[PATCH 1/2] sched/topology: Don't enable EAS on SMT systems

[Valentin Schneider]

EAS already requires asymmetric CPU capacities to be enabled, and mixing
this with SMT is an aberration, but better be safe than sorry.

Signed-off-by: Valentin Schneider <valentin.schneider@xxxxxxx>
---
 kernel/sched/topology.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index 00911884b7e7..76cd0a370b9a 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -360,6 +360,10 @@ static bool build_perf_domains(const struct cpumask *cpu_map)
 		goto free;
 	}
 
+	/* EAS definitely does *not* handle SMT */
+	if (sched_smt_active())
+		goto free;
+
 	for_each_cpu(i, cpu_map) {
 		/* Skip already covered CPUs. */
 		if (find_pd(pd, i))
-- 
2.24.0