[PATCH v6 6/6] sched: add SD_PREFER_SIBLING for SMT level

Vincent Guittot
2014-09-23T16:09:56Z

add the SD_PREFER_SIBLING flag for SMT level in order to ensure that
the scheduler will put at least 1 task per core.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
---
kernel/sched/core.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index c7c8ac4..f72663e 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6134,6 +6134,7 @@ sd_init(struct sched_domain_topology_level *tl, int cpu)
*/

if (sd->flags & SD_SHARE_CPUCAPACITY) {
+ sd->flags |= SD_PREFER_SIBLING;
sd->imbalance_pct = 110;
sd->smt_gain = 1178; /* ~15% */

--
1.9.1