Re: 2.6.2-rc2-bk1 oopses on boot (ACPI patch)

[Alessandro Suardi <alessandro.suardi@oracle.com>]

Linus Torvalds wrote:
> 
> On Wed, 28 Jan 2004, Alessandro Suardi wrote:
> 
>>Already reported, but I'll do so once again, since it looks like
>>  in a short while I won't be able to boot official kernels in my
>>  current config...
>>
>>	http://www.ussg.iu.edu/hypermail/linux/kernel/0312.3/0442.html
> 
> 
> Can you make adjust_jiffies() print out its arguments (it's in 
> drivers/cpufreq/cpufreq.c).
> 
> It looks like cpufreq_scale() gets a divide-by-zero or an overflow on one 
> of
> 
> 	l_p_j_ref, l_p_j_ref_freq, ci->new
> 
> and just printing out those values would be interesting.

Assuming the late hour (hmm, early by now) hasn't crossed my
  eyes entirely the three above entities are %lu, %u, %u... so
  this line

printk("CPUFREQ DEBUG: [%lu] [%u] [%u]\n", l_p_j_ref, l_p_j_ref_freq, ci->new);

  as both first and last instruction in adjust_jiffies() turns
  up the same values, which are 1773568, 1, 0.


Side-note, since master penguin is looking... after the oops
  all SysRq stuff keeps working - except Alt-SysRq-B; the atkbd.c
  code tells me the keyboard says "too many keys pressed". K, T,
  P just do their job fine.
(yeah, okay, Alt-SysRq-O prints Power Off but obviously doesn't).


Thanks,

--alessandro

  "Two rivers run too deep
   The seasons change and so do I"
       (U2, "Indian Summer Sky")