Messages in this thread | | | Subject | Re: [PATCH] x86: use hard_smp_processor_id to get apic id in identify_cpu -v2 | From | Suresh Siddha <> | Date | Tue, 25 Aug 2009 15:53:55 -0700 |
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On Tue, 2009-08-25 at 15:06 -0700, Yinghai Lu wrote: > > and leave phys_proc_id to use initial apic id.
No. We need to be consistent for both phys_proc_id and apicid computations.
i.e., if the bios changes the apic id's and those updated apic id's are not reflected in the initial apic id, then we need to use hard_smp_processor_id() for both phys_proc_id and apicid computations.
On the other platforms (default option) we need to use initial apic id (returned by cpuid).
> -v2: update the one in detect_extended_topology too.
This is not required. On these platforms, initial_apicid will be updated (along with the physical apicid) if there are any bios modifications.
Instead of this patch, what we need to do is: Just like the vsmp change, we need to override the phys_pkg_id routine for the platforms where the bios will modify apic id's and where cpuid doesn't reflect the bios modification (for example IBM x445 system etc)
thanks, suresh
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