Re: [PATCH] x86_64: use apic core id bits for core nums

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On 7/21/07, Andi Kleen <[email protected]> wrote:
On Saturday 21 July 2007 13:21:34 Yinghai Lu wrote:
> On 7/21/07, Andi Kleen <[email protected]> wrote:
> > On Saturday 21 July 2007 09:56:15 Yinghai Lu wrote:
> > > please check my version, we should use core id bits instead.
> > >
> > > it should replace
> > > [PATCH for review] [37/48] x86_64: make k8topology multi-core aware
> >
> > Yes, you're right the patch is not good. It should probably use
> > information from the regular CPU setup code, not touch cpuid
> > directly
>
> need move some code into early_identify_cpu from identify_cpu in
> arch/x86_64/kernel/setup.c
> then could use that bits in bsp cpu info.

Yes something like this

> BTW:
> it seems for BSP only early_identify_cpu is called, and identify_cpu
> is only use in smp_callin for AP. Do i miss sth.

identify_cpu calls early_identify_cpu as first thing.

the calling to identify_cpu in BSP is in check_bugs(). It is easy to
ignore it...
maybe we could move that to setup_arch directly.

YH
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