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

[Linus Torvalds <torvalds _at_ xxxxxxxx>]

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.

That said, the code is crap anyway. It does various divides without 
actually testing for any sanity at all, and tries to "avoid overflow" by 
totally bogus methods, instead of just using the 64-bit do_div64().

Dominic? Dave? Suggestions about nicer failure modes?

		Linus
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