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Date: Thu, 10 Apr 2008 19:24:37 +0200
From: "Bert Wesarg" <bert.wesarg@googlemail.com>
To: "Mike Travis" <travis@sgi.com>
Subject: Re: [PATCH 1/3] x86: modify show_shared_cpu_map in intel_cacheinfo v3
Cc: "Ingo Molnar" <mingo@elte.hu>, "Paul Jackson" <pj@sgi.com>,
       "Thomas Gleixner" <tglx@linutronix.de>,
       "H. Peter Anvin" <hpa@zytor.com>,
       "Andrew Morton" <akpm@linux-foundation.org>,
       linux-kernel@vger.kernel.org
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On Tue, Apr 8, 2008 at 10:44 PM, Mike Travis <travis@sgi.com> wrote:
>  Btw, you were asking about how to determine NR_CPUS.  Here's one way:
>
>  root@newton:~# cat /sys/devices/system/cpu/online
>  0-2,4-7
>  root@newton:~# cat /sys/devices/system/cpu/possible
>  0-511
>  root@newton:~# cat /sys/devices/system/cpu/present
>  0-7
>  root@newton:~# cat /sys/devices/system/cpu/system
>  0-4095
I think its easier to count the commas from a cpumask file. Here you
must parse a complete list expression, just to get the max id.

Either way, I think this isn't a very clean way.

Bert
>  Thanks,
>  Mike
>