[RFC PATCH 1/7] sched/topology: Assign sd_share for all non NUMA sched domains

[Chen Yu]

Currently, only the domain with SD_SHARE_PKG_RESOURCES flag
would share 1 sd_share for every CPU in this domain. Remove this
restriction and extend it for other sched domains under NUMA
domain.

This shared field will be used by a later patch which optimizes
newidle balancing.

Suggested-by: "Gautham R. Shenoy" <gautham.shenoy@xxxxxxx>
Suggested-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Signed-off-by: Chen Yu <yu.c.chen@xxxxxxxxx>
---
 kernel/sched/topology.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index d3a3b2646ec4..64212f514765 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -1641,10 +1641,10 @@ sd_init(struct sched_domain_topology_level *tl,
 	}
 
 	/*
-	 * For all levels sharing cache; connect a sched_domain_shared
+	 * For all levels except for NUMA; connect a sched_domain_shared
 	 * instance.
 	 */
-	if (sd->flags & SD_SHARE_PKG_RESOURCES) {
+	if (!(sd->flags & SD_NUMA)) {
 		sd->shared = *per_cpu_ptr(sdd->sds, sd_id);
 		atomic_inc(&sd->shared->ref);
 		atomic_set(&sd->shared->nr_busy_cpus, sd_weight);
-- 
2.25.1