From: Andi Kleen <ak@muc.de>
To: colin@coesta.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: Max CPUs on x86_64 under 2.6.x
Date: Tue, 04 Jan 2005 01:34:50 +0100 [thread overview]
Message-ID: <m14qhyxc9h.fsf@muc.de> (raw)
In-Reply-To: <44438.202.154.120.74.1104760841.squirrel@www.coesta.com> (Colin Coe's message of "Mon, 3 Jan 2005 22:00:41 +0800 (WST)")
"Colin Coe" <colin@coesta.com> writes:
> Hi all
>
> Why is the number of CPUs on the x86_64 architecture only 8 but under i386
> it is 255?
>
> I've searched the list archives and Google but can't find an answer.
Post 2.6.10 x86-64 will support more CPUs. 2.6.10 actually does too,
but the Kconfig hadn't been changed then. Previously there was an
8 CPU APIC driver limit, however it turned out later that it doesn't
apply to some Opteron machines.
-Andi
next prev parent reply other threads:[~2005-01-04 0:41 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-03 14:00 Max CPUs on x86_64 under 2.6.x Colin Coe
2005-01-03 22:15 ` William Lee Irwin III
2005-01-04 0:17 ` Colin Coe
2005-01-04 2:12 ` William Lee Irwin III
2005-01-04 0:34 ` Andi Kleen [this message]
2005-01-04 2:20 ` William Lee Irwin III
2005-01-04 11:09 ` Andi Kleen
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