Re: x86 profiling

["John Hawkes" <hawkes@xxxxxxx>]

> I patched a 2.4.9 kernel with the profiling package,
> and the kernel crashes right away when I try to
> enable some other mode than PC sampling.
>
> Seems like the combination of regparm, -pg flag and
> -O2 flag are causing trouble.
> I tried Redhat's gcc 2.96, as well as their gcc 3.0.4,
> and I'm seeing this behavior with both of the
> compilers.

Yes, indeed.  For gcc 2.96 you need the gcc patch that's on the kernprof
website.  I don't have much experience with gcc 3.x and kernprof, so I
don't know how to solve that problem.

John Hawkes