Sung N. Cho writes:

>That's what I thought at first too.  But, someone told me that turning "-g" 
>option supresses any optimizations during compilation.  So, in fact, by 

That's the case with some compilers but not with gcc (as is explicitly
stated in the manpage).  I also doubt that even when the kernel is
compiled without any optimizations that you would notice such gross
performance degradations.

  --mkb