From: Dave Hansen <dave.han...@linux.intel.com>
The "DIE" topology level is currently defined like this:
static inline const struct cpumask *cpu_cpu_mask(int cpu)
{
return cpumask_of_node(cpu_to_node(cpu));
}
But that makes very little sense on a NUMA system since
the lowest-domain NUMA node is guaranteed to be essentially
the same as this level.
We leave this for systems that are !CONFIG_NUMA and that
might need a top-level domain.
This also keeps us from having screwy topologies when the
smallest NUMA node is only _part_ of the die.
Signed-off-by: Dave Hansen <dave.han...@linux.intel.com>
---
b/kernel/sched/core.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN kernel/sched/core.c~die-is-NUMA-based-and-screwed-up
kernel/sched/core.c
--- a/kernel/sched/core.c~die-is-NUMA-based-and-screwed-up 2014-09-17
15:28:57.867588315 -0700
+++ b/kernel/sched/core.c 2014-09-17 15:28:57.873588591 -0700
@@ -6141,7 +6141,9 @@ static struct sched_domain_topology_leve
#ifdef CONFIG_SCHED_MC
{ cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) },
#endif
+#ifndef CONFIG_NUMA
{ cpu_cpu_mask, SD_INIT_NAME(DIE) },
+#endif
{ NULL, },
};
_
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