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SubjectRe: [PATCH 0/8] x86 boot, pda and gdt cleanups
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On Tue, 2007-03-13 at 21:39 -0700, Jeremy Fitzhardinge wrote:
> Rusty Russell wrote:
> > This is called "pissing in the corners". Don't do it: we don't need to
> > touch that code and I actually prefer the original anyway (explicit is
> > *good*).
> >
> > The habit of extracting cpu number once then using it is an optimization
> > which we should be aiming to get rid of (it simply hurts archs with
> > efficient per-cpu implementations).
>
> No, that was for a reason. I was worried about smp_processor_id() not
> returning valid values between init_gdt and cpu_set_gdt. It's not
> actually a problem, but relying on smp_processor_id() while we're moving
> the foundations its based on seems fragile.

smp_processor_id() always works, so it's fundamental, not fragile.

However, we *should* remove the arg from cpu_set_gdt, since we have such
faith in smp_processor_id() 8)

Cheers,
Rusty.



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