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Date:	Sun, 12 Oct 2014 16:37:35 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	riel@...hat.com
Cc:	linux-kernel@...r.kernel.org, mgorman@...e.de, chegu_vinod@...com,
	mingo@...nel.org, efault@....de, vincent.guittot@...aro.org
Subject: Re: [PATCH RFC 3/5] sched,numa: preparations for complex topology
 placement

On Wed, Oct 08, 2014 at 03:37:28PM -0400, riel@...hat.com wrote:
> From: Rik van Riel <riel@...hat.com>
> 
> Preparatory patch for adding NUMA placement on systems with
> complex NUMA topology. Also fix a potential divide by zero
> in group_weight()
> 
> Signed-off-by: Rik van Riel <riel@...hat.com>
> ---
>  include/linux/topology.h |  1 +
>  kernel/sched/core.c      |  2 +-
>  kernel/sched/fair.c      | 57 +++++++++++++++++++++++++++++++-----------------
>  3 files changed, 39 insertions(+), 21 deletions(-)
> 
> diff --git a/include/linux/topology.h b/include/linux/topology.h
> index bf40d46..f8dfad9 100644
> --- a/include/linux/topology.h
> +++ b/include/linux/topology.h
> @@ -47,6 +47,7 @@
>  		if (nr_cpus_node(node))
>  
>  int arch_update_cpu_topology(void);
> +extern int sched_domains_numa_levels;
>  extern int node_hops(int i, int j);
>  

I'm not sure we want to share this globally, please consider using
kernel/sched/sched.h
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