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Subject: Re: [Linux-ia64] Re: [PATCH] topology for ia64
From: Michael Hohnbaum <hohnbaum@us.ibm.com>
To: Matthew Dobson <colpatch@us.ibm.com>
Cc: Erich Focht <efocht@ess.nec.de>, davidm@hpl.hp.com,
       linux-ia64 <linux-ia64@linuxia64.org>,
       linux-kernel <linux-kernel@vger.kernel.org>
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On Tue, 2002-10-29 at 14:19, Matthew Dobson wrote:
> Erich Focht wrote:
> +/*
> + * Returns the number of the first CPU on Node 'node'.
> + * Slow in the current implementation.
> + * Who needs this?
> + */
> +/* #define __node_to_first_cpu(node) pool_cpus[pool_ptr[node]] */
> +static inline int __node_to_first_cpu(int node)
> 
> No one is using it now.  I think that I will probably deprecate this 
> function in the near future as it is pretty useless.  Anyone looking for 
> that functionality can just do an __ffs(__node_to_cpu_mask(node)) 
> instead, and hope that there is a reasonably quick implementation of 
> __node_to_cpu_mask.
> 
I'm using this in the simple NUMA scheduler.  This is quite useful
for iterating through a specific node's CPUs.  Yes, the functionality
can be obtained in a different manner, but is less obvious.

-- 

Michael Hohnbaum                      503-578-5486
hohnbaum@us.ibm.com                   T/L 775-5486

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