[hpoj-devel] Re: SMP Problems with hpoj-0.6

[Alexander Z. <Ale...@fm...>]

On 13 Sep, David Paschal wrote:

> 
>> But now, how to track this error. Before chrashing there are a lot of
>> messages displayed on the screen (virtual consule 1), but these are not
>> in the log file after rebooting, and scrolling up the screen doesn't
>> work any more, when the kernel crashed. Redirecting to file also does
>> not work. Any idea?
> Redirecting to a file wouldn't work because the messages are sent directly
> to the console by the kernel, rather than through standard output or
> standard error of any particular process.
I added line numbers to the printk statements in  ieee12844pp.c  the
last lines before the crash are (transcribed):

439: get_nibble(e00ba5c0): nibble=0x5
Aiee, killing interupt handle
444: e00ba5c0: event=11.
Kernel panic: Attemped to kill the idle task!
448: e00ba5c0: event=6.
In swapper task - not syncing
433: e00ba5c0: event=9.

Does this help?

> Is there any way you can run an SMP kernel but somehow force your computer
> to only activate one CPU, either by a BIOS setup option, dip switch/jumper,
> or physically removing one CPU (but be careful!)?  If you can duplicate
> this problem with an SMP kernel on a uniprocessor system then I might be
> able to scrounge up an extra PC and set it up to work on this problem if
> nobody else can.
There is no way to deactivate the CPU without unscrewing the machine.
I'll try that as soon as it is possible.

-- 
Ale...@fm... / You look like a million
http://www.fmi.uni-passau.de/~zimmerma/ dollars.  All green and
for PGP public key finger            / wrinkled. 
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