Bug: Soft lockup detected on CPU#0!

[Net Llama!]

On Mon, 16 Jul 2007, Michael Hipp wrote:
> Net Llama! wrote:
>> On Mon, 16 Jul 2007, Michael Hipp wrote:
>>> Anyone seen this error before and know if it is a solvable thing? I have
>>> one server that has done this maybe 4 times in the last 3 weeks. It
>>> results in a hard crash.
>>>
>>> Google knows lots about it and nothing about it.
>>
>> I've seen it happen a number of times, but the cause is almost always
>> specific to something happening on the system.  Its not a generic error
>> with a single solution.
>>
>> Which kernel are you using, and what is the exact output from the lockup?
>
> # uname -r
> 2.6.15-28-server
>
> This is an Ubuntu 6.06 LTS Dapper box.
>
> Not sure exactly what you're asking for. The console says the above
> error and the system is locked hard. Only option is a hardware reset.
> Nothing in the logs from that point on. Cue violin music.

You need to setup a serial console to capture the full output.  I've never 
seen a CPU soft lockup that didn't include a backtrace.

However, the bad news is that you need to punt this off to Ubuntu to 
investigate/fix if you intend to use their kernels.

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lonni J Friedman                        netllama at linux-sxs.org
LlamaLand				http://netllama.linux-sxs.org