linux-kernel - Re: [PATCH -tip] x86: do_boot_cpu

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Date:	Wed, 22 Oct 2008 17:18:46 +0200
From:	Max Kellermann <mk@...all.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Cyrill Gorcunov <gorcunov@...il.com>,
	Glauber Costa <glommer@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Maciej W. Rozycki" <macro@...ux-mips.org>
Subject: Re: [PATCH -tip] x86: do_boot_cpu - check if we have ESR register

On 2008/10/22 16:23, Ingo Molnar <mingo@...e.hu> wrote:
> ah, Compaq - how many CPUs does that box support? If it's 8 or more then 
> perhaps they turned off the real local APIC, fudged some chipset glue to 
> emulate APIC functionality and thus were able to use 8 or more of these 
> chips? The built-in lapic would only go up to 4 CPUs. (or maybe even 
> just up to dual, depending on the model)

No, it's a rather small ProLiant server.  2 physical CPUs, maybe it
supports up to 4, but no more (each with HT).  I have attached its
dmesg.

Max

View attachment "dmesg" of type "text/plain" (17487 bytes)