Re: x86_64: MAX_LOCAL_APIC way too big?

From	Ingo Molnar <mingo@kernel.org>
Newsgroups	linux.kernel
Subject	Re: x86_64: MAX_LOCAL_APIC way too big?
Date	2015-09-26 08:10 +0200
Message-ID	<qcQQh-8hB-3@gated-at.bofh.it> (permalink)
References	<qcDT3-6vz-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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* Denys Vlasenko <dvlasenk@redhat.com> wrote:

> For 64-bit kernels, MAX_LOCAL_APIC is 32k:
> 
> #ifdef CONFIG_X86_32
> ...
> #else
> # define MAX_IO_APICS 128
> # define MAX_LOCAL_APIC 32768
> #endif
> 
> (It seems to be a bit of a misnomer, it's not a maximum
> number of APICs we support, it's the highest APIC _id_
> we support.)

Gah, that's a pretty serious misnomer - so it should be fixed regardless of 
the outcome of the sizing discussion.

Thanks,

	Ingo
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x86_64: MAX_LOCAL_APIC way too big? Denys Vlasenko <dvlasenk@redhat.com> - 2015-09-25 18:20 +0200
  Re: x86_64: MAX_LOCAL_APIC way too big? Jiang Liu <jiang.liu@linux.intel.com> - 2015-09-25 19:00 +0200
    Re: x86_64: MAX_LOCAL_APIC way too big? Denys Vlasenko <dvlasenk@redhat.com> - 2015-09-25 21:50 +0200
  Re: x86_64: MAX_LOCAL_APIC way too big? Ingo Molnar <mingo@kernel.org> - 2015-09-26 08:10 +0200

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