Re: ip_contrack module refuses to load...

david mosberger
2005-08-30T22:01:01Z

Ah, I understand now what you mean. Sounds to me like the generic
module loader infrastructure needs to be changed to support the
IA64-usage. On IA64, we want to have per-CPU variables remapped even
on UP, because it allows for more efficient and TLB-pinned addressing
(which is relied upon in some low-level code for correctness, IIRC).

--david

On 8/30/05, Peter Chubb <peterc@gelato.unsw.edu.au> wrote:
> >>>>> "david" = david mosberger <dmosberger@gmail.com> writes:
>
> david> The module-loader does its own UP special-casing. For
> david> example, percpu_modcopy() is a dummy routine in the UP case,
> david> apparently because there is not supposed to be any per-CPU
> david> module data for the UP case.
>
> Precisely. All the other architectures redefine the DECLARE_PER_CPU()
> etc., to declare plain variables (i.e., not in a special section) for
> UP. So the module loader doesn't have to do anything special for UP,
> because for UP a per-cpu variable is just the same as a normal
> variable.
>
> This doesn't work for IA64, which maps per_cpu variables into a
> separate segment for both UP and SMP.
>
> --
> Dr Peter Chubb http://www.gelato.unsw.edu.au peterc AT gelato.unsw.edu.au
> The technical we do immediately, the political takes *forever*
>

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