linux-kernel - Re: x86_64: up to 255 or 256 CPUs?

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Message-ID: <20070220004218.GO21484@holomorphy.com>
Date:	Mon, 19 Feb 2007 16:42:18 -0800
From:	William Lee Irwin III <wli@...omorphy.com>
To:	Adrian Bunk <bunk@...sta.de>
Cc:	ak@...e.de, discuss@...-64.org, linux-kernel@...r.kernel.org
Subject: Re: x86_64: up to 255 or 256 CPUs?

On Tue, Feb 20, 2007 at 01:06:47AM +0100, Adrian Bunk wrote:
> Quoting arch/x86_64/Kconfig:
> <--  snip  -->
> ...
> config NR_CPUS
>         int "Maximum number of CPUs (2-256)"
>         range 2 255
> ...
> <--  snip  -->
> cu
> Adrian

The broadcast APIC ID clashes with the 256th cpu.

-- wli
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