From: Christoph Hellwig <hch@ns.caldera.de>
To: Chris Wedgwood <cw@f00f.org>
Cc: Christoph Hellwig <hch@ns.caldera.de>,
linux-kernel@vger.kernel.org, hpa@zytor.com
Subject: Re: How many pentium-3 processors does SMP support?
Date: Tue, 10 Jul 2001 16:19:43 +0200 [thread overview]
Message-ID: <20010710161943.A7785@caldera.de> (raw)
In-Reply-To: <200107101412.f6AEC0W06951@ns.caldera.de> <20010711021639.B31966@weta.f00f.org>
In-Reply-To: <20010711021639.B31966@weta.f00f.org>; from cw@f00f.org on Wed, Jul 11, 2001 at 02:16:39AM +1200
On Wed, Jul 11, 2001 at 02:16:39AM +1200, Chris Wedgwood wrote:
> On Tue, Jul 10, 2001 at 04:12:00PM +0200, Christoph Hellwig wrote:
>
> Why limit the user? There are more than enough Linux system that
> have more than 32 CPUs (SGI, DEC, Sun).
>
> The limit is architecture dependant, for ia32/i386 is it 32.
The number of CPUs is currently globally limited to 32 by NR_CPUS in
include/linux/threads.h.
> Making it a per-architecture value or even a config option make a
> lot more sense.
>
> It turns out I was full of it, you can buy off the shelf 32-processor
> systems.
You can. But you cannot buy 32-processor PII (-Xeon) systems that are
supported by Linux.
> In anyone from Compaq is reading this, you should send me a 32-way
> Xeon ASAP just to prove they really work :)
It doesn't.
Christoph
--
Of course it doesn't work. We've performed a software upgrade.
next prev parent reply other threads:[~2001-07-10 14:20 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-10 5:17 How many pentium-3 processors does SMP support? Xinwei Xue
2001-07-10 5:34 ` H. Peter Anvin
2001-07-10 13:51 ` Chris Wedgwood
2001-07-10 14:12 ` Christoph Hellwig
2001-07-10 14:16 ` Chris Wedgwood
2001-07-10 14:19 ` Christoph Hellwig [this message]
2001-07-10 14:25 ` Chris Wedgwood
2001-07-10 14:32 ` Christoph Hellwig
2001-07-10 14:36 ` Chris Wedgwood
2001-07-10 15:26 ` Randy.Dunlap
2001-07-10 15:50 ` Chris Wedgwood
2001-07-10 15:57 ` Christoph Hellwig
2001-07-10 16:29 ` Ralf Baechle
2001-07-10 16:10 ` Jesper Juhl
2001-07-10 14:30 ` Chris Wedgwood
2001-07-10 14:43 ` Jesper Juhl
[not found] <85256A85.007E98E0.00@D51MTA03.pok.ibm.com>
2001-07-10 23:24 ` Martin J. Bligh
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