linux-kernel - Re: [PATCH 01/11] x86: Modify Kconfig to allow up to 4096 cpus

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Message-ID: <20080428133806.GC3973@elte.hu>
Date:	Mon, 28 Apr 2008 15:38:06 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Pavel Machek <pavel@....cz>
Cc:	Mike Travis <travis@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/11] x86: Modify Kconfig to allow up to 4096 cpus


* Pavel Machek <pavel@....cz> wrote:

> On Fri 2008-04-25 17:15:49, Mike Travis wrote:
> >   * Increase the limit of NR_CPUS to 4096 and introduce a boolean
> >     called "MAXSMP" which when set (e.g. "allyesconfig"), will set
> >     NR_CPUS = 4096 and NODES_SHIFT = 9 (512).
> 
> Why is redundant option 'maxsmp' a good idea?

because this way randconfig can trigger it and can configure all the 
otherwise randconfig-invisible [or just plain unlikely] numerics and 
options up to their max.

I found 2-3 "large box" bugs via that way already.

	Ingo
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