[2/2] powerpc/numa: ensure per-cpu NUMA mappings are correct on topology update

Nishanth Aravamudan nacc at linux.vnet.ibm.com
Wed Oct 29 04:33:19 AEDT 2014

Hi Michael,

On 21.10.2014 [15:36:27 +1100], Michael Ellerman wrote:
> On Sat, 2014-18-10 at 00:50:40 UTC, Nishanth Aravamudan wrote:
> > We received a report of warning in kernel/sched/core.c where the sched
> > group was NULL on an LPAR after a topology update. This seems to occur
> > because after the topology update has moved the CPUs, cpu_to_node is
> > returning the old value still, which ends up breaking the consistency of
> > the NUMA topology in the per-cpu maps. Ensure that we update the per-cpu
> > fields when we re-map CPUs.
> This looks like a bug fix, I assume you want it to go in for 3.18 ?

Yes, please!


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