From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andreas Schwab <schwab@suse.de>
Date: Tue, 06 Dec 2005 09:57:51 +0000
Subject: Re: Reading /proc/stat is slooow
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List-Id: <linux-ia64.vger.kernel.org>
References: <je1x0v4cpy.fsf@sykes.suse.de>
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To: linux-ia64@vger.kernel.org

"Luck, Tony" <tony.luck@intel.com> writes:

>>I just tried CONFIG_NR_CPUS=1024 ... and I don't see anything
>>like a 20ms delay on 2.6.15-rc5.  How many actual cpus on your
>>machine (I only have two on the machine where I tested)?
>
> Ah ... but I didn't have CONFIG_HOTPLUG_CPU set

Ah, that's the difference.  I didn't have CONFIG_HOTPLUG_CPU set in 2.6.13
either.

Andreas.

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Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstra=DFe 5, 90409 N=FCrnberg, Germany
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"And now for something completely different."