vm/vm_glue.c:807
>> #5  0xffffffff80335d67 in mi_startup () at /usr/src/sys/kern/init_main.c:254
>> #6  0xffffffff8016efac in btext () at /usr/src/sys/amd64/amd64/locore.S:81
>> #7  0xffffffff808556e0 in sleepq_chains ()
>> #8  0xffffffff8083b1e0 in cpu_top ()
>> #9  0x0000000000000000 in ?? ()
>> #10 0xffffffff80830bc0 in proc0 ()
>> #11 0xffffffff80ba4b90 in ?? ()
>> #12 0xffffffff80ba4b38 in ?? ()
>> #13 0xffffff000a73f8c0 in ?? ()
>> #14 0xffffffff803a2cc9 in sched_switch (td=0x0, newtd=0x0, flags=Variable "flags"
>> is not available.
>> )
>>    at /usr/src/sys/kern/sched_ule.c:1852
>> Previous frame inner to this frame (corrupt stack?)
>> (kgdb)
>
> Looks like this is just the first thread in the kernel.
> Perhaps 'thread apply all bt' could help to find the culprit.
>
> --
> Andriy Gapon
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