Re: [PATCH RFC 3/5] sched,numa: preparations for complex topology placement

[Rik van Riel]

On 10/12/2014 10:37 AM, Peter Zijlstra wrote:
> On Wed, Oct 08, 2014 at 03:37:28PM -0400, riel@xxxxxxxxxx wrote:
> > From: Rik van Riel <riel@xxxxxxxxxx>
> >
> > 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@xxxxxxxxxx>
> > ---
> >   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
Good point. I will do that.
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